Queensland Alliance for Agriculture and Food Innovation

Professor Bruce Topp

Professorial Research Fellow
Queensland Alliance for Agriculture and Food Innovation
+61 7 5381 1373
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Publications

Book Chapters (5)
Journal Articles (64)
Conference Papers (67)
Data Collections (4)
Newspaper Articles (2)

Book Chapters

Topp, Bruce L., Nock, Catherine J., Hardner, Craig M., Alam, Mobashwer and O’Connor, Katie M. (2019). Macadamia (Macadamia spp.) breeding. Advances in plant breeding strategies: nut and beverage crops. (pp. 221-251) edited by Jameel M. Al-Khayri, Shri Mohan Jain and Dennis V. Johnson. Cham, Switzerland: Springer International Publishing. doi: 10.1007/978-3-030-23112-5_7
Hardner, C. and Topp, B. (2018). Macadamia integrifolia and M. tetraphylla. Trees for life in Oceania: conservation and utilisation of genetic diversity. (pp. 147-151) edited by Lee Thomson, John Doran and Bronwyn Clarke. Canberra, ACT Australia: Australian Centre for International Agricultural Research.
Fanning, Kent, Stanley, Roger, Topp, Bruce, Russell, Dougal and Netzel, Michael (2016). Plum, prune, and ume juices. Handbook of functional beverages and human health. (pp. 501-512) edited by Fereidoon Shahidi and Cesarettin Alasalvar. Boca Raton, FL, United States: CRC Press. doi: 10.1201/b19490-47
Topp, Bruce L., Russell, Dougal M., Neumüller, Michael, Dalbó, Marco A. and Liu, Weisheng (2012). Plum. Fruit breeding. (pp. 571-621) edited by Marisa Luisa Badenes and David H. Byrne. New York, United States: Springer. doi: 10.1007/978-1-4419-0763-9_15
Topp, B. L., Sherman, W. B. and Raseira, M. C. B. (2008). Low-chill cultivar development. The peach: Botany, production and uses. (pp. 106-138) edited by Desmond R. Layne and Daniele Bassi. Wallingford, Oxfordshire, United Kingdom: CABI Publishing.

Journal Articles

Kaur, Palakdeep, Cowan, Max, De Faveri, Joanne, Alam, Mobashwer and Topp, Bruce (2024). Evaluating self-pollination methods: their impact on nut set and nutlet abscission in macadamia. Plants, 13 (24) 3456, 1-12. doi: 10.3390/plants13243456
Poudel, Pragya Dhakal, Cowan, Max, De Faveri, Joanne, Topp, Bruce and Alam, Mobashwer (2024). Genetic variability in macadamia rootstocks and their effects on early vigor traits of ‘HAES 741′. Scientia Horticulturae, 338 113842, 113842. doi: 10.1016/j.scienta.2024.113842
Manatunga, Sachini Lakmini, Furtado, Agnelo, Topp, Bruce, Alam, Mobashwer, Mason, Patrick J., Kharabian-Masouleh, Ardashir and Henry, Robert J. (2024). Analysis of phylogenetic relationships in Macadamia shows evidence of extensive reticulate evolution. Frontiers in Plant Science, 15 1394244. doi: 10.3389/fpls.2024.1394244
Kodagoda, Gethmini Kavindya, Hong, Hung Trieu, O’Hare, Tim J., Topp, Bruce, Sultanbawa, Yasmina and Netzel, Michael Erich (2024). Storage Effects on the Physicochemical Properties, Phytochemical Composition, and Sugars in Red-Fleshed Cultivars, ‘Rubycot’ Plumcot, and ‘Queen Garnet’ Plum. Molecules, 29 (19) 4641, 4641. doi: 10.3390/molecules29194641
Sharma, Priyanka, Masouleh, Ardashir Kharabian, Constantin, Lena, Topp, Bruce, Furtado, Agnelo and Henry, Robert J. (2024). Genome sequences to support conservation and breeding of <i>Macadamia</i>. Tropical Plants e035, 1-11. doi: 10.48130/tp-0024-0029
Dhakal Poudel, Pragya, Cowan, Max, Shaw, Lindsay, De Faveri, Joanne, Topp, Bruce and Alam, Mobashwer (2023). Macadamia breeding for reduced plant vigor: progress and prospects for profitable and sustainable orchard systems. Sustainability, 15 (19) 14506, 14506. doi: 10.3390/su151914506
Nunn, Jasmine, Hardner, Craig, De Faveri, Joanne, Akinsanmi, Olufemi A., O’Connor, Katie, Alam, Mobashwer and Topp, Bruce (2023). Genetic parameters of husk spot resistance in macadamia breeding families. Euphytica, 219 (5) 54, 1-21. doi: 10.1007/s10681-023-03169-2
Hu, Wei, Fitzgerald, Melissa, Topp, Bruce, Alam, Mobashwer, Pun, Sharon, Dianna, Liu, Torrisi, Caterina and O’Hare, Tim J. (2023). The effects of pollen source on the fatty acid profile of macadamia kernels. Journal of Food Composition and Analysis, 115 104943, 1-7. doi: 10.1016/j.jfca.2022.104943
Nunn, Jasmine, Akinsanmi, Olufemi Akinyemi, Hardner, Craig, De Faveri, Joanne, O'Connor, Katie, Alam, Mobashwer and Topp, Bruce (2023). Evaluation of in-field inoculation methods for characterisation of macadamia germplasm to husk spot incidence and severity. Plant Disease, 107 (1), 76-82. doi: 10.1094/pdis-03-22-0507-re
Nunn, Jasmine, De Faveri, Joanne De, O’Connor, Katie, Alam, Mobashwer, Hardner, Craig, Akinsanmi, Olufemi and Topp, Bruce (2022). Genome-wide association study for abscission failure of fruit pericarps (stick-tights) in wild macadamia germplasm. Agronomy, 12 (8) 1913, 1913. doi: 10.3390/agronomy12081913
Kern, Stéphane, Santos, Bruno, Topp, Bruce, Cave, Robyn, Bignell, Grant, Mulo, Shane and Hardner, Craig (2022). Using choice analysis of growers’ preferences to prioritize breeding traits in horticultural tree crops: a macadamia case study. Scientia Horticulturae, 294 110766, 110766. doi: 10.1016/j.scienta.2021.110766
Hu, Wei, Fitzgerald, Melissa, Topp, Bruce, Alam, Mobashwer and O'Hare, Tim J. (2022). Fatty acid diversity and interrelationships in macadamia nuts. LWT, 154 112839, 112839. doi: 10.1016/j.lwt.2021.112839
Zakeel, Mohamed Cassim Mohamed, Alam, Mobashwer, Geering, Andrew D. W., Topp, Bruce and Akinsanmi, Olufemi A. (2021). Discovery of Single Nucleotide Polymorphisms for Resistance to Abnormal Vertical Growth in Macadamia. Frontiers in Plant Science, 12 756815, 756815. doi: 10.3389/fpls.2021.756815
Sharma, Priyanka, Murigneux, Valentine, Haimovitz, Jasmine, Nock, Catherine J., Tian, Wei, Kharabian Masouleh, Ardashir, Topp, Bruce, Alam, Mobashwer, Furtado, Agnelo and Henry, Robert J. (2021). The genome of the endangered Macadamia jansenii displays little diversity but represents an important genetic resource for plant breeding. Plant Direct, 5 (12) e364, e364. doi: 10.1002/pld3.364
Sharma, Priyanka, Kharabian Masouleh, Ardashir, Topp, Bruce, Furtado, Agnelo and Henry, Robert J. (2021). Denovo chromosome level assembly of a plant genome from long read sequence data. The Plant Journal, 109 (3), 727-736. doi: 10.1111/tpj.15583
Mai, Thuy T. P., Hardner, Craig M., Alam, Mobashwer M., Henry, Robert J. and Topp, Bruce L. (2021). Phenotypic characterisation for growth and nut characteristics revealed the extent of genetic diversity in wild macadamia germplasm. Agriculture, 11 (7) 680, 1-14. doi: 10.3390/agriculture11070680
Jeff-Ego, Olumide S., Drenth, Andre, Topp, Bruce, Henderson, Juliane and Akinsanmi, Olufemi A. (2021). Variability and inheritance in macadamia progenies to Phytophthora cinnamomi and P. multivora the causal agents of root rot and stem canker. Plant and Soil, 466 (1-2), 449-465. doi: 10.1007/s11104-021-05064-y
Sharma, Priyanka, Al-Dossary, Othman, Alsubaie, Bader, Al-Mssallem, Ibrahim, Nath, Onkar, Mitter, Neena, Rodrigues Alves Margarido, Gabriel, Topp, Bruce, Murigneux, Valentine, Kharabian Masouleh, Ardashir, Furtado, Agnelo and Henry, Robert J. (2021). Improvements in the sequencing and assembly of plant genomes. Gigabyte, 2021, 1-10. doi: 10.46471/gigabyte.24
O’Connor, Katie M., Hayes, Ben J., Hardner, Craig M., Alam, Mobashwer, Henry, Robert J. and Topp, Bruce L. (2021). Genomic selection and genetic gain for nut yield in an Australian macadamia breeding population. BMC Genomics, 22 (1) 370, 1-12. doi: 10.1186/s12864-021-07694-z
Kodagoda, Gethmini, Hong, Hung T., O’Hare, Tim J., Sultanbawa, Yasmina, Topp, Bruce and Netzel, Michael E. (2021). Effect of storage on the nutritional quality of Queen Garnet plum. Foods, 10 (2) 352, 352. doi: 10.3390/foods10020352
Jeff‐Ego, Olumide S., Topp, Bruce, Drenth, Andre, Henderson, Julianne and Akinsanmi, Olufemi A. (2021). Resistance in wild macadamia germplasm to Phytophthora cinnamomi and P. multivora. Annals of Applied Biology, 178 (3) aab.12668, 519-526. doi: 10.1111/aab.12668
Murigneux, Valentine, Rai, Subash Kumar, Furtado, Agnelo, Bruxner, Timothy J. C., Tian, Wei, Harliwong, Ivon, Wei, Hanmin, Yang, Bicheng, Ye, Qianyu, Anderson, Ellis, Mao, Qing, Drmanac, Radoje, Wang, Ou, Peters, Brock A, Xu, Mengyang, Wu, Pei, Topp, Bruce, Coin, Lachlan J. M. and Henry, Robert J. (2020). Comparison of long-read methods for sequencing and assembly of a plant genome. GigaScience, 9 (12) giaa146. doi: 10.1093/gigascience/giaa146
Nock, Catherine J., Baten, Abdul, Mauleon, Ramil, Langdon, Kirsty S., Topp, Bruce, Hardner, Craig, Furtado, Agnelo, Henry, Robert J. and King, Graham J. (2020). Chromosome-scale assembly and annotation of the macadamia genome (Macadamia integrifolia HAES 741). G3: Genes, Genomes, Genetics, 10 (10), 3497-3504. doi: 10.1534/g3.120.401326
Jeff‐Ego, Olumide S., Drenth, Andre, Topp, Bruce, Henderson, Juliane and Akinsanmi, Olufemi A. (2020). Prevalence of Phytophthora species in macadamia orchards in Australia and their ability to cause stem canker. Plant Pathology, 69 (7) ppa.13208, 1270-1280. doi: 10.1111/ppa.13208
Kern, Stephane, Santos, Bruno, Cave, Robyn, Topp, Bruce and Hardner, Craig (2020). Demand driven breeding of horticultural tree crops: proof of concept using macadamia. Australian Macadamia Society News Bulletin, 75-76.
Mai, Thuy, Alam, Mobashwer, Hardner, Craig, Henry, Robert and Topp, Bruce (2020). Genetic structure of wild germplasm of macadamia: species assignment, diversity and phylogeographic relationships. Plants, 9 (6) 714, 1-16. doi: 10.3390/plants9060714
Langdon, Kirsty S., King, Graham J., Baten, Abdul, Mauleon, Ramil, Bundock, Peter C., Topp, Bruce L. and Nock, Catherine J. (2020). Maximising recombination across macadamia populations to generate linkage maps for genome anchoring. Scientific Reports, 10 (1) 5048, 5048. doi: 10.1038/s41598-020-61708-6
O’Connor, Katie, Hayes, Ben, Hardner, Craig, Nock, Catherine, Baten, Abdul, Alam, Mobashwer, Henry, Robert and Topp, Bruce (2020). Genome-wide association studies for yield component traits in a macadamia breeding population. BMC Genomics, 21 (1) 199, 199. doi: 10.1186/s12864-020-6575-3
Hu, Wei, Fitzgerald, Melissa, Topp, Bruce, Alam, Mobasher and O'Hare, Tim J. (2019). A review of biological functions, health benefits, and possible de novo biosynthetic pathway of palmitoleic acid in macadamia nuts. Journal of Functional Foods, 62 103520, 103520. doi: 10.1016/j.jff.2019.103520
Ahsan, Muhammad Umair, Hayward, Alice, Alam, Mobashwer, Bandaralage, Jayeni Hiti, Topp, Bruce, Beveridge, Christine Anne and Mitter, Neena (2019). Scion control of miRNA abundance and tree maturity in grafted avocado. BMC Plant Biology, 19 (1) 382, 382. doi: 10.1186/s12870-019-1994-5
Toft, Benjamin D., Alam, Mobashwer M. and Topp, Bruce L. (2019). Anatomical structure associated with vegetative growth variation in macadamia. Plant and Soil, 444 (1-2), 343-350. doi: 10.1007/s11104-019-04285-6
O’Connor, Katie, Kilian, Andrzej, Hayes, Ben, Hardner, Craig, Nock, Catherine, Baten, Abdul, Alam, Mobashwer and Topp, Bruce (2019). Population structure, genetic diversity and linkage disequilibrium in a macadamia breeding population using SNP and silicoDArT markers. Tree Genetics & Genomes, 15 (2) 24, 24. doi: 10.1007/s11295-019-1331-z
O’Connor, Katie, Hayes, Ben, Hardner, Craig, Alam, Mobashwer and Topp, Bruce (2019). Selecting for nut characteristics in macadamia using a genome-wide association study. HortScience, 54 (4), 629-632. doi: 10.21273/hortsci13297-18
Toft, Benjamin D., Alam, Mobashwer M., Wilkie, John D. and Topp, Bruce L. (2019). Phenotypic association of multi-scale architectural traits with canopy volume and yield: moving toward high-density systems for macadamia. HortScience, 54 (4), 596-602. doi: 10.21273/hortsci13293-18
Alam, Mobashwer, Hardner, Craig, Nock, Catherine, O’Connor, Katie and Topp, Bruce (2019). Historical and molecular evidence of genetic identity of macadamia cultivars HAES741 and HAES660. HortScience, 54 (4), 616-620. doi: 10.21273/hortsci13318-18
O’Hare, Tim J., Trieu, Hung Hong, Topp, Bruce, Russell, Dougal, Pun, Sharon, Torrisi, Caterina and Liu, Dianna (2019). Assessing fatty acid profiles of macadamia nuts. HortScience, 54 (4), 633-637. doi: 10.21273/hortsci13418-18
Alam, Mobashwer, Neal, Jodi, O'Connor, Katie, Kilian, Andrzej and Topp, Bruce (2018). Ultra-high-throughput DArTseq-based silicoDArT and SNP markers for genomic studies in macadamia. PLoS One, 13 (8) e0203465, e0203465. doi: 10.1371/journal.pone.0203465
Toft, Benjamin D., Alam, Mobashwer and Topp, Bruce (2018). Estimating genetic parameters of architectural and reproductive traits in young macadamia cultivars. Tree Genetics and Genomes, 14 (4) 50. doi: 10.1007/s11295-018-1265-x
O'Connor, Katie, Hayes, Ben and Topp, Bruce (2018). Prospects for increasing yield in macadamia using component traits and genomics. Tree Genetics & Genomes, 14 (1) 7. doi: 10.1007/s11295-017-1221-1
Akinsanmi, Olufemi A., Geering, Andrew D.W., Pandit, Pratibala, Topp, Bruce , O'Hare, P., Mulo, S. and Searle, C. (2017). Abnormal vertical growth syndrome in macadamia – how widespread, what causes it?. Australian Macadamia Society News Bulletin, 45 (4), 57-59.
Akinsanmi, O. A., Neal, J., Drenth, A. and Topp, B. (2017). Characterization of accessions and species of Macadamia to stem infection by Phytophthora cinnamomi. Plant Pathology, 66 (2), 186-193. doi: 10.1111/ppa.12566
Akinsanmi, Olufemi A., Wang, Gang, Neal, Jodi, Russell, Dougal, Drenth, Andre and Topp, Bruce (2016). Variation in susceptibility among macadamia genotypes and species to Phytophthora root decay caused by Phytophthora cinnamomi. Crop Protection, 87, 37-43. doi: 10.1016/j.cropro.2016.04.021
Bobrich, Anna, Fanning, Kent J., Rychlik, Michael, Russell, Dougal, Topp, Bruce and Netzel, Michael (2014). Phytochemicals in Japanese plums: impact of maturity and bioaccessibility. Food Research International, 65 (Part A), 20-26. doi: 10.1016/j.foodres.2014.06.030
Fanning, Kent, Topp, Bruce, Russell, Dougal and Netzel, Michael (2014). Western plums make room – opportunities to develop the health profile and functional applications of Asia’s plums. Food Asia Pacific, 1 (2), 25-25.
Fanning, Kent, Topp, Bruce, Berecry, Rowan, Stanley, Roger and Netzel, Michael (2014). Plums: an untapped nutritional source. The World of Food Ingredients, 09, 82-83.
Fanning, Kent J., Topp, Bruce, Russell, Dougal, Stanley, Roger and Netzel, Michael (2014). Japanese plums (Prunus salicina Lindl.)and phytochemicals – breeding, horticultural practice, postharvest storage, processing and bioactivity. Journal of The Science of Food and Agriculture, 94 (11), 2137-2147. doi: 10.1002/jsfa.6591
Akinsanmi, Olufemi A., Topp, Bruce and Drenth, Andre (2012). Pericarps retained in the tree canopy and stomatal abundance are components of resistance to husk spot caused by Pseudocercospora macadamiae in macadamia. Euphytica, 185 (2), 313-323. doi: 10.1007/s10681-012-0645-9
Topp, Bruce L., Russell, Dougal M., Neumuller, Michael, Dalbó, Marco A. and Liu, Weisheng (2012). Erratum to Plum [8, (2012)]. Fruit breeding, E5-E6. doi: 10.1007/978-1-4419-0763-9_23
Russell, D. M. and Topp, B. L. (2011). 'Queen Garnet' (Prunus salicina) Japanese plum. Plant Varieties Journal, 24 (3), 141-143.
Hamill, S., Promchot, S., Bignell, G., Giles, J. and Topp, B. (2010). Vermiculite improves early development and survival of low chill stone-fruit embryos rescued in vitro. Acta Horticulturae, 829, 79-83.
Topp, B.L. and Sherman, W.B. (2000). Nectarine skin speckling is associated with flesh soluble solids content. Journal of the American Pomological Society, 54 (4), 177-182.
Topp, B. L., Sherman, W. B., Stall, R. E., Minsavage, G. V. and Wilcox, C. J. (1993). Comparison of Greenhouse Methods for Assessing Resistance to Bacterial Leaf Spot in Plum. Journal of the American Society for Horticultural Science, 118 (5), 667-671.
Topp, B.L., Sherman, W.B., Huber, D.A. and Linda, S.B. (1993). Combining abilities of 5 Japanese plum cultivars for resistance to xanthomonas stem canker. Hortscience, 28 (7), 727-729.
Sherman, W.B., Topp, B.L. and Lyrene, P.M. (1992). Breeding low-chill Japanese-type plums for subtropical climates. Acta Horticulturae (317), 149-154. doi: 10.17660/actahortic.1992.317.16
Sherman, W.B., Rodriguez, J. and Topp, B.L. (1992). Peaches and nectarines developed but not released by the University of Florida. Fruit Varieties Journal, 46 (2), 124-127.
Topp, B. L. and Russell, D. M. (1990). 'Granite Supreme' peach. HortScience, 25 (8), 986-986.
Topp, B.L. and Russell, D.M. (1990). 'Queensland Bellerosa' plum. HortScience, 25 (7), 814-814.
Topp, B.L. and Russell, D.M. (1990). 'Queensland Earlisweet' cherry plum. HortScience, 25 (6), 713-713.
Topp, B. L. and Sherman, W. B. (1990). Sources of bacterial spot resistance in Japanese-type plum cultivars. Fruit Varieties Journal, 44 (1), 32-35.
Topp, B.L. and Sherman, W.B. (1989). The relationship between temperature and bloom-to-ripening period in low-chill peach. Fruit Varieties Journal, 43 (4), 155-158.
Topp, Bruce and Sherman, Wayne (1989). Peach chilling requirement. Queensland Fruit and Vegetable News, 18-18.
Topp, B.L., Heaton, J.B. and Russell, D.M. (1989). Introduction and evaluation of stonefruit varieties for the granite belt of Queensland. Acta Horticulturae (240), 39-42. doi: 10.17660/actahortic.1989.240.5
Topp, B. L. and Russell, D. M. (1989). Breeding early ripening Japanese plums. Acta Horticulturae (240), 27-30. doi: 10.17660/actahortic.1989.240.2
Topp, B.L., Heaton, J.B., Russell, D.M. and Mayer, R. (1989). Field susceptibility of Japanese-type plums to Xanthomonas campestris pv. pruni. Australian Journal of Experimental Agriculture, 29 (6), 905-909. doi: 10.1071/ea9890905

Conference Papers

Poudel, P. D., Shaw, L., Topp, B. and Alam, M. (2024). Vigour in macadamia: Genetic and physiological insights into rootstocks. AusMac 2024, Gold Coast, QLD, Australia, 29-31 October 2024.
Poudel, P. D., Ahmed, B., Shaw, L., Topp, B. and Alam, M. (2024). Exploring the molecular basis of rootstock-mediated growth vigour in macadamia: Unravelling aquaporin gene dynamics. American Society of Horticultural Science Annual Conference, Honolulu, HI, United States, 23-27 September 2024.
Kern, S., Santos, B., Topp, B., Cave, R., Bignell, G., Mulo, S. and Hardner, C. (2023). Value chain stakeholder preferences are misaligned with economic weights derived from the bio-economic model: what is the effect on the ranking of candidates?. XXXI International Horticultural Congress (IHC2022): International Symposium on Breeding and Effective Use of Biotechnology and Molecular Tools in Horticultural Crops, Angers, France, 14-20 August 2022. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/actahortic.2023.1362.71
Kodagoda, G.K., Hong, H.T., Addepalli, R., Topp, B., Sultanbawa, Y., O'Hare, T.J., Netzel, M.E. and Osborne, S. (2023). Impact of storage on in vitro bioaccessibility of anthocyanins in ‘Rubycot’ plumcot and ‘Queen Garnet’ plum. 46th Annual Scientific Meeting of the Nutrition Society of Australia, Perth, WA Australia, 29 November – 2 December 2022. Cambridge, United Kingdom: Cambridge University Press. doi: 10.1017/s0029665123001210
Kodagoda, G. K., Hong, H. T., Addepalli, R., Topp, B., Sultanbawa, Y., O'Hare, T. J., Netzel, M. E. and Osborne, S. (2022). Impact of storage on in vitro bioaccessibility of anthocyanins in 'Rubycot' plumcot and 'Queen Garnet' plum. Nutrition Society of Australia (NSA) Annual Scientific Meeting, Perth, WA Australia, 29 November-2 December 2022.
Poudel, P. D., Shaw, L., Topp, B. and Alam, M. (2022). Towards high density macadamia orchards. AusMac 2022, Gold Coast, QLD, Australia, 7-9 November 2022.
Kodagoda, Gethmini , Hong, Hung T. , Addepalli, Rama , Topp, Bruce , Sultanbawa, Yasmina , O'Hare, Tim J. , Netzel, Michael E. and Osborne, Simone (2022). Does storage affect the in vitro bioaccessibility of anthocyanins in 'Rubycot' plumcot?. TropAg International Agriculture Conference, Brisbane, Australia, 31 October - 2 November 2022.
Hu, Wei , O'Hare, Tim , Fitzgerald, Melissa , Topp, Bruce and Alam, Mobashwer (2022). The effect of maturity on the concentration of fatty acids in macadamia. TropAg International Agriculture Conference, Brisbane, Australia, 31 October - 2 November 2022.
Hu, W., Fitzgerald, M., Topp, B., Alam, M. and O'Hare, T. (2022). Diversity of omega-7 (palmitoleic acid) content in macadamia nuts and possible biosynthetic pathways influencing its concentration. 3rd International Conference on Food Bioactives & Health, Parma, Italy, 21-24 June 2022. Parma, Italy: MV Congressie.
Poudel, P. D., De-Faveri, J., Shaw, L., Topp, B. and Alam, M. (2022). Genetics and physiology of scion vigour in macadamia. Australasian Plant Breeding Conference, Gold Coast, QLD, Australia, 9-12 May 2022.
Poudel, Pragya Dhakal , Cowan, Max , Topp, Bruce and Alam, Mobashwer (2022). Evaluating seven macadamia seedling and cutting rootstocks for their effect on scion growth. The 2nd International Electronic Conference on Plant Sciences, Online, 1-15 Dec 2021. Basel, Switzerland: MDPI. doi: 10.3390/iecps2021-12040
Wakefield, Sam , Topp, Bruce and Alam, Mobashwer (2022). Crown position and rootstock genotype influence leaf stomatal density in Macadamia sp.. The 2nd International Electronic Conference on Plant Sciences, Online, 1-15 December 2021. Basel, Switzerland: MDPI. doi: 10.3390/iecps2021-11922
Nguyen, Truong Duc , Topp, Bruce and Alam, Mobashwer (2022). Image based phenotyping of shell thickness revealed strong association with kernel recovery in macadamia. The 2nd International Electronic Conference on Plant Sciences, Online, 1-15 December 2021. Basel, Switzerland: MDPI. doi: 10.3390/iecps2021-12037
Kodagoda, Gethmini, Hong, Hung T., Topp, Bruce, Sultanbawa, Yasmina, O'Hare, Tim and Netzel, Michael E. (2021). Does storage improve the phytochemical composition of ‘Queen Garnet Plum’?. Joint virtual Workshop between The ARC Industrial Transformation Training Centre for Uniquely Australian Foods (ARC ITTC UAF), Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Brisbane, Australia and The SARChI Research Programme in Phytochemical Food Network to Improve the Nutritional Quality for Consumers, Tshwane University of Technology, Pretoria, South Africa, Virtual, 24-25 August 2021.
Kodagoda, Gethmini, Hong, Hung, Topp, Bruce, Sultanbawa, Yasmina, O'Hare, Tim and Netzel, Michael E. (2021). Do blood-plums (Prunus salicina) have carotenoids?. 1st Virtual International Conference on Carotenoids (VICC 2021), International Carotenoid Society, Virtual, 22-25 June 2021.
O’Hare, T. J., Hong, H. T., Pun, S., Liu, D., Torrisi, C., Mai, T., Alam, M., Russell, D. and Topp, B. (2020). Macadamia nuts – good fats, bad fats, and biofortification. XXX International Horticultural Congress IHC2018: International Symposium on Fruit and Vegetables for Processing, International Symposium on Quality and Safety of Horticultural Products and VII International Symposium on Human Health Effects of Fruits and Vegetables, Istanbul, Turkey, 12 August 2018. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ACTAHORTIC.2020.1292_50
Mai, Thuy Thi Phuong, Alam, Mobashwer, Henry, Robert, Hardner, Craig and Topp, Bruce (2020). Phylogenetic relationship among Macadamia integrifolia and Macadamia tetraphylla wild accessions. Third International Tropical Agriculture Conference (TROPAG 2019), Brisbane, QLD, Australia, 11–13 November 2019. Basel, Switzerland: M D P I AG. doi: 10.3390/proceedings2019036067
Kodagoda, Gethmini, O'Hare, Tim, Sultanbawa, Yasmina, Topp, Bruce, Hong, Hung and Netzel, Michael (2020). Impact of storage on phytochemicals and sugars in Queen Garnet plum. 2020 Australian Institute of Food Science and Technology (AIFST) Virtual Convention, Online, 23 June - 2 July 2020.
Nunn, Jasmine, Alam, Mobashwer, Akinsanmi, Olufemi, Hardner, Craig and Topp, Bruce (2020). Breeding for resistance to husk spot disease in macadamia. The Third International Tropical Agriculture Conference, Brisbane, QLD Australia, 11-13 November 2019. Basel, Switzerland: MDPI AG. doi: 10.3390/proceedings2019036103
Kodagoda, Gethmini, Topp, Bruce, Sultanbawa, Yasmina, Hong, Hung T., O'Hare, Tim and Netzel, Michael (2020). Assessment of the nutritional quality of Australian grown Plumcot. NSA Brisbane Group’s Virtual Research Showcase Events, Online, 25-26 August 2020.
Kodagoda, Gethmini, Hong, Hung, Topp, Bruce, Sultanbawa, Yasmina, O'Hare, Tim and Netzel, Michael (2019). The effect of storage temperature on the accumulation of anthocyanins in different fruit tissues of Queen Garnet Plum. 4th Queensland Annual Chemistry Symposium QACS 2019, Brisbane, QLD, Australia, 29 November 2019.
Toft, B.D., Hanan, J. S., Topp, B., Auzmendi, I. and Wilkie, J.D. (2018). Can greater understanding of macadamia canopy architecture lay the foundation for orchard productivity improvements?. XI International Symposium on Integrating Canopy, Rootstock and Environmental Physiology in Orchard Systems, Geneva, NY United States, 28 August - 2 September 2016. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/actahortic.2018.1228.7
Toft, B. D., Alam, M. M. and Topp, B. L. (2018). Broad-sense heritability and inter-trait relationships in young macadamia architecture, flowering and yield. International Symposia on Tropical and Temperate Horticulture (ISTTH), Cairns Australia, Nov 20-25, 2016. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/actahortic.2018.1205.75
O’Connor, K.M., Hardner, C.M., Alam, M.M., Hayes, B.J. and Topp, B.L. (2018). Variation in floral and growth traits in a macadamia breeding population. International Symposia on Tropical and Temperate Horticulture (ISTTH), Cairns, QLD, Australia, 20-25 November, 2016. Leuven, Belgium: International Society for Horticultural Science (ISHS). doi: 10.17660/actahortic.2018.1205.77
Alam, M.M., Howell, E., Hardner, C.M. and Topp, B.L. (2018). Variation in precocity in a macadamia breeding population. International Symposia on Tropical and Temperate Horticulture (ISTTH), Cairns, QLD, Australia, 20-25 November, 2016. Leuven, Belgium: International Society for Horticultural Science (ISHS). doi: 10.17660/actahortic.2018.1205.80
Alam, M.M., Neal, J., Howell, E., Russell, D. and Topp, B.L. (2018). ‘MPM1’: a macadamia hybrid showing breakdown of biological rhythm in morphogenesis. International Symposia on Tropical and Temperate Horticulture (ISTTH), Cairns, QLD, Australia, 20-25 November, 2016. Leuven, Belgium: International Society for Horticultural Science (ISHS). doi: 10.17660/actahortic.2018.1205.78
Alam, M. M., Wilkie, J. and Topp, B. L. (2018). Early growth and graft success in macadamia seedling and cutting rootstocks. International Symposia on Tropical and Temperate Horticulture (ISTTH), Cairns, QLD, Australia, 20-25 November 2016. Leuven, Belgium: International Society for Horticultural Science (ISHS). doi: 10.17660/actahortic.2018.1205.79
Howell, E., Russell, D., Alam, M. M. and Topp, B. L. (2018). Variability of initial and final nut set in elite macadamia selections using different pollination methods. International Symposia on Tropical and Temperate Horticulture - ISTTH2016, Cairns, QLD Australia, 20-25 November 2016. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/actahortic.2018.1205.76
Jeff-Ego, O., Akinsanmi, O., Topp, B., Henderson, J. and Drenth, A. (2018). Varietal susceptibility to multiple Phytophthora species in macadamia. International Congress of Plant Pathology (ICPP), Boston MA, United States, July 29-3 August 2018. St. Paul, MN United States: American Phytopathological Societ.
Mai, Thuy, Alam, Mobashwer, Topp, Bruce, Hardner, Craig and Henry, Robert (2017). Searching for extended variability in nut characteristics in wild macadamia gene pool. International Tropical Agriculture Conference TropAg 2017, Brisbane, Australia, 19-20 November 2017. Lausanne, Switzerland: Frontiers.
Mai, Thuy, Alam, Mobashwer, Henry, Robert, Hardner, Craig and Topp, Bruce (2017). Prospects of utilizing wild germplasm for future improvement of macadamia. International Tropical Agriculture Conference TropAg2017, Brisbane, Australia, 20-22 November 2017.
Toft, B., Topp, B. and Alam, M. (2017). Trait mining for high-density macadamia planting systems: how important are more detailed architectural characteristics. International Macadamia Research Symposium, Hawaii, United States, 13-14 September 2017.
Alam, Mobashwer, Hardner, Craig, Nock, Catherine, O'Connor, Katie and Topp, Bruce (2017). Historical and molecular evidence of genetic identity of 'HAES741' and 'HAES660' macadamia cultivars. International Macadamia Research Symposium, Hawaii, United States, 13-14 September 2017.
Alam, Mohammad, Wilkie, John, Kelly, Allison, Hardner, Craig and Topp, Bruce (2017). Genetic diversity and variability in graft success in Australian macadamia rootstocks. International Macadamia Research Symposium, Hawaii, United States, 13-14 September 2017.
Alam, Mobashwer, Neal, Jodi, O'Connor, Katie, Nock, Catherine, Langdon, Kirsty and Topp, Bruce (2017). Morphological and molecular characterization of self-pollinated vs naturally out-crossed progeny of macadamia: a case study of 'HAES741'. International Tropical Agriculture Conference TropAg 2017, Brisbane, Australia, 19-20 November 2017.
O'Connor, Katie, Hayes, Ben, Hardner, Craig, Mobashwer Alam and Topp, Bruce (2017). Indirect prediction of macadamia yield through a genome wide association study of component traits. International Macadamia Research Symposium, Hawaii, United States, 13-14 September 2017.
Topp, Bruce, Hardner, Craig, Alam, Mobashwer, Akinsanmi, Olufemi, O'Connor, Katie, Mai, Thuy and Russell, Dougal (2017). Opportunities and challenges in macadamia breeding. International Macadamia Research Symposium, Hawaii, USA, 13-14 September 2017.
Jeff-Ego, Olumide, Drenth, Andre, Akinsanmi, Olufemi A., Henderson, J and Topp, Bruce (2017). Are multiple Phytophthora species associated with macadamia?. Science Protecting Plant Health - a joint Conference of the Australasian Plant Pathology Society Conference and the Plant Biosecurity Cooperative Research Centre, Brisbane, Australia, 26-28 September 2017.
Jeff-Ego, Olumide, Akinsanmi, Olufemi A., Henderson, J., Topp, Bruce and Drenth, Andre (2017). Early screening for Phytophthora cinnamomi resistance in macadamia trees. TropAg2017, International Tropical Agriculture Conference, Brisbane, Australia, 20-22 November 2017.
Russell, D. M., Neal, J. M., Mayer, R., Bell, D. and Topp, B. L. (2016). Variation of cutting rooting ability in cultivated and wild species of Macadamia. XXIX International Horticultural Congress on Horticulture: Sustaining Lives, Livelihoods and Landscapes (IHC2014), Brisbane, Australia, 17-22 August 2014. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2016.1109.32
Neal, J. M, Russell, D. M, Giles, J. and Topp, B. L. (2016). Assessing nut germination protocols for macadamia cultivar 'Beaumont'. 29th International Horticultural Congress on Horticulture - Sustaining Lives, Livelihoods and Landscapes (IHC) / International Symposium on Nut Crops, Brisbane Australia, Aug 17, 2014. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2016.1109.31
Neal, J. M., Kelly, A., Hardner, C. M., McConchie, C. and Topp, B. L. (2016). Preliminary evaluation of macadamia rootstocks for yield and tree height. 29th International Horticultural Congress on Horticulture - Sustaining Lives, Livelihoods and Landscapes (IHC) / International Symposium on Nut Crops, Brisbane Australia, Aug 17, 2014. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2016.1109.30
Ko, L., Russell, D., Goodrich, B., Berecry, R. and Topp, B. (2016). Molecular tools for improved productivity in Queensland plum orchards. XXIX International Horticultural Congress on Horticulture: Sustaining Lives, Livelihoods and Landscapes (IHC2014), Brisbane, Australia, 17 - 22 August 2014. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2016.1127.44
Topp, B., Hardner, C. M., Neal, J., Kelly, A., Russell, D., McConchie, C. and O'Hare, P. (2016). Overview of the Australian macadamia industry breeding program. XXIX International Horticultural Congress on Horticulture: Sustaining Lives, Livelihoods and Landscapes (IHC2014), Brisbane, Australia, 17 - 22 August 2014. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2016.1127.8
Topp, B., Perez, S., Krolow, D., Correa, E., Russell, D. and Neal, J. (2015). Use of the Mexican peach 'Nieve' for breeding new cultivars in Australia. VIII International Peach Symposium, Matera, Italy, 17-20 June 2013. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2015.1084.14
Russell, D., Bignell, G., Neal, J. and Topp, B. (2015). Testing low chill peaches and nectarines in subtropical and temperate Queensland, Australia. 8th International Peach Symposium, Matera, Italy, 17-20 June 2013. Leuven, Belgium: International Society for Horticultural Science.
Akinsanmi, Olufemi A., Russell, D., Neal J., Drenth A and Topp B. (2015). Prospects of genetic resources for Phytophthora cinnamomi resistance in macadamia. 7th International Macadamia symposium, Kruger National Park, South Africa, 11-13 August 2015. The Southern African Macadamia Growers's™ Association (SAMAC).
Netzel, M. E., Fanning, K., Russell, D., Stanley, R. and Topp, B. (2015). Bioactive anthocyanins in 'Queen Garnet' plum - maturity and bioaccessibility. XXIX International Horticultural Congress: IHC2014, Brisbane, Australia, 17-22 August, 2014. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2015.1106.33
Nock, C. J., Baten, A., Hancock, W., Kawamata, A., Craig Hardner, Bruce Topp, Robert Henry and King, G. J. (2014). In Harvesting the macadamia genome. Plant and Animal Genome XXII Conference, San Diego, 11-15 January 2014.
Netzel, Michael, Bobrich, Anna, Topp, Bruce, Russell, Dougal, Netzel, Gabi, Flanagan, Bernadine, Gidley, Michael and Fanning, Kent (2014). Biofortified produce – Queen Garnet a new high anthocyan plum. 38th Annual Scientific Meeting of the Nutrition Society of Australia, Hobart, TAS, Australia, 26-28 November 2014. Amsterdam, Netherlands: Elsevier. doi: 10.1016/j.jnim.2014.10.065
Netzel, Michael, Fanning, Kent, Netzel, Gabriele, Topp, Bruce, Russel, Dougal and Stanley, Roger (2014). Queen Garnet Plum – a “novel” source of dietary Anthocyanins. Scientific Seminar Series, Nutrition Society of Australia (NSA), QLD Branch, Coopers Plains, QLD, Australia, 15 August 2014.
Netzel, M., Fanning, K., Netzel, G., Edwards, D., Trloar, T., Stanley, Russell, D. and Topp, B. (2013). Breeding high anthocyanin plums for potential health functionality. 5th International Symposium on human health effects of fruits and vegetables (FAV Health 2012), Dharwad, India, 6-10 November 2012.
Fanning, K., Edwards, D., Netzel, M., Stanley, R., Netzel. G., Russell, D. and Topp, B. (2013). Increasing anthocyanin content in queen garnet plum and correlations with in-field measures. 10th International Symposium on Plum and Prune Genetics, Breeding and Pomology, Davis, CA, United States, 20-26 May 2012. Leuven, Belgium: International Society for Horticultural Science.
Topp, B. L., Russell, D. M., Bignell, G. M., Giles, J. E. and Noller, J. M. (2012). Performance of five mume (Prunus mume) cultivars in Southern Queensland, Australia. XXVIII International Horticultural Congress (IHC2010), Lisbon, Portugal, 22-27 August 2010. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2012.938.62
Topp, B. L., Bignell, G. W., Russell, D. M. and Wilk, P. (2012). Breeding low-chill peaches in subtropical Queensland. 7th International Peach Symposium, Lleida, Spain, 8-11 June, 2009. Leuven, Belgium: International Society for Horticultural Science.
Topp, B. L., Hardner, C. M. and Kelly, A. M. (2012). Strategies for breeding macadamias in Australia. IHC2010: 28th International Horticultural Congress on Science and Horticulture for People, Lisboa, Portugal, 22-27 August, 2010. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2012.935.6
Hamill, S., Promchot, S., Bignell, G., Giles, J. and Topp, B. (2009). Vermiculite Improves Early Development and Survival of Low Chill Stone-Fruit Embryos Rescued In Vitro. 6th International Symposium on In Vitro Culture and Horticultural Breeding, Brisbane, Australia, 16 June 2009. Leuven, Belgium: International Society for Horticultural Science.
Hamill, S.D., Beppu, K., Topp, B.L., Russell, D.M. and DeFaveri, J. (2005). Effects of media and fruit ripeness on germination and transplanting of in vitro cultured embryos from low-chill peach and nectarine. International Symposium on Harnessing the Potential of Horticulture in the Asian-Pacific Region, Coolum, QLD, Australia, 1-3 September 2004. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2005.694.23
Nissen, R. J., George, A. P. and Topp, B. L. (2005). Producing super sweet and firm peaches and nectarines. International Society for Horticultural Science. doi: 10.17660/ActaHortic.2005.694.51
Russell, D. M. and Topp, B. L. (2002). Performance of Brazilian stonefruit varieties in a temperate region of Australia. V International Peach Symposium, Davis, CA, United States, *. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2002.592.20
Topp, B.L. and Sherman, W.B. (2000). Breeding strategies for developing temperate fruits for the subtropics, with particular reference to Prunus. XXVth International Horticultural Congress, Brussels, Belgium, 2-7 August 1998. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.2000.522.26
George, A. P., Broadley, R. H., Nissen, R. J., Hamill, S. D. and Topp, B. L. (1999). Breeding strategies for atemoya and cherimoya. 1st International Symposium on Cherimoya, Loja, Ecuador, 16-19 March 1999. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/ActaHortic.1999.497.13
Porter, G. W., Richards, G. D., Topp, B. L. and Sherman, W. B. (1996). Low-chill, non-melting flesh peaches with fresh market and export potential. International Society for Horticultural Science. doi: 10.17660/ActaHortic.1996.374.6
Topp, B. L. and Sherman, W. B. (1995). Plum bacterial spot resistance in leaves and stems measured by a selection index. International Symposium on Cultivar Improvement of Horticultural Crops. Part 2: Fruit Crops, Beijing, China, 6-10 September 1993. Leuven, Belgium: International Society for Horticultural Science. doi: 10.17660/actahortic.1995.403.6
Topp, B. L. and Sherman, W. B. (1990). Location influences on fruit traits of low-chill peaches in Australia. 102nd Annual Meeting of the Florida State Horticultural Society, Tampa, FL, United States, 31 October -2 November 1989. Lake Alfred, FL, United States: Florida State Horticultural Society.
Topp, B. L. and Sherman, W. B. (1990). Potential for low chill Japanese plums in Florida. 103rd Annual Meeting of the Florida State Horticultural Society, Florida, 1990. Lake Alfred, FL, United States: Florida State Horticultural Society.
Sherman, W. B., Topp, B. L. and Lyrene, P. M. (1990). Non-melting flesh for fresh market peaches. 103rd Annual Meeting of the Florida State Horticultural Society, Florida, 1990. Lake Alfred, FL, United States: Florida State Horticultural Society.

Data Collections

Topp, Bruce, Alam, Mobashwer and O'Connor, Katie (2021). Historical yield data_Katie_PhD_GS. The University of Queensland. (Dataset) doi: 10.14264/5f8abc3
Topp, Bruce, Alam, Mobashwer and Mai, Thuy (2018). DArTseq markers of wild macadamia species. The University of Queensland. (Dataset) doi: 10.14264/uql.2018.395
Topp, Bruce and Alam, Mobashwer (2018). DArTseq based silicoDArT and SNP data. The University of Queensland. (Dataset) doi: 10.14264/uql.2018.394
Topp, Bruce, O'Connor, Katie and Alam, Mohammad (2018). SNPs and silicoDArT markers of B1.2 progeny and parents. The University of Queensland. (Dataset) doi: 10.14264/uql.2018.491

Newspaper Articles

Topp, Bruce, Russell, Dougal and Howell, Eddie (2016, 05 01). Using a Mexican peach for breeding new cultivars in Australia Australian Stonefruit Grower 14-17.
Bignell, Grant, O'Hare, Paul and Topp, Bruce (2016, 05 01). Macadamia Breeding Progeny Trials: What Did We Learn? Horticulture Innovation Australia 68-69.