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Historical and Molecular Evidence of Genetic Identity of Macadamia Cultivars HAES741 and HAES660

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Alam, M., Hardner, C., Nock, C., O'Connor, K. M. and Topp, B. L. (2019) Historical and Molecular Evidence of Genetic Identity of Macadamia Cultivars HAES741 and HAES660. HortScience horts, 54 (4). pp. 616-620. ISSN 0018-5345


Article Link: https://doi.org/10.21273/HORTSCI13318-18

Publisher URL: https://journals.ashs.org/hortsci/view/journals/hortsci/54/4/article-p616.xml


The Hawaiian cultivars Keaau (HAES660) and Mauka (HAES741) were selected by the University of Hawaii—released in 1966 and 1977, respectively—and have been used extensively in macadamia orchards throughout the world. Recent molecular evidence suggests that these two cultivars are almost identical genetically; however, commercially they have been considered phenotypically different. This study reviews available molecular, historical, and phenotypic evidence to examine the hypothesis that these two cultivars are the same genotype. Phenotypic variability for morphological traits was observed in a replicated trial at Wolvi, QLD. Historical evidence suggests that both ‘HAES660’ and ‘HAES741’ were derived from the same orchard. We identified strong genetic and phenotypic similarities between these cultivars, with variability in some simple traits. This study provides evidence that these two cultivars are isogenic or near isogenic and may have been derived from the same plant source.

Item Type:Article
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Horticulture and Forestry Science
Keywords:Macadamia integrifolia; varietal characteristics; DArT; SSR; phenotypic variability
Subjects:Science > Botany > Genetics
Plant culture > Tree crops
Plant culture > Food crops
Plant culture > Fruit and fruit culture > Nuts
Live Archive:03 Jan 2024 23:22
Last Modified:19 Jan 2024 00:23

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