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Genetic diversity of the Australian National Mango Genebank

Dillon, N. L. and Bally, I. S. E. and Wright, C. L. and Hucks, L. and Innes, D. J. and Dietzgen, R. G. (2013) Genetic diversity of the Australian National Mango Genebank. Scientia Horticulturae, 150 . pp. 213-226. ISSN 0304-4238

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Article Link(s): http://dx.doi.org/10.1016/j.scienta.2012.11.003

Abstract

Assessment of genetic diversity is an essential component in germplasm characterisation and utilisation. In this study the genetic diversity of mango was determined among 254 Mangifera indica L. accessions and related Mangifera species originating from 12 diverse geographic areas using eleven known simple sequence repeat (SSR) markers from mango. A total of 133 alleles were detected, ranging from eight (LMMA12) to 16 (MIAC-5) alleles per locus with a mean value of 12.36 and an average polymorphism information content (PLC) of 0.72. The mean number of alleles (8.45) was highest in the South East Asian accessions (Indonesia/Malesia) and lowest in the accessions from the Philippines (2.55). Diversity analysis divided the accessions into four major nodes broadly representing their geographical origins. The genetic diversity of 'Kensington Pride' was confirmed as being very low and no parents for this cultivar were identified. No association could be established between SSR markers analysed and embryony. Ten synonymous accessions were identified with matching genetic identity with at least one other accession at all SSR loci examined. Twenty-two unique genotypes were identified for 50 trees previously assigned different accession names. The remaining accessions were genetically distinct from each other. This increased understanding of genetic diversity in the Australian National Mango Genebank will assist breeders to better select parents with the potential to contribute desired genes to the progeny and thus more rapidly deliver improved cultivars to industry to meet consumer demand. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

Item Type:Article
Business groups:Horticulture and Forestry Science
Additional Information:Dillon, Natalie L. Bally, Ian S. E. Wright, Carole L. Hucks, Louise Innes, David J. Dietzgen, Ralf G. Agri-Science Queensland, a Division of the Department of Agriculture, Fisheries and Forestry; Mango Fruit Genomics Initiative We thank Dr. Emma Mace and Kirsten Sakrewski (Hermitage Research Station, Warwick) and Dr. Mandy Christopher (Leslie Research Station, Toowoomba) for CEQ 8800 PCR product separation and analysis. We also acknowledge Dr. Katharina Shulte, Australian Tropical Herbarium, James Cook University, Cairns, for assistance with Splitstree4 analysis. We acknowledge funding for this work as part of the Mango Fruit Genomics Initiative supported by Agri-Science Queensland, a Division of the Department of Agriculture, Fisheries and Forestry (formerly the Department of Employment, Economic Development and Innovation). Elsevier science bv Amsterdam
Keywords:Mangifera Simple sequence repeats Microsatellite markers Genetic variability Fingerprinting Bayesian method mangifera-indica l. multilocus genotype data fragment length polymorphism rapd markers microsatellite markers geographic differentiation phylogenetic-relationships embryo type cultivars identification
Subjects:Plant culture > Fruit and fruit culture
Science > Botany > Genetics
Deposited On:08 Oct 2014 23:44
Last Modified:08 Oct 2014 23:44

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