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Expressed Sequence Tag-Simple Sequence Repeat (EST-SSR) Marker Resources for Diversity Analysis of Mango (Mangifera indica L.)

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Dillon, N. L., Innes, D. J., Bally, I. S.E., Wright, C. L., Devitt, L. C. and Dietzgen, R. G. (2014) Expressed Sequence Tag-Simple Sequence Repeat (EST-SSR) Marker Resources for Diversity Analysis of Mango (Mangifera indica L.). Diversity, 6 (1). pp. 72-87.

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Article Link(s): http://dx.doi.org/doi:10.3390/d6010072

Organisation URL: http://www.mdpi.com/1424-2818/6/1/72/pdf‎

Abstract

In this study, a collection of 24,840 expressed sequence tags (ESTs) generated from five mango (Mangifera indica L.) cDNA libraries was mined for EST-based simple sequence repeat (SSR) markers. Over 1,000 ESTs with SSR motifs were detected from more than 24,000 EST sequences with di- and tri-nucleotide repeat motifs the most abundant. Of these, 25 EST-SSRs in genes involved in plant development, stress response, and fruit color and flavor development pathways were selected, developed into PCR markers and characterized in a population of 32 mango selections including M. indica varieties, and related Mangifera species. Twenty-four of the 25 EST-SSR markers exhibited polymorphisms, identifying a total of 86 alleles with an average of 5.38 alleles per locus, and distinguished between all Mangifera selections. Private alleles were identified for Mangifera species. These newly developed EST-SSR markers enhance the current 11 SSR mango genetic identity panel utilized by the Australian Mango Breeding Program. The current panel has been used to identify progeny and parents for selection and the application of this extended panel will further improve and help to design mango hybridization strategies for increased breeding efficiency.

Item Type:Article
Business groups:Crop and Food Science, Horticulture and Forestry Science
Keywords:expressed sequence tag; simple sequence repeat; microsatellite; molecular marker; genetic diversity; cultivar identification
Subjects:Plant culture > Fruit and fruit culture
Science > Biology > Genetics
Deposited On:02 Jul 2014 03:18
Last Modified:19 Dec 2022 01:40

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