NDLI: First use of microsatellite markers in a large collection of cultivated and wild accessions of tepary bean (Phaseolus acutifolius A. Gray)

Content Provider	Springer Nature Link
Author	Blair, Matthew W. Pantoja, Wilfredo Carmenza Muñoz, L.
Copyright Year	2012
Abstract	Tepary bean (Phaseolus acutifolius A. Gray) is a dry-land crop species that originated in the deserts of Mexico and the south-western United States and therefore is proposed as a source of drought and salt tolerance for related species and for production in marginal rainfall areas. Few genetic tools have been developed or tested for tepary bean but microsatellites from common bean are an obvious choice for diversity analysis in the crop. The first goal of this study was to validate a set of gene-derived and non-gene simple sequence repeat or microsatellite markers from common bean in tepary bean cultivars and wild relative accessions. The second and more extensive objective of this study was to evaluate the genetic diversity and population structure of the tepary bean accessions to determine if leaf-morphology variants are valid as separate sub-groups of wild tepary beans; if P. parvifolius exist as a separate variants or species; and if cultivated tepary beans originated from one domestication event or several events. Our analysis of 140 tepary bean genotypes showed that a single domestication was likely as the cultivars were most closely related to accessions from Sinaloa and northern Mexico and that diversity was much higher in the wild genotypes compared to the cultivated ones. Other results were that P. parvifolius was classified as a separate species by population structure analysis while the variants P. acutifolius var. acutifolius and var. tenuifolius were admixed and inter-crossed. P. latifolius is not a valid species or variant of P. acutifolius but represents a group of cultivars within tepary bean. This is the first analysis of microsatellite diversity in tepary beans and has implications for breeding and conservation of this crop and its wild relatives.
Starting Page	1137
Ending Page	1147
Page Count	11
File Format	PDF
ISSN	00405752
Journal	Theoretical and Applied Genetics
Volume Number	125
Issue Number	6
e-ISSN	14322242
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-06-08
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biochemistry Plant Biochemistry Agriculture Plant Breeding/Biotechnology Plant Genetics & Genomics Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Biotechnology Agronomy and Crop Science

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