Genetic Diversity of Bolivian Accessions of Phaseolus Species Evaluated with Fluorescent Microsatellite Markers

ABSTRACT The Andes of South America is a center of origin for common beans (Phaseolus vulgaris L.) and lima beans (P. lunatus L.) that has been less well studied than other regions due to its high diversity and multitude of subenvironments. The objective of this study was to evaluate 174 accessions...

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Bibliographic Details
Published in:	Crop science Vol. 52; no. 6; pp. 2619 - 2627
Main Authors:	Blair, Matthew W., Dávila, Andrea M., Reyes, Ximena, Ávila, Teresa
Format:	Journal Article
Language:	English
Published:	Madison, WI The Crop Science Society of America, Inc 01-11-2012 Crop Science Society of America American Society of Agronomy
Subjects:	Agricultural production Agronomy. Soil science and plant productions Beans Biological and medical sciences Classical and quantitative genetics. Population genetics. Molecular genetics Collections Fundamental and applied biological sciences. Psychology Gene banks Generalities. Genetics. Plant material Genetic diversity Genetic resources, diversity Genetics and breeding of economic plants Genotypes Indigenous species Molecular genetics Multiculturalism & pluralism Plant material Seeds Studies Bolivia Peru Fluorescent tracer Leguminosae Dicotyledones Microsatellite DNA Angiospermae Spermatophyta Genetic diversity Molecular marker Phaseolus
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Summary:	ABSTRACT The Andes of South America is a center of origin for common beans (Phaseolus vulgaris L.) and lima beans (P. lunatus L.) that has been less well studied than other regions due to its high diversity and multitude of subenvironments. The objective of this study was to evaluate 174 accessions from five Phaseolus species native to Bolivia to determine their relationships and total genetic diversity using a set of 36 fluorescent microsatellite markers that are highly polymorphic and differentiate both between and within species. The results showed that the common beans were divided into a range of Andean groups and one disperse group of Mesoamerican accessions. The other species were well differentiated, including two scarlet runner beans (P. coccineus L.), 22 lima beans, and wild relatives P. augusti Harms and P. bolivianus Piper. Within the Andean groups, accessions with bicolor seeds were frequent and were typical of race Peru, subgroup I. These “vaquita” type beans were different from other subrace Peru genotypes without bicolor seeds and were also different from type I growth habit beans from race Nueva Granada. This latter race was unexpected for the region as it is from the northern Andes but occurred with some frequency in Bolivia. The diversity of Phaseolus beans found in Bolivia is high with implications on germplasm conservation and the source of diversity in the Andean gene pool and in surrounding countries.
Bibliography:	All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permission for printing and for reprinting the material contained herein has been obtained by the publisher.
ISSN:	0011-183X 1435-0653
DOI:	10.2135/cropsci2012.01.0034