Genetic structure of wild bean populations in their South-Andean centre of origin

The genetic structure of wild common bean populations was studied in the South-Andean centre of origin of the species. Plants were collected from 21 populations in Argentina and genetic variability was assessed for molecular and resistance markers. Polymorphism was weak for phaseolin, the major seed...

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Bibliographic Details
Published in:Theoretical and applied genetics 1998-05, Vol.96 (6/7), p.844-851
Main Authors: Cattan-Toupance, I, Michalakis, Y, Neema, C
Format: Article
Language:English
Subjects:
Beans
biochemical polymorphism
Biological and medical sciences
biomarkers
centers of origin
Classical genetics, quantitative genetics, hybrids
Colletotrichum lindemuthianum
disease resistance
Fundamental and applied biological sciences. Psychology
fungal diseases of plants
Genetic aspects
Genetics
Genetics of eukaryotes. Biological and molecular evolution
Legumes
Mimosaceae
phaseolin
Phaseolus vulgaris
phenotype
Physiological aspects
Plant genetics
population
Population genetics
Pteridophyta, spermatophyta
random amplified polymorphic DNA technique
seeds
Vegetals
wild plants
wild populations
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Summary:The genetic structure of wild common bean populations was studied in the South-Andean centre of origin of the species. Plants were collected from 21 populations in Argentina and genetic variability was assessed for molecular and resistance markers. Polymorphism was weak for phaseolin, the major seed-storage protein, and for RAPD markers, while a high level of polymorphism was observed for resistance to anthracnose, one of the most important diseases of common bean. For the three traits, within-population variability was important and represented between 43.6% and 67.5% of the total variation. Although among-population differentiation was significant for all the traits, no correlation was found between the population distances calculated from RAPDs and resistance. These results indicate that pathogen selection pressure may be an important factor influencing the distribution of variability within and among host plant populations.
ISSN:0040-5752
1432-2242
DOI:10.1007/s001220050811