The characterization of 41 common bean cultivars and landraces from breeding
collection of Institute of Field and Vegetable Crops, Novi Sad, Serbia, was
done based on phenotypic traits and microsatellite markers. Phenotypic
traits were chosen from Bioversity International descriptor list. In
addition, main yield components were investigated. Analysis of phaseolin
type revealed affiliation of cultivars and landraces to Mesoamerican or
Andean gene pool. Cultivars and landraces demonstrated significant diversity
level with regard to studied phenotypic traits. Identified variation showed
high potential for developing new cultivars with desirable combination of
traits. Principal component analysis based on phenotypic traits separated
bean cultivars and landraces in two groups, which corresponded to
Mesoamerican and Andean determined according to phaseolin type. Putative
hybrids, with combination of traits between gene pools were also identified.
Analysis of microsatellite data, using twenty-two SSR primer pairs, showed
medium gene diversity in studied material. Microsatellite-based cluster
analysis separated genotypes in two discrete clusters and several
subclusters. No clear separation according to gene pool was found between
the clusters, however grouping according to gene pool and patterns of
phenotypic variation, following these gene pools, were observed within
subclusters. Knowledge on detailed relationships of cultivars and landraces
based on phenotypic and molecular data would facilitate identification of
candidates for future breeding.
The molecular genetics of the bithorax complex of Drosophila: characterization of the products of the Abdominal-B domain.
