GENETIC DIVERSITY ESTIMATION FOR POD AND SEED QUALITY TRAITS IN BUSH TYPE FRENCH BEAN (Phaseolus vulgaris L.) ACCESSIONS
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Date
2019-09-03
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University of Agricultural Sciences, Bengaluru
Abstract
French bean is an important grain legume grown for its green pods and dry seeds.
The present study on diversity estimation for pod and seed quality characters was carried
out on thirty French bean accessions along with check varieties based on morphological
characters and SSR markers. The accessions IC329154, EC500474, EC559576 and
EC283179 showed higher number of fresh pods per plant and total fresh pod weight. The
accessions EC500474, EC530843, EC512801 and IC311676 showed higher number of
dry pods per plant, seeds per pod and seed length. Majority of the accessions showed
slightly curved pods with pear shaped pod cross section and all the accessions possessed
string. In majority of the accessions seed shape observed was truncate fastigiated and
exhibited varying seed coat pattern. The dominant pod colour was yellow green and
dominant seed coat colour was orange white. The SSR markers, BM175 and BM164
exhibited higher polymorphism among the accessions and varieties. The PIC value
ranged from 0.19-0.36. Dendrogram constructed to assess the genetic diversity among
French bean accessions and varieties using SSR marker data grouped accessions into two
major clusters. The accessions mentioned above can be used in the breeding programme,
for pod and seed quality traits.
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