Abstract
Germplasm characterization is essential to utilize and improve plant genetic resources in various breeding programs. The present study was aimed to characterize genetic variation in 28 accessions of yardlong bean (Vigna unguiculata (L.) Walp. subsp. sesquipedalis Verdc.) collected from different states of India. A total of 48 random amplified polymorphic DNA markers were examined to generate binary data profiles, out of these 31 markers were informative with scorable and reproducible banding patterns. 100% polymorphism was attained across the genotypes with total 2447 amplicons. Among these, OPC8 was highest with outcome of 160 amplicons, OPS7 and OPD5 followed with 149 and 144 amplicons. The polymorphic information content value among the genotypes varied from 0.23 to 0.93. Jaccard’s similarity coefficient ranged from 0.063 to 0.942 explaining wide genetic base. Dendrogram constructed by Unweighted Pair Group Method with Arithmetic Averages method classified 28 genotypes into 5 major clusters. Cultivar IC-582860 was found to be unique due to its least similarity with other genotypes. IC-582850 and IC-582875 showed highest similarity with (94%). Correlation study among morphological traits also revealed highly positive correlation between seed protein content with pod length; 100 seed weight with pod length and seed protein content; pod yield with number of pods per cluster and number of pods per plant. Thus the present study reveals discrimination, characterization and differentiation of yardlong bean by explaining genetic variation between and within the genotypes. This may further useful for genome mapping, crop improvement and to develop new plant varieties with high yield and pod quality in yardlong bean.
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The authors gratefully acknowledge the financial and laboratory support provided by College of Horticulture, Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabad-30.
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Pidigam, S., Munnam, S.B., Nimmarajula, S. et al. Assessment of genetic diversity in yardlong bean (Vigna unguiculata (L.) Walp subsp. sesquipedalis Verdc.) germplasm from India using RAPD markers. Genet Resour Crop Evol 66, 1231–1242 (2019). https://doi.org/10.1007/s10722-019-00782-w
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DOI: https://doi.org/10.1007/s10722-019-00782-w