GENETIC VARIABILITY FOR SEED YIELD, DROUGHT RELATED TRAITS AND RESPONSES TO POWDERY MILDEW IN BLACKGRAM (Vigna mungo L. hepper)
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Date
41839
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University of Agricultural Sciences GKVK, Bangalore
Abstract
Availability of genetic variation for productivity per se traits and responses to
economically important production constraints in the working germplasm is a
prerequisite for breeding crops and blackgram is no exception to this. The total of 116
blackgram germplasm accessions along with two checks were evaluated in augumented
design during Kharif 2013 at ‘K’ block, UAS ,Bangalore. Data were collected on 12
quantitative traits and responses to powdery mildew under natural infection. The data
were also evaluated for root traits in PVC pipes during 2014 summer. Broad-sense
heritability as well as expected GAM was higher for 50 % flowering, SPAD, SLA, plant
height, seed yield plant-1, pod yield plant-1, pods plant-1and 100 seed weight .The
accessions were grouped into five clusters based on K-means clustering. Quantitative
traits mean differences between five clusters were significant for seven out of 12
quantitative traits. The average days to 50 % flowering, pods plant-1, seed yield plant-1,
pod yield plant-1 and SLA were highest among the accessions included in (II and V)
clusters. The accessions IC-436811, IC-436922, IC-436772 and AKU-7-1 were early to
flowering and LBG-685, IC-436784, IC-436753, IC-282006 and AC.43 manifested high
seed yield potential. K-5-572 and LBG-645 genotypes were found highly resistant to
powdery mildew. The accessions differed significantly for all the root traits and could be
grouped into five clusters based on K-means clustering. The root traits means and
variances of accessions included in the five clusters differed significantly The genotype
LBG-685 manifested higher grain yield coupled with maximum root length.
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Keywords
planting, yields, diseases, genetics, sowing, vegetative propagation, genotypes, biological phenomena, developmental stages, germplasm