Cluster and Correlation Analysis in Blackgram (Vigna mungo L.)Genotypes under Drought
Author:V.A. Mohanlal*, K. Saravanan and T. Sabesan
In this study, twenty-one blackgram genotypes were screened under drought stress condition
and non-stress condition during Jan-2018 at Plant Breeding farm, Annamalai University to study
the genetic diversity and correlation. Eleven yield and yield related traits and two physiological
traits were recorded for the statistical analysis. In cluster analysis, the genotypes were grouped
into four clusters both in stress and non-stress condition. Clusters II and III (7) and cluster IV (8)
had highest number of genotypes in stress and non-stress condition respectively. Highest cluster
mean for seed yield per plant was recorded in cluster I (0.71 g) under stress situation and cluster
II (5.05 g) in non-stress condition. Pearson correlation analysis under stress condition revealed
that the characters plant height, number of branches, clusters per plant, pods per plant, pod
length and seeds per pod had positive significant association with seed yield per plant while, pod
weight, chlorophyll-a, chlorophyll-b and total chlorophyll had significant negative correlation with
seed yield per plant. Plant height and seeds per pod recorded significant positive association
with seed yield per plant under non-stress condition. .
Key Words: Blackgram, Drought, Yield, Chlorophyll.