volume 32 issue 4 (december 2009) : 250-254
GENETIC DIVERGENCE IN COWPEA [VIGNA UNGUICULATA (L.) WALP.]
1Department of Agricultural Botany, College of Agriculture,
Junagadh Agricultural University, Junagadh-362 001, India.
ABSTRACT
A field experiment was conducted with 60 genotypes of cowpea to study the diversity among
the genotypes which were grouped in to 12 clusters revealing the presence of considerable diversity
in the material. The clustering pattern of the varieties usually did not confirm to geographical
distribution. Inter cluster distance and mean cluster character values indicated that hybridization
of cluster-X variety (JCPL-134) with cluster-IV varieties (JCPL-1, JCPL-13 and JCPL-21) and
cluster-V varieties (JCPL-50 and JCPL-133) with cluster-III varieties (JCPL-26 and JCPL-131)
would exhibit high heterosis and also result in transgressive segregants with higher yield. It was
also noted that genotypes of cluster-X which had higher cluster mean values for yield and other
desired characters like leaf area, ten pods weight, number of pods per plant and green pod yield
per plant etc. could be directly tested in multilocation trials for their suitability or could be used
as a donor parent in breeding programme. The characters like plant height, green pod yield per
plant, protein content and leaf area were found to contribute much to the total genetic divergence
in cowpea.
the genotypes which were grouped in to 12 clusters revealing the presence of considerable diversity
in the material. The clustering pattern of the varieties usually did not confirm to geographical
distribution. Inter cluster distance and mean cluster character values indicated that hybridization
of cluster-X variety (JCPL-134) with cluster-IV varieties (JCPL-1, JCPL-13 and JCPL-21) and
cluster-V varieties (JCPL-50 and JCPL-133) with cluster-III varieties (JCPL-26 and JCPL-131)
would exhibit high heterosis and also result in transgressive segregants with higher yield. It was
also noted that genotypes of cluster-X which had higher cluster mean values for yield and other
desired characters like leaf area, ten pods weight, number of pods per plant and green pod yield
per plant etc. could be directly tested in multilocation trials for their suitability or could be used
as a donor parent in breeding programme. The characters like plant height, green pod yield per
plant, protein content and leaf area were found to contribute much to the total genetic divergence
in cowpea.
KEYWORDS
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