Studies on Genetic Divergence for Yield, Yield Components and Quality Traits in Peanut (Arachis hypogaea L.)

Forty groundnut genotypes were evaluated for their genetic diversity with regards to pod yield, yield attributing characters and oil content. The genotypes were classified into eight clusters, based on Mahalanobis D2 statistic. Geographical origin, habit group and genetic diversity were observed to...

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Bibliographic Details
Published inEnvironment and ecology Vol. 40; no. 3; p. 1053
Main Authors Sudhishna, E, Srinivas, T, Ramesh, D, Tushara, M
Format Journal Article
LanguageEnglish
Published Kalyani MKK Publications 01.07.2022
Subjects
Arachis hypogaea
Clusters
Divergence
Flowering
Genetic diversity
Genotypes
Hybridization
Kernels
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Summary:Forty groundnut genotypes were evaluated for their genetic diversity with regards to pod yield, yield attributing characters and oil content. The genotypes were classified into eight clusters, based on Mahalanobis D2 statistic. Geographical origin, habit group and genetic diversity were observed to be unrelated, as genotypes from the same center and habit group were grouped into different clusters. Results on inter-cluster distances revealed maximum diversity between genotypes of cluster II and VIII. Intra-cluster distance was maximum for cluster II, indicating the existence of high variability within the cluster. A perusal of the results on cluster means revealed early flowering, early maturity and highest sound mature kernel per cent for cluster VII; low mean for number of immature pods, highest mean performance for primary branches per plant, dry pod yield, fresh pod yield and high oil content for cluster V; Low plant height for the cluster, VI; high mean for mature pods and shelling per cent for cluster III; and more number of secondary branches and high 100 kernel weight for cluster II; indicating the importance of selection of genotypes from the corresponding clusters in hybridization programs for effecting improvement of the respective traits. Further, secondary branches per plant was observed to contribute maximum, followed by 100 kernel weight towards the total divergence of the genotypes studied in the present investigation.
ISSN:0970-0420