Comparision of cluster formation by mahalanobis’ D2 and metroglyph analyses in groundnut (Arachis Hypogaea L.).
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Date
2012-01
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Abstract
Fifty genotypes of groundnut were classified into five and seven clusters in D2 and
Metroglyph methods of analyses respectively. Harvest Index and 100-seed weight were the main contributors
to total divergence as per metroglyph analysis. The characters on X and Y axes in scattered metroglyph
diagram determine the grouping of genotypes, hence it poses a problem for judicious selection of these
characters. The comparative study of these methods indicated that metroglyph analysis would be suitable for
preliminary grouping when large number of genotypes are considered at a time. The differences between the
two methods, the number of clusters formed, inter cluster distance, characters considered for grouping and
superimposition of genotypes within the cluster indicated that D2 analysis was more effective compared to
metroglyph analysis.
Description
Keywords
Groundnut, Genetic divergence, D 2 Analysis, Metroglyph analysis
Citation
Kumar Dandu Ravi, Sekhar M Reddi, Reddy K Raja, Ismail S. Comparision of cluster formation by mahalanobis’ D2 and metroglyph analyses in groundnut (Arachis Hypogaea L.). International Journal of Applied Biology and Pharmaceutical Technology. 2012 Jan-Mar; 3(1): 395-399.