MORPHOMETRICÂ DIVERSITY OF RABI SORGHUM
GERMPLASM LINES
D. SHIVANI AND CH. SREELAKSHMI
Agricultural Research Station, Tandur
(E mail: rishith_sree@rediffmail.com)
(Received: 7 August 2013; 23September 2013)
SUMMARY
Hundred rabi sorghum genotypes grown at Agricultural Research Station, Tandur, ANGRAU, A.P. during rabi 2011-12 were observed for eight different morphological characters and the data were subjected to analysis of variance. Significant differences were recorded among the genotypes with regard to different morphological characters. Eighty genotypes of rabi sorghum were grouped into fourteen clusters following the Tocher’s method of clustering analysis utilizing data on a set of yield and its component characters. Cluster X and XI formed individual clusters and had the maximum genetic divergence. Maximum inter cluster value was observed between clusters XI and VI followed by VI and IX which indicated that the genotypes included in these clusters may give heterotic response and thus better segregants. The lines derived from the same source of parentage were grouped into different clusters demonstrating the impact of selection pressure in increasing genetic diversity.
Keywords: Rabi sorghum, morphological characters, clustering analysis and genetic divergence.