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International Research Journal of Plant Science

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Correlation, path-coefficient and genetic diversity in Blackgram [Viginamungo (L) Hepper]

Abstract

Reena Mehra, A.N Tikle, Ashok Saxena, Ashok Munjal, Rekhakhandia and Mahipal Singh

An experiment was carried out during the Kharifseason of 2011-12 at the research field of RAK College of Agriculture, Sehore (M.P.) to assess the correlation, path coefficient and genetic diversity in 75 morphologically diverse accessions of Blackgram [Vignamungo (L) Hepper].In present study Plant height, Pods per plant, seeds per plant and 100-seed weight exhibited significant and positive correlation with seed yield bothat genotypic and phenotypic level. The degree of association was highest between seeds per plant and seed yield per plant followed by pods per plant, biological yield per plant, plant height and 100 seed weight. Correlation studies indicated that seed yield per plant showed significant positive correlation with seeds per plant, pods per plant, biological yield per plant, plant height and 100 seed weight. Path coefficient analysis revealed that highest positive direct effect was shown by seeds per plant followed by biological yield per plant on the seed yield both at phenotypic and genotypic levels.Seventeen clusters were formed using D2 analysis and maximum of 13 genotypes were found in cluster thirteen. Clustering pattern revealed that genetic diversity was directly related to geographic diversity. Among the genotypes studied,RBU 38, CBG 757, NDU 5-3, COBG 761, TP```U 05-13, KKB 20055, KPU 07-06, RUG 1, PU 06-20 and VBG 04-008 had potential for higher yield based on the genetic merit of yield factors, and are selected for further study for eventual release as varieties for farmers. Additionally,These genotypes also can used in genetic enhancement program to generate trangressive segregants since they were genetically diverse lines.

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