Studies on path coefficient analysis and genetic divergence in rice(Oryza sativa L.)
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Date
1986
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Birsa Agricultural University, Ranchi
Abstract
The present investigation was carried out to study the extent of variability, heritability and expected genetic advance of 169 genotypes of indica rices for ten quantitative characters viz., total tillers per plant, number of effective tillers per plant, days to 50 per cent flovering, plant height, paniele length, number of primary branches per panicle, number. of grains per panicle, biological yield por plant, 100-grain weight and grain yield per plant. The phenotypie and genotypic orrelations of aforesaid characters 4th grain yield and among themselves vere ascertained. Path coefficient analysis was carried out for determination of the direction and magnitude of the specific sources acting to produce the given correlation response. Mahal anobis's D²-statistics was utilized in quantifying the amount of genetic diversity.
The analysis of variance of the above mentioned ten characters showed that the genotypes differed significantly among themselves for all the ten characters. A wide range of phenotypic variability was observed in number of grains por panicle, plant height, biological yield per plant and days to 50 por cont flowering. Moderate to low phenotypic variance vas found for grain yield por plant, total tillers per plant, effective tillers per plant, panicle length, number of primary branches per panicle and 100-grain weight. Genotypie variance