Genetic variability and heritability studies in garden pea (Pisum sativum L.)

摘要

The critical assessment of the nature and magnitude of variability in the available germplasm is the prerequisite to any breeding programme. The efficiency of selection and development of improved varieties solely depends on the nature and extent of variability expressed for yield and related characters in the genepool. Selection based on phenotypic variability alone may not be a rational method, since the phenotypic variation is the result of the genotypic value, the effect of environment and genotype-environmental interaction. Hence, an attempt was made to assess the available genetic variability in garden pea by partitioning of overall variability into its heritable and non-heritable components and genetic parameters like genotypic coefficient of variation (GCV), phenotypic coefficient of variation (PCV), heritability and expected genetic advance so as to help in developing superior genotype.