Genetic divergence over environments in sorghum [Sorghum bicolor (L.) Moench]
2007
Narayan, Ashish | Shrotria, P.K.
Twenty-four sorghum genotypes were studied in three environments, viz., early sowing (E1), timely sowing (E2) and late sowing (E3), to know the influence of Genotype × Environment (G × E) interaction over genetic diversity. Considerable genetic diversity was recorded in the material. The environment influenced clustering pattern of the genotypes. The mean values for different traits varied from environment to environment, which indicated the impact of different environments on the gene expression and ultimate effect on phenotypic expression for producing diversity among the genotypes. The intra and inter cluster distances also varied in magnitude with different environments. Average was higher in E1 (early sown) and E2 (timely sown) as compared to E3 (late sown) environment. Some genotypes were found to be occupying consistently the same cluster in two different environments indicating their stability. It is revealed that for better understanding of genetic diversity present among the genotypes, they should be tested in variable environments.
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