OAR@ICRISATPattern analysis for genotype by environment effects for seed weight and grain yield in pigeonpea hybridsK BSaxenaauthorRRainaauthorGenotype by environment interaction effects (GE) were assessed for seed weight and grain yield of 12 pigeon pea genotypes (ICPH 8, ICPH 11, ICPH 13, ICPH 15, ICPH 16, ICPH 22, ICPH 149, ICPH 328, UPAS 120, Manak, Pusa 33 and CO 5) tested in 11 environments in India (Andhra Pradesh, Maharashtra and Haryana). Pattern analysis was applied to identify the grouping of genotypes and environments. For seed weight, the genotype grouping was mostly based on the genetic make-up of the hybrid or pure line. The environment did not reflect any specific pattern. For grain yield, hybrids and pure lines responded differently as separate groups, and hierarchical separations reflected the mean performance of genotypes. Environmental and genotype groupings revealed a distinct pattern of GE interaction based on soil types. Black and non-black soil environments emerged as two distinct groups discriminating genotypes differently. Hybrids and controls showed specific adaptation to particular environments, emphasizing the need to breed for location-specific hybrids and select testing sites and controls carefully.Pigeonpea2001Article

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