Seven parents of cowpea (Co 3. Co 4, V 87, KC 199. C 152, KC 195 and CoVu 4) and their twelve F hybrids were evaluated for stability parameters with respect to grain yield in six environments. Pooled analysis of variance revealed that genotypes and environment were significant for grain yield. Mean square due to pooled deviation was non significant. indicating the absence of non-linear portion of genotype x environment interaction The mean square due to linear component was significant for grain yield. The parent Co 4 and the hybrids Co 4 x C 152, Co 4 x KC 195. V 87 x CoVu 4 and KC 199 x C 152 which were stable for grain yield can be utilised in the development of high yielding stable lines,
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Tamil Nadu Agricultural University
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Tamil Nadu, India.
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Agricultural Students Union
Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.
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