Assessment of yield stability and ecovalence in egg plant

摘要

45 egg plant inbred lines were evaluated in three environments for yield per plant, plot yield, fruit weight, fruit length, fruit breadth, fruit firmness, days to flowering, number of branches, plant spread and plant height. The stability analysis indicated that significant G X E interactions for all the attributes revealed that the genotypes had the divergent linear response to environmental change while, significant pooled deviation suggests that deviation from linear regression also contributedsubstantially towards the differences in the stability of genotype. Further, linear and non-linear components contributed significantly to the differences in stability among the genotypes tested. Environmental indices revealed that El is the most favourable environment as the least number of attributes recorded negative trend in their expression. The insight of stability analysis revealed that the inbred line CH 303 (xi=1.71 kg, bi=1.60 and s~2di=0.01) showed supremacy in yield and stable for favourableenvironments followed by CH 309, CH 267 and CH 250.