Central Horticultural Experiment Station (IIHR), Namkum, Ranchi 834 010
Twenty-three genotypes of parwal were evaluated in 3 environments for plot yield, fruit number/plot, pulp weight, fruit volume, fruit length, fruit weight, node number and vine length. The stability analysis revealed the presence of genotype × environment interaction for all the charactes in all the environments. The joint regression analysis of variance showed high and significant differences among the genotypes tested for plot yield, pulp weight, fruit length, node number and vine length. No significant differences were observed in environmental means and environmental indices. The environment III was observed to be the most favourable environment for all the genotypes and attributes studied. Association between stability parameters and ecovalence revealed positive association between Xi and w: bi and w for vine length and negative association was found between Xi and w for pulp weight, bi and w for fruit length.
On the basis of individual parameters of adaptitbility (Xi, bi and s2 di), it is evident that Swarna Rekha and Swarna Alaukik found stable in yield and highly adaptable for commercial exploitation. Other 2 promising small-fruited parwal genotypes CHES 22 and CHES 23 recorded high mean yield, but their regression are more than unity and found suitable for favourable environments.
