GENETICS OF BRINJAL for ADAPTATION IN SUMMER SEASON

Abstract

newline The present investigation was carried out using twenty three genotypes of brinjal collected from Horticultural Research Station, Kahikuchi, Department of Horticulture, AAU, Jorhat, Tezpur and Mizoram. The experiment was conducted at Horticulture Research Farm, Assam Agricultural University, Jorhat. In the first growing season, the twenty three genotypes were assessed and based on the performance of genotypes and initial plant data, eight lines and three testers were selected and crossed in line x tester mating design to obtain twenty four cross combinations. The parental lines, their cross combinations and a check variety was sown in the second season.The analyses of variance revealed significant variation at genotypic level among the twenty three genotypes for all the sixteen characters except one i.e, fruit length. Between the replication, it was observed that there was significant variation in respect of leaf blade length. newlineThe characters, plant spread, fruit circumference, number of fruits per plant, fruit weight, fruit volume and fruit yield per plant had high estimates of both GCV and PCV. High heritability coupled with high genetic advance was observed for the traits, plant spread, fruit circumference, number of fruits per plant, fruit weight, fruit volume and fruit yield per plant. The fruit yield per plant had a significant positive genotypic and phenotypic correlation with plant height, plant spread, number of primary branches per plant, leaf blade length, fruit pedicel length, fruit circumference, number of fruits per plant and fruit weight. There were characters which manifested to be negatively correlated with yield indicating which were days to first flowering, days to 50% flowering, days to first fruiting and days to 50% fruiting. The highest positive direct effect was of days to first flowering (6.064). The genotypic residual effect was observed to be 0.122. newlineThe twenty three genotypes were grouped into 5 clusters with cluster I having the maximum number with twelve genotypes...