Author/Authors :
Husna، A نويسنده Department of Biotechnology, Patuakhali Science and Technology University, Patuakhali, Bangladesh , , Maih، M. A نويسنده Department of Entomology, Patuakhali Science and Technology University, Patuakhali, Bangladesh , , Begum، S نويسنده Plant Breeding Division, Bangladesh Agricultural Research Institution, Gazipur, Bangladesh , , Shilpi، S. Z نويسنده Department of Soil Science, Sher-e-Bangla Agriculture University, Dhaka, Bangladesh , , Islam، M. R نويسنده Department of Biotechnology, Patuakhali Science and Technology University, Patuakhali, Bangladesh ,
Abstract :
Variability, correlation and path analysis among different characters of thirty one bottle gourd genotypes were studied. There was a great deal of significant variation for all the characters among the genotypes. High genotypic co-efficient of variation (GCV) was observed for days to first male flowering and female flower pedicel length whereas low genotypic co-efficient of variation was observed for leaf petiole length and male flower pedicel length. In all cases, phenotypic variances were higher than the genotypic variance. Differences between genotypic and phenotypic coefficients revealed that the major portion of the phenotypic variance was genetic in nature. High heritability with low genetic advance in percent of mean was observed in leaf petiole length which indicated that non-additive gene effects were involved for the expression of this character and selection for such trait might not be rewarding. High heritability with high genetic advance in percent of mean was observed for days of first male flowering and female flower pedicel length indicated that this trait was under additive gene control and selection for genetic improvement for this trait would be effective. Correlation studies revealed that highest significant association of yield per plant with vegetative characters no. of branches per vine followed by leaf breadth at genotypic and phenotypic level. Path co-efficient analysis revealed maximum direct contribution towards yield per plant with vegetative traits of no. of branches per vine followed by leaf breadth. Considering all the characters the G4 (BD-4580), G31 (BD-8948), G26 (BD-4560) and G28 (BD-4569) were selected for future breeding programme.
