Abstract
The experiment was conducted at the experimental field of Olericulture Division, Horticulture Research Centre (HRC), Bangladesh Agricultural Research Institute (BARI), Gazipur, Bangladesh during the winter season of 2018-2019 to study the genetic architecture of yield in a seven parent half diallel cross of bottle gourd. The values of mean square for GCA (general combining ability) and SCA (specific combining ability) were highly significant which suggested the presence of both additive and non-additive genetic variance in the population. But the higher magnitude of GCA compared to SCA indicated predominance of additive genetic variance. In most of the cases, the cross between poor and poor parents showed positive SCA effect for fruit yield, which indicated the higher yield. The estimates of significant positive better parent heterosis ranged from 6.27 to 49.72 percent. Analysis of genetic components of variation suggested that additive components were more important in the inheritance of fruit yield. This character was observed being controlled by two to three pairs of genes or groups of genes. Narrow sense heritability was 23 percent indicating probability of selection in generations. The graphical analysis also indicated wide genetic diversity among the parents.
Highlights
Bottle gourd [Lagenaria siceraria (Mol.) Stand.] originated in Africa and from there, it spread over the world [1]
The higher magnitude of GCA compared to SCA indicated predominance of additive genetic variance
P6 and P2 × P7 were found promising for high yielding
Summary
Bottle gourd [Lagenaria siceraria (Mol.) Stand.] originated in Africa and from there, it spread over the world [1]. Bottle gourd fruits are used as cooked vegetables. Its leaves and tender stems are used as delicious and nutritious vegetables. It is reported as an digestible vegetable which keeps the body cool and prevents constipation [3]. Each 100 g bottle gourd contains protein 1.1 g, carbohydrate 15.1 g, fat 0.1 g, minerals 0.6 g, and several vitamins [4]
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