HETEROSIS AND COMBINING ABILITY FOR YIELD AND YIELD CONTRIBUTING CHARACTERS IN BOTTLE GOURD .....

It is critical to understand heterosis and combining ability while selecting parental materials for a breeding effort. To determine heterosis and combining ability in bottle gourd, a field experiment was conducted at the central farm of the Olericulture Division, Horticulture Research Center (HRC), Bangladesh Agricultural Research Institute (BARI), Gazipur-1701. In this experiment, twenty-one cross combinations were employed in a Randomized Completely Block Design that was duplicated three times. All of the investigated characters showed both positive and negative substantial heterosis. 59-1-1-1-1-8 x BG0048 and 59-1-1-1-1-8 x BARI Lau-1 were the best cross combinations for economically exploiting heterosis for fruit number and yield. The cross 59-1-1-1(A)-7x BARI Lau-1 has the potential to increase fruit production and yield per plant. Short-duration hybrids could be developed using the cross 59-1-1-1(A)-7 x BG0048, followed by 62-12-1-2-2-2 x BG0048, and 8-3-1-1-1-1-1 x BG0059. The parent 62-12-1-2-2-2 was discovered to be a good general combiner for yield, fruits per plant, and earliness, whereas BG59-1-1-1(A)-17 was discovered to be a good general combiner for fruits and yield per plant. The male parent can be the tester BG0059, which exhibited a significant and higher positive GCA effect for fruits and yield per plant, as well as a significant negative GCA effect for days to first male and female flowering. The cross combinations 59-1-1-1-1-8 x BG0059, 59-1-1-1-1-8 x BARI lau-1, and 72-1-1-1-4 x BG0059 all demonstrated a substantial and increased positive SCA effect for fruits and yield per plant, indicating the possibility of developing a commercial hybrid.

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