Vol. 5 No. 2
Study of heterosis in brinjal (Solanum melongena L.) for yield attributing traits.
Abstract: Heterosis has been amply exploited in developing hybrids in brinjal. In India, only 17.8% area of brinjal cultivation is under hybrid seed due to lack of appropriate hybrids for specific area and purpose. In the present investigation, eight parents were selected on the basis of divergence and mated in line × tester design hybrids and parents were raised to measure heterosis for different yield attributes. Lines, testers and hybrids exhibited wide variation among them for different characters under study. Most of the hybrids exhibited positive relative heterosis and heterobeltiosis. In case of plant height, thirteen and ten number of hybrids exhibited positive relative heterosis and heterobeltiosis respectively. For primary branches per plant, all the hybrids registered significant positive relative heterosis and heterobeltiosis indicating increased vigor in the hybrids in lateral direction also. In case of days to 50% flowering, where negative heterosis is desirable, all the hybrids showed significant negative relative heterosis and ten hybrids showed negative heterobeltiosis. Six hybrids showed significant positive relative heterosis for fruit number per plant, whereas, four hybrids had negative values. In case of fruit length and fruit girth, both positive and negative heterosis was observed. For fruit weight, only six hybrids showed positive relative heterosis among which the hybrid BCB 38 × BCB 23 had the highest value (22.18%). Yield, the ultimate product of different yield components, exhibited up to 70.62% average heterosis and 37.9% heterobeltiosis in the hybrid BCB 75 × BCB 15. The mean performance also revealed the superiority of the hybrid BCB 75 × BCB 15.
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