In a line x tester study of cotton (Gossypium hirsutum L.) involving 11 lines and 3 testers. (33 hybrids), it was found that all the characters studied (i.e., plant height, humber of monopodia. days to 50% flowering, days to 50% boll bursting, boll weight and yield of seed cotton) are controlled by additive but predominantly non-additive gene action. The best general combiners in the parents were 138 F, 83 and MCU6 for carliness and for 50 per cent boll bursting and 133 F for higher boll weight. The hybrid 108F x-MCU 6 was considered as the best cross, because it recorded significant positive sca effect for both yield of seed cotton and boll weight.
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