Abstract

The combining ability for seed characters in cotton was estimated in a 'line' X tester TJU analysis, involving seven lines of G.hirsutum (differing in grades of fuzz) and four varieties as testers. Both additive and non-additive gene action was observed for fuzz grade, single seed weight. single seed coat weight and single seed kernel weight. Crosses recording high sca effects (in the desired direction) involved parents with high x high or low x low gca effects. The parents (lines) TCH 89/7 (naked seed) is a good combiner for fuzz grade, single seed coat weight and single seed kernel weight; TCH 65/8 (sparsely fuzzed) for fuzz grade, single seed weight and single seed kernel weight, and TCH 96/6 for single seed coat weight. And among testers MCU 5 is a good combiner for single seed weight and single seed kernel weight; MCU 7 for single seed coat weight and LRA 5166 for fuzz grade.

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