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Ten crosses involving seven parents crossed in line ×tester design were studied for main stem height.plant-1,main stem leaves.plant-1,stems.plant-1,plant weight.plant-1,average tuber weight.plant-1 and tuber dry matter %in F1 generation.The additive gene action was found to be more important for the characters,main stem height.plant-1,main stem leaves.plant-1,stems.plant-1,plant weight.plant-1,and average tuber weight.plant-1.Among seven parents,Lal-silbilati,Lalpakri and Ausha were good combiners for the characters,main stem height.plant-1,main stem leaves.plant-1andaverage tuber weight.plant-1,respectively.For average tuber weight.plant-1,the crosses Patnae/TPS-67 and Lalpakri/TPS-13 showed significant positive specific combining ability effects.Ausha/TPS-67 showed significant positive specific com-bining ability effects for main stem leaves.plant-1.
Ten crosses involving seven parents crossed in line × tester design were studied for main stem height .plant-1, main stem leaves.plant-1, stems.plant-1, plant weight.plant-1, average tuber weight.plant-1 and tuber dry matter% in F1 generation. The additive gene action was found to be more important for the characters, main stem height .plant-1, main stem leaves .plant- 1, stems.plant- 1, plant weight. 1, and average tuber weight. Plant-1.Among seven parents, Lal-silbilati, Lalpakri and Ausha were good combiners for the characters, main stem height .plant-1, main stem leaves.plant- 1 andaverage tuber weight.plant- 1 , respectively.For average tuber weight .plant-1, the crosses Patnae / TPS-67 and Lalpakri / TPS-13 showed significant positive specific combining ability effects. Ausha / TPS-67 showed significant positive specific com- bining ability effects for main stem leaves.plant-1.