A line X tester mating set was obtained by crossing 20 diverse genotypes (female) with 3
well adapted genotypes (male) of Asiatic cotton. Sixty Fts alongwith 23 parents were
evaluated over three locations for 10 quantitative characters. The gca and sea variances
showed the predominant role of additive type of gene action in the inheritance of plant
height, bolls, seed-cotton yield, seed yield, lint yield and ginning (%), whereas both
additive and nonadditive components of genetic variance were important in the inheritance
of halo length. However, nonadditive genetic effects were predominant in the inheritance
of days to flower initiation, seed and lint indices. The best general combiners for most of
the characters were SD-5, RG-10, RG-8 and K7. No association between per se performance
and sea effect was observed. The parent and hybrids did not show consistent performance
over locations for plant height, bolls, seed-cotton yield, seed yield and lint yield.
Keywords: Line x tester, additive, nonadditive, specific combining ability, general combining ability.
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
S. K. TOMAR AND S. P. SINGH info_circle