COMBINING ABILITY ANALYSIS FOR SEED PROTEINS, OIL CONTENT AND FATTY ACIDS COMPOSITION IN SUNFLOWER (HELIANTHUS ANNUUS L.)
Syeda Nasreen*, Mehwish Ishaque**, Muhammad Ayub Khan*, Saleem-ud-din* and Syeda Musarrat Gilani*
ABSTRACT
Genetically diverse sunflower (Helianthus annuus L.) inbred lines comprising six cytoplasmic male sterile (CMS) and six fertility restorer (R ) lines were crossed in a line x tester mating design to obtain 36 f F hybrids. Parental lines and F hybrids exhibited mean values for seed 1 1 total proteins, oil content and fatty acids composition. Among parental lines, CMS-64, CMS-53, CMS-H55-2-2-1 and CMS-53 were the best general combiners for seed total proteins, oil content, oleic and linoleic acid, respectively. Among males, C-206-R, SF-187R, RHA-295 and RHA-854 were the potential parents exhibiting desirable GCA for seed total proteins, oil content, oleic and linoleic acids, respectively. Among the F hybrids, 1 highest specific combining ability (SCA) estimates were exhibited by CMSNDMTC x RHA-295 (3.837) for seed total proteins whereas for oil content, the hybrid CMS-53 x SF-187R exhibited the highest SCA (11.317). F1 hybrid, CMS-NDMTC x RHA-295 (13.936) for oleic acid while CMS-53 x RHA-295 (17.986) hybrid for linoleic acid were the potential genotypes by exhibiting the maximum positive SCA values of 13.936 and 17.986, respectively. The variances due to SCA for all the quality characters were higher than GCA variances, showing non-additive type of gene action controlling the characters. Non-additive type of gene action can be utilized for varietal improvement through heterosis breeding. The lines x testers were the major contributors in inheritance of all characters studied.
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