Induced polygenic variation for economic traits in two restorer lines of sunflower (Helianthus annuus L.)
1997
Deshpande, S.K. | Giriraj, K. (University of Agricultural Sciences, Dharwad (India). Oilseeds Project)
Two restorer lines of sunflower IV83 (non-branching) and RLC-2 (branching) were irradiated with gamma rays at 10 kR, 15 kR and 20 kR to induce variability for flowering, test weight and oil content. In the M2 populations of both genotypes, the mean value for oil content was increased but the test weight increase was observed only in IV83 genotype. Shift in mean values was accompanied with increase in range, variance and coefficient of variation for all three traits in the M2 populations of both genotypes. Increased variation for flowering, test weight and oil content in irradiated population enabled effective selection for desirable genotypes. Early and late flowering lines identified in the present study could be utilized for developing single cross hybrids with different maturity groups (early and late)
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