Combining ability assessment in Helianthus annuus L. through line tester analysis for quantitative traits and quality parameters

摘要

The cross combinations of different lines and testers (L×T) for high yielding sunflower (Helianthus annuus) hybrids were evaluated. Plant materials were utilized by L×T mating design of 7 lines and 3 testers and their 21 hybrids were sown in the field during 2015 autumn season in RCBD design with 3 replications. Genetic variability, general combing ability (GCA) and specific combining ability (SCA) among genotypes were assessed. Lines A-12, A-2.2 and tester G-53 were found to be good general combiners for days to flowering, plant height, number of leaves per plant, stem diameter, achene yield per head, 100-seed weight, oil content, and protein content. Among the crosses, A-12 × B-3.16 and B-12.10 × C-3.3 were reported as good specific combiners for yield-related traits. For protein content, the cross B-3.1 × B-3.16 showed the maximum SCA effects.