THE COMBINING ABILITY EFFECTS BY LINE X TESTER ANALYSIS METHOD IN SUNFLOWER (Helianthus annuus L.)


Dağüstü N.

V. BALKAN AGRICULTURE CONGRESS, 20-23 SEPTEMBER, EDİRNE, TÜRKİYE, Edirne, Turkey, 20 - 23 September 2023, pp.16-19

  • Publication Type: Conference Paper / Summary Text
  • City: Edirne
  • Country: Turkey
  • Page Numbers: pp.16-19
  • Bursa Uludag University Affiliated: Yes

Abstract

In order to analyze general and specific combining abilities and the genetic implications regarding yield and yield related components (plant height, head diameter, number of leaf, number of branching, stem thickness, 1000-seed weight and seed yield/plant) in oil seed sunflower (Helianthus annuus L.), 4 CMS lines and 5 restorer lines (tester) were crossed in a line × tester programme. The field experiments were conducted in a randomized complete block design with three replications in the Agricultural Research Station, Bursa Uludağ University located southern Marmara region of Turkey in 2019 and 2020 growing seasons. General and specific combining ability, broad and narrow sense of heritability of parents and crosses were calculated with line X tester method.

The significant differences among the parents, crosses and parents versus crosses mainly observed within examined characters. Combining abilities of the parents gave positive and/or significant results for all characters examined. Two-year results revealed that the male parent RHA-7 and the female parent CMS-3 considered as good general combiners for seed yield per head and 1000 seed weight. Specific combining abilities of hybrids changed differently within two years. Hybrid combinations, 4x9 (head diameter), 2X7 (number of leaf), 1X5 and 4X9 (1000 seed weight), 2X9 (stem thickness), 2x5 and 3X7 (seed yield/head) released positive and/or significant specific combining ability values, were promising hybrids.

The fact that the heritability in the broad sense is higher than the degree of heritability in the narrow sense in both years shows that the genetic factors as well as the environment have a great effect on the all of the examined characters. Therefore, it is appropriate to start the selection in the F3 generation. Additive gene effects for plant height and seed yield per plant and non-additive gene effects for head diameter, number of leaf, number of branching and 1000 seed weight were obtained for the genetic materials studied.