Main Economic Traits Combining Ability and Heterosis of Edible Sunflower

doi:10.11924/j.issn.1000-6850.casb15090130

Abstract

Abstract: Six cytoplasmic male-sterile(CMS) lines improved from local varieties and four branched male restorer lines were hybridized with 6×4 incomplete diallel, 24F₁ hybrids were further used to estimate their general combining ability (GCA), specific combining ability(SCA) and heterosis effects on main economic traits of edible sunflower. Variance analysis showed that GCA of eight traits in sterile lines and seven traits in restorer lines had significant or highly significant variance, and SCA of four traits had significant or highly significant variance. The preponderance of additive gene action played the leading role in plant height, stem diameter, growth duration, head diameter, 100-grain weight, while total grain per head, effective grain per head, seed setting rate, and grain yield per plant were affected by additive gene action and non-addictive gene action variance. Based on the GCA effect analysis, among the CMS and the restorer lines, A6, A2 and C3 were found to be promising parents. Based on the SCA analysis, A2C1 was found to be a perfect cross. The result of heterosis analysis indicated that most economic traits had heterosis, some traits even showed super parent advantages which could be used. Most traits in F₁ inclined to parent of early maturity, strong and high stem, big disk and multi-grains.

CLC Number:

Yang Haifeng,Fan Yunqian,Duan Xueyan,Wei Ling and Liu Bo. Main Economic Traits Combining Ability and Heterosis of Edible Sunflower[J]. Chinese Agricultural Science Bulletin, 2016, 32(9): 106-111.

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