作物学报2016，Vol.42Issue(8)：1103-1111,9.DOI:10.3724/SP.J.1006.2016.01103
甘蓝型油菜分枝角度主基因+多基因混合遗传模型及遗传效应
Genetic Effects of Branch Angle Using Mixture Model of Major Gene Plus Po-lygene inBrassica napus L.
摘要
Abstract
Branch angle is one of important plant architectural traits in rapeseed (Brassica napus), which is the basic requirement for high-density cultivation and mechanical harvesting. To reveal the genetic mechanism of branch angle in rapeseed, we pro-duced six generations (P1, P2, F1, F2, BCP1, and BCP2) from a cross between loose-type 6098B and compact-type Purler to analyze genetic effects of branch angle in rapeseed by the mixed major gene plus polygene inheritance model. The branch angle showed a continuous normal distribution, where both the basal branch angle and the top branch angle were dominated by a pair of major gene with additive-dominant effects plus polygenes with additive-dominance-epistasis effects (D-0 model). The additive effect and dominant effect of major gene of the top branch angle were 4.939 and –4.156, the heritability in BCP1, BCP2, and F2 was 34.08%, 1.40%, and 14.99%, respectively for the major gene, and 24.43%, 61.72%, and 63.98%, respectively for the polygenes. The additive effect and dominant effect of major gene of the basal branch angle were 2.217 and –1.941, the heritability in BCP1, BCP2, and F2 was 7.86%, 1.24%, and 4.84%, respectively for the major gene, and 66.46%, 58.49%, and 73.96%, respectively for the polygenes. Results of this study found that the branch angle traits of 6098B×Purler is controlled by polygenes, but there is a major gene among them. The research may be useful for further understanding and genetic improvement of plant architecture in rapeseed.关键词
油菜/分枝角度/理想株型/主基因+多基因/遗传效应Key words
Brassica napus L./Branch angle/Ideal plant architecture/Major gene plus polygene/Genetic effects引用本文复制引用
汪文祥,胡琼,梅德圣,李云昌,周日金,王会,成洪涛,付丽,刘佳..甘蓝型油菜分枝角度主基因+多基因混合遗传模型及遗传效应[J].作物学报,2016,42(8):1103-1111,9.基金项目
本研究由中国农业科学院科技创新工程项目(Group No.118),国家农业现代产业技术体系建设专项(CARS-13),国家自然科学基金项目(31471535),湖北省自然科学基金项目(2014CFB156)和湖北省科技创新工程项目资助。 This study was support by the Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences (Group No.118), the Earmarked Fund for China Agriculture Research System (CARS-13), the Natural Science Foundation of China (31471535), the Natural Sci-ence Foundation of Hubei Province (2014CFB156) and the Hubei Agricultural Science and Technology Innovation Center （Group No.118）
