Genetic basis of grain yield heterosis in an "immortalized F-2" maize population

doi:10.1007/s00122-014-2368-x

	Genetic basis of grain yield heterosis in an "immortalized F-2" maize population
	Guo, Tingting 1,2,3; Yang, Ning 4; Tong, Hao 4; Pan, Qingchun 4; Yang, Xiaohong 1; Tang, Jihua 5; Wang, Jiankang 2,3; Li, Jiansheng 1; Yan, Jianbing 4
刊名	THEORETICAL AND APPLIED GENETICS
	2014
卷号	127 期号:10 页码:2149-2158
ISSN号	0040-5752
DOI	10.1007/s00122-014-2368-x
通讯作者	Guo, Tingting
英文摘要	Genetic basis of grain yield heterosis relies on the cumulative effects of dominance, overdominance, and epistasis in maize hybrid Yuyu22.Heterosis, i.e., when F-1 hybrid phenotypes are superior to those of the parents, continues to play a critical role in boosting global grain yield. Notwithstanding our limited insight into the genetic and molecular basis of heterosis, it has been exploited extensively using different breeding approaches. In this study, we investigated the genetic underpinnings of grain yield and its components using "immortalized F-2" and recombinant inbred line populations derived from the elite hybrid Yuyu22. A high-density linkage map consisting of 3,184 bins was used to assess (1) the additive and additive-by-additive effects determined using recombinant inbred lines; (2) the dominance and dominance-by-dominance effects from a mid-parent heterosis dataset; and (3) the various genetic effects in the "immortalized F-2" population. Compared with a low-density simple sequence repeat map, the bin map identified more quantitative trait loci, with higher LOD scores and better accuracy of detecting quantitative trait loci. The bin map showed that, among all traits, dominance was more important to heterosis than other genetic effects. The importance of overdominance/pseudo-overdominance was proportional to the amount of heterosis. In addition, epistasis contributed to heterosis as well. Phenotypic variances explained by the QTLs detected were close to the broad-sense heritabilities of the observed traits. Comparison of the analyzed results obtained for the "immortalized F-2" population with those for the mid-parent heterosis dataset indicated identical genetic modes of action for mid-parent heterosis and grain yield performance of the hybrid.
学科主题	Agronomy ; Plant Sciences ; Genetics & Heredity ; Horticulture
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000342494500008
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/4828]
专题	作物科学研究所_分子生物学系
作者单位	1.China Agr Univ, Natl Maize Improvement Ctr, Beijing 100193, Peoples R China 2.Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China 3.Chinese Acad Agr Sci, CIMMYT China, Beijing 100081, Peoples R China 4.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China 5.Henan Agr Univ, Coll Agron, Zhengzhou 450002, Peoples R China
推荐引用方式 GB/T 7714	Guo, Tingting,Yang, Ning,Tong, Hao,et al. Genetic basis of grain yield heterosis in an "immortalized F-2" maize population[J]. THEORETICAL AND APPLIED GENETICS,2014,127(10):2149-2158.
APA	Guo, Tingting.,Yang, Ning.,Tong, Hao.,Pan, Qingchun.,Yang, Xiaohong.,...&Yan, Jianbing.(2014).Genetic basis of grain yield heterosis in an "immortalized F-2" maize population.THEORETICAL AND APPLIED GENETICS,127(10),2149-2158.
MLA	Guo, Tingting,et al."Genetic basis of grain yield heterosis in an "immortalized F-2" maize population".THEORETICAL AND APPLIED GENETICS 127.10(2014):2149-2158.