Genetic Contribution to Advanced Yield for Maize Hybrids Released from 1970 to 2000 in China

doi:10.2135/cropsci2010.04.0207

	Genetic Contribution to Advanced Yield for Maize Hybrids Released from 1970 to 2000 in China
	Ci, Xiaoke 1,3; Li, Mingshun 1; Liang, Xiaoling 2; Xie, Zhenjiang 1; Zhang, Degui 1; Li, Xinhai 1; Lu, Zhenyu 1; Ru, Gaolin 1; Bai, Li 1; Xie, Chuanxiao 1
刊名	CROP SCIENCE
	2011
卷号	51 期号:1 页码:13-20
ISSN号	0011-183X
DOI	10.2135/cropsci2010.04.0207
通讯作者	Ci, Xiaoke
英文摘要	Four to five cycles of maize (Zea mays L.) hybrid replacement have occurred in China since the 1970s. Retrospective analyses of genetic yield may provide an understanding of unexploited genetic potential and indicate pathways for future yield improvement. The objective of this study was to assess genetic gains in grain yield, especially those due to increased tolerance to stress in China from the 1970s through the 2000s. Trials were conducted at two locations per year and three densities per location during the 2005-2006 (Exp. 1) and 2007-2008 (Exp. 2) growing seasons. Over a 40-yr period, the genetic gain in yield averaged 94.7% kg ha(-1) per year and 53% of this was attributable to breeding undertaken in China. The newer hybrids showed increased tolerance to compound stress. We estimated that the contribution of stress tolerance to genetic yield gain was equal to 46 or 74% at 60,000 or 75,000 plants ha(-1), respectively. Yield improvement has occurred at a slow pace at densities of 60,000 and 75,000 plants ha(-1) in China. Further increasing maize grain yield in China will be achieved through higher plant populations, and this will require breeding for greater stress tolerance.
学科主题	Agronomy ; AGRONOMY
语种	英语
出版者	CROP SCIENCE SOC AMER
WOS记录号	WOS:000285411100003
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/5356]
专题	作物科学研究所_遗传育种系
作者单位	1.Chinese Acad Agr Sci, Inst Crop Sci, Dep Crop Genet & Breeding, Maize Ctr, Beijing 100081, Peoples R China 2.Xinjiang Acad Agr Sci, Urumchi City 830091, Xinjiang Prov, Peoples R China 3.Shandong Agr Univ, State Key Lab Crop Biol, Tai An, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Ci, Xiaoke,Li, Mingshun,Liang, Xiaoling,et al. Genetic Contribution to Advanced Yield for Maize Hybrids Released from 1970 to 2000 in China[J]. CROP SCIENCE,2011,51(1):13-20.
APA	Ci, Xiaoke.,Li, Mingshun.,Liang, Xiaoling.,Xie, Zhenjiang.,Zhang, Degui.,...&Zhang, Shihuang.(2011).Genetic Contribution to Advanced Yield for Maize Hybrids Released from 1970 to 2000 in China.CROP SCIENCE,51(1),13-20.
MLA	Ci, Xiaoke,et al."Genetic Contribution to Advanced Yield for Maize Hybrids Released from 1970 to 2000 in China".CROP SCIENCE 51.1(2011):13-20.