Potential of tropical maize populations for improving an elite maize hybrid

	Potential of tropical maize populations for improving an elite maize hybrid
	Yong, Hongjun; Wang, Jianjun; Liu, Zhipeng; Li, Mingshun; Zhang, Degui; Li, Xinhai; Zhang, Shihuang
刊名	MAYDICA
	2011
卷号	56 期号:4 页码:359-366
关键词	Zea mays L maize germplasm favorable alleles elite hybrid
ISSN号	0025-6153
通讯作者	Yong, Hongjun
英文摘要	Identifying exotic maize (Zea mays L) populations possessing favorable new alleles lacking in local elite hybrids is an important strategy for improving maize hybrids. Selection of an appropriate breeding method will increase the chance of successfully transferring these favorable new alleles into elite inbred lines of local hybrids. The objectives of this study were to: (i) evaluate 14 maize populations from CIMMYT and identify those containing favorable alleles for grain yield, ear length, ear diameter, kernel length, plant height, and ear height that are lacking in a local super hybrid [Jidan261 (W9706 x Ji853)], and to (ii) determine which inbred parent should be improved. These results showed that the populations Pob43, Pob501, and La Posta had positive and significant numbers of favorable alleles not found in hybrid W9706 x Ji853 that could be used for simultaneous improvement of its grain yield, ear length, and kernel length, and that population QPM-Y was also a good donor for improvement of ear diameter and kernel length in the hybrid. Based on allele frequencies in the two inbred lines and the donor population, when the populations Pob43, La Posta, Pob501, and QPM-Y were used as donors, inbred line W9706 would be improved by selfing the F-1 of the cross W9706 x donor population. These results suggested that CIMMYT germplasm has potential to improve temperate elite hybrids. The relationship between GCA and SCA from a previous study and the parameters obtained from the Dudley method are discussed. The results showed that the values of Lpl mu' estimates obtained by applying the Dudley method had the same trend as GCA effects for grain yield but a less clear trend for ear length, while the trends in the relationship value were reversed for SCA between these populations and Lancaster-derived lines.
学科主题	Agronomy ; Plant Sciences ; AGRONOMY ; PLANT SCIENCES
语种	英语
出版者	MAYDICA-IST SPER CEREALICOLTUR
WOS记录号	WOS:000303962300007
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/5373]
专题	作物科学研究所_遗传育种系
作者单位	Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Yong, Hongjun,Wang, Jianjun,Liu, Zhipeng,et al. Potential of tropical maize populations for improving an elite maize hybrid[J]. MAYDICA,2011,56(4):359-366.
APA	Yong, Hongjun.,Wang, Jianjun.,Liu, Zhipeng.,Li, Mingshun.,Zhang, Degui.,...&Zhang, Shihuang.(2011).Potential of tropical maize populations for improving an elite maize hybrid.MAYDICA,56(4),359-366.
MLA	Yong, Hongjun,et al."Potential of tropical maize populations for improving an elite maize hybrid".MAYDICA 56.4(2011):359-366.