QTLs for drought escape and tolerance identified in a set of random introgression lines of rice

doi:10.1007/s00122-005-0099-8

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	QTLs for drought escape and tolerance identified in a set of random introgression lines of rice
	Xu, JL; Lafitte, HR; Gao, YM; Fu, BY; Torres, R; Li, ZK
刊名	THEORETICAL AND APPLIED GENETICS
	2005
卷号	111 期号:8 页码:1642-1650
ISSN号	0040-5752
DOI	10.1007/s00122-005-0099-8
通讯作者	Xu, JL
英文摘要	A large set of 254 introgression lines in an elite indica genetic background were evaluated for grain yield (GY) and related traits under the irrigated (control) and drought (stress) conditions in two consecutive years for genetic dissection of adaptive strategies of rice to water stress. A total of 36 quantitative trait loci (QTLs) affecting heading date (HD), plant height (PH), GY and yield components were identified and most QTLs showed pronounced differential expression either qualitatively or quantitatively in response to drought. These QTLs could be grouped into three major types based on their behaviors under control and stress conditions. Type I included 12 QTLs that expressed under both the stress and non-stress conditions. Type II comprised 17 QTLs that expressed under irrigation but not under stress. Type III included seven QTLs that were apparently induced by stress. The observation that the Lemont (japonica) alleles at all HD QTLs except QHd5 resulted in early heading under stress appeared to be responsible for the putative adaptation of Lemont to drought by escaping, whereas the Teqing (indica) alleles at most PH/GY QTLs were consistently associated with increased yield potential and trait stability and thus contributed to DT. Our result that most DT QTLs were non-allelic with QTLs for drought escaping suggests that the two adaptive strategies in the parental lines are under possible negative regulation of two largely non-overlapping genetic systems.
学科主题	Agronomy ; Plant Sciences ; Genetics & Heredity ; Horticulture ; AGRONOMY ; GENETICS & HEREDITY ; HORTICULTURE ; PLANT SCIENCES
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000233246200020
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/5761]
专题	作物科学研究所
作者单位	(1)Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China;(2)Int Rice Res Inst, Manila, Philippines
推荐引用方式 GB/T 7714	Xu, JL,Lafitte, HR,Gao, YM,et al. QTLs for drought escape and tolerance identified in a set of random introgression lines of rice[J]. THEORETICAL AND APPLIED GENETICS,2005,111(8):1642-1650.
APA	Xu, JL,Lafitte, HR,Gao, YM,Fu, BY,Torres, R,&Li, ZK.(2005).QTLs for drought escape and tolerance identified in a set of random introgression lines of rice.THEORETICAL AND APPLIED GENETICS,111(8),1642-1650.
MLA	Xu, JL,et al."QTLs for drought escape and tolerance identified in a set of random introgression lines of rice".THEORETICAL AND APPLIED GENETICS 111.8(2005):1642-1650.