Genetic Analysis of Carbon Isotope Discrimination and its Relation to Yield in a Wheat Doubled Haploid Population

文献类型: 外文期刊

第一作者: Wu, Xianshan

作者: Wu, Xianshan;Chang, Xiaoping;Jing, Ruilian

作者机构:

关键词: carbon isotope discrimination;drought stress;QTL;wheat;yield

期刊名称:JOURNAL OF INTEGRATIVE PLANT BIOLOGY ( 影响因子:7.061; 五年影响因子:6.002 )

ISSN: 1672-9072

年卷期: 2011 年 53 卷 9 期

页码:

收录情况: SCI

摘要: Carbon isotope discrimination (Delta(13)C) is considered a useful indicator for indirect selection of grain yield (GY) in cereals. Therefore, it is important to evaluate the genetic variation in Delta(13)C and its relationship with GY. A doubled haploid (DH) population derived from a cross of two common wheat varieties, Hanxuan 10 (H10) and Lumai 14 (L14), was phenotyped for Delta(13)C in the flag leaf, GY and yield associated traits in two trials contrasted by water availability, specifically, rain-fed and irrigated. Quantitative trait loci (QTLs) were identified by single locus and two locus QTL analyses. QTLs for Delta(13)C were located on chromosomes 1A, 2B, 3B, 5A, 7A and 7B, and QTLs for other traits on all chromosomes except 1A, 4D, 5A, 5B and 6D. The population selected for high Delta(13)C had an increased frequency of QTL for high Delta(13)C, GY and number of spikes per plant (NSP) when grown under rain-fed conditions and only for high Delta(13)C and NSP when grown under irrigated conditions, which was consistent with agronomic performance of the corresponding trait values in the high Delta(13)C progeny; that is, significantly greater than that in the low Delta(13)C. Therefore, selection for Delta(13)C was beneficial in increasing grain yield in rain-fed environments.

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