J Integr Plant Biol. ›› 2011, Vol. 53 ›› Issue (9): 719-730.DOI: 10.1111/j.1744-7909.2011.01067.x

• Plant-environmental Interactions • Previous Articles     Next Articles

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

Xianshan Wu, Xiaoping Chang and Ruilian Jing*   

  1. National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Crop Germplasm and Biotechnology, Ministry of Agriculture, Institute of Crop Science, Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Haidian District, Beijing 100081, China
  • Received:2011-03-02 Accepted:2011-07-05 Published:2011-07-15
  • About author: *Corresponding author. Tel (Fax): +86 10 8210 5829; E-mail: jingrl@caas.net.cn


Carbon isotope discrimination (Δ13C) is considered a useful indicator for indirect selection of grain yield (GY) in cereals. Therefore, it is important to evaluate the genetic variation in Δ13C 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 Δ13C 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 Δ13C 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 Δ13C had an increased frequency of QTL for high Δ13C, GY and number of spikes per plant (NSP) when grown under rain-fed conditions and only for high Δ13C and NSP when grown under irrigated conditions, which was consistent with agronomic performance of the corresponding trait values in the high Δ13C progeny; that is, significantly greater than that in the low Δ13C. Therefore, selection for Δ13C was beneficial in increasing grain yield in rain-fed environments.

Wu X, Chang X, Jing R (2011) Genetic analysis of carbon isotope discrimination and its relation to yield in a wheat doubled haploid population. J. Integr. Plant Biol. 53(9), 719–730.

Key words: carbon isotope discrimination, drought stress, QTL, wheat, yield

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