J Integr Plant Biol ›› 2012, Vol. 54 ›› Issue (1): 33-44.DOI: 10.1111/j.1744-7909.2011.01088.x

• Molecular Physiology • Previous Articles     Next Articles

Quantitative Trait Loci Mapping of Dark-Induced Senescence in Winter Wheat (Triticum aestivum)

Hongwei Li1, Fanyun Lin1, Gui Wang1, Ruilian Jing2, Qi Zheng1, Bin Li1 and Zhensheng Li1*   

  1. 1State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, the Chinese Academy of Sciences, Beijing 100101, China.
    2Institute of Crop Sciences, the Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2011-08-16 Accepted:2011-11-07 Published:2011-11-16
  • About author:*Corresponding author. Tel: 86 10 6488 9381; Fax: 86 10 6487 0483; E-mail: zsli@genetics.ac.cn

Abstract:

In order to explore the genetics of dark-induced senescence in winter wheat (Triticum aestivum L.), a quantitative trait loci (QTL) analysis was carried out in a doubled haploid population developed from a cross between the varieties Hanxuan 10 (HX) and Lumai 14 (LM). The senescence parameters chlorophyll content (Chl a+b, Chl a, and Chl b), original fluorescence (Fo), maximum fluorescence level (Fm), maximum photochemical efficiency (Fv/Fm), and ratio of variable fluorescence to original fluorescence (Fv/Fo) were evaluated in the second leaf of whole three-leaf seedlings subjected to 7 d of darkness. A total of 43 QTLs were identified that were associated with dark-induced senescence using composite interval mapping. These QTLs were mapped to 20 loci distributed on 11 chromosomes: 1B, 1D, 2A, 2B, 3B, 3D, 5D, 6A, 6B, 7A, and 7B. The phenotypic variation explained by each QTL ranged from 7.5% to 19.4%. Eleven loci coincided with two or more of the analyzed parameters. In addition, 14 loci co-located or were linked with previously reported QTLs regulating flag leaf senescence, tolerance to high light stress, and grain protein content (Gpc), separately.

Li H, Lin F, Wang G, Jing R, Zheng Q, Li B, Li Z (2012) Quantitative trait loci mapping of dark-induced senescence in winter wheat (Triticum aestivum). J. Integr. Plant Biol. 54(1), 33–44.

Key words: Chlorophyll content, photosynthetic efficiency, senescence, Triticum aestivum

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