J Integr Plant Biol. ›› 2009, Vol. 51 ›› Issue (9): 879-888.DOI: 10.1111/j.1744-7909.2009.00846.x

Special Issue: Rice Genomics and Agriculture

• Molecular Physiology • Previous Articles     Next Articles

Correlation and Quantitative Trait Loci Analyses of Total Chlorophyll Content and Photosynthetic Rate of Rice (Oryza sativa) under Water Stress and Well-watered Conditions

Song-Ping Hu1,2†,Ying Zhou1†, Lin Zhang1 , Xiu-Dong Zhu3 , Lin Li3 , Li-Jun Luo2 , Guo-Lan Liu2 and Qing-Ming Zhou3*   

  1. 1 College of Resource and Environmental Science, Jishou University, Hunan 416000, China
    2 Shanghai Agrobiological Gene Center, Shanghai 201106, China
    3 College of Agriculture, Agricultural University of Hunan, Changsha 410128, China
  • Received:2008-12-18 Accepted:2009-05-05 Published:2009-07-03
  • About author:
    * Author for correspondence Tel: +86 731 4617 388; Fax: +86 731 4629 620; E-mail: sp6974@163.com
    Songping Hu and Ying Zhou contributed equally to this work.

Abstract:

In order to explore the relevant molecular genetic mechanisms of photosynthetic rate (PR) and chlorophyll content (CC) in rice (Oryza sativa L.), we conducted a series of related experiments using a population of recombinant inbred lines (Zhenshan97B × IRAT109). We found a significant correlation between CC and PR (R = 0.19**) in well-watered conditions, but no significant correlation during water stress (r = 0.08). We detected 13 main quantitative trait loci (QTLs) located on chromosomes 1, 2, 3, 4, 5, 6, and 10, which were associated with CC, including six QTLs located on chromosomes 1, 2, 3, 4, and 5 during water stress, and seven QTLs located on chromosomes 2, 3, 4, 6, and 10 in well-watered conditions. These QTLs explained 47.39% of phenotypic variation during water stress and 56.19% in well-watered conditions. We detected four main QTLs associated with PR; three of them (qPR2, qPR10, qPR11) were located on chromosomes 2, 10, and 11 during water stress, and one (qPR10) was located on chromosome 10 in well-watered conditions. These QTLs explained 34.37% and 18.41% of the phenotypic variation in water stress and well-watered conditions, respectively. In total, CC was largely controlled by main QTLs, and PR was mainly controlled by epistatic QTL pairs.
 

Hu SP, Zhou Y, Zhang L, Zhu XD, Li L, Luo LJ, Liu GL, ZhouQM (2009). Correlation and quantitative trait loci analyses of total chlorophyll content and photosynthetic rate of rice (Oryza sativa) under water stress and well-watered conditions. J. Integr. Plant Biol. doi: 10.1111/j.1744 7909.2009.00846.x
 

Key words: chlorophyll content, photosynthetic rate, quantitative trait loci, rice, water stress.

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