Chinese Journal OF Rice Science

Chinese Journal OF Rice Science >

2011 , Vol. 25 >Issue 1: 99 - 102

DOI: https://doi.org/10.3969/j.issn.1001-7216.2011.01.01

研究简报

Quantitative Trait Loci Associated with Pollen Fertility Under High Temperature Stress at Flowering Stage in Rice

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  • Rice Research Institute, Hunan Agricultural University, Changsha 410128, China; *Corresponding author, E-mail: xiao_yh@yahoo.com.cn

Received date: 1900-01-01

  Revised date: 1900-01-01

  Online published: 2011-01-10

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Abstract

The quantitative trait loci (QTLs) underlying tolerance to high temperature stress(HTS) were identified using the recombinant inbred lines (RILs) derived from a cross between the heat tolerant rice line 996 and the sensitive line 4628. Pollen fertility was used as the heattolerance indicator for the lines, which was determined when the lines was subjected to HTS at the flowering stage in field experiments. Two QTLs that affected pollen fertility were detected in the interval between RM5687 and RM471 on chromosome 4, and between RM190 and RM225 on chromosome 6 by using composite interval mapping (CIM) analysis. The QTL qPF4 on chromosome 4 explained 15.1% of the total variation in pollen fertility, and increased the pollen fertility of HTSsubjected plants by 7.15%. The second QTL qPF6 on chromosome 6 explained 9.31% of the total variation in pollen fertility, and increased the pollen fertility of plants subjected to HTS by 5.25%. The positive additive effects of the two QTLs were derived from the line 996 alleles. The two major QTLs identified should be useful for further fine mapping and cloning of these genes and for molecular markerassisted selection of heattolerant rice cultivars.

Key words： rice; quantitative trait locus; pollen fertility; high temperature stress

Cite this article

PAN Yi,LUO Li-hua,DENG Hua-bing,ZHANG Gui-lian,TANG Wen-bang,CHEN Li-yun,XIAO Ying-hui* . Quantitative Trait Loci Associated with Pollen Fertility Under High Temperature Stress at Flowering Stage in Rice
[J]. Chinese Journal OF Rice Science, 2011 , 25(1) : 99 -102 . DOI: 10.3969/j.issn.1001-7216.2011.01.01

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