中国水稻科学

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粳稻发芽期耐碱性的QTL检测

祁栋灵1,2,李丁鲁3,杨春刚4,李明哲3,曹桂兰1,张俊国4,周庆阳5,徐锡哲3,张三元4,*.韩龙植1,*   

  1. 1中国农业科学院 作物科学研究所/国家农作物基因资源与基因改良重大科学工程/农业部作物种质资源与生物技术重点开放实验室, 北京 100081; 2中国热带农业科学院 橡胶研究所/国家重要热带作物工程技术研究中心/省部共建国家重点实验室培育基地海南省热带作物栽培生理学重点实验室, 海南 儋州571737; 3韩国农村振兴厅 国立农业科学院, 韩国 水原 441-707; 4吉林省农业科学院 水稻研究所, 吉林 公主岭 136100; 5四川农业大学 园艺系, 四川 雅安625014; *通讯联系人, E-mail: lzhan58@yahoo.com.cn; jlgzszsy12@126.com
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-11-10 发布日期:2009-11-10

Detection of QTL for Alkali Tolerance at the Germination Stage in japonica Rice

QI Dong-ling1, 2, LEE Jung-ro3, YANG Chun-gang4, LEE Myung-chul3, CAO Gui-lan1, ZHANG Jun-guo4, ZHOU Qing-yang5, SUH Seok-cheol3, ZHANG San-yuan4,*, HAN Long-zhi1,*   

  1. 1Institute of Crop Science, Chinese Academy of Agricultural Sciences/The National Key Facility for Crop Gene Resources and Genetic Improvement, NFCRI/Key Laboratory of Crop Germplasm Resources and Biotechnology, Ministry of Agriculture, Beijing 100081, China; 2Institute of Rubber Research, Chinese Academy of Tropical Agricultural Sciences/State Engineering and Technology Research Center for Key Tropical Crops/State Key Laboratory Breeding Base of Cultivation & Physiology for Tropical Crops,Hainan Provincial Key Laboratory for Tropical Crops Physiology, Danzhou 571737, China; 3National Academy of Agricultural Sciences, RDA, Suwon 441707, Korea; 4Institute of Rice Research, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, China; 5Horticultural Department, Sichuan Agricultural University, Ya′an 625014, China; *Corresponding authors, E-mail: lzhan58@yahoo.com.cn, jlgzszsy12@126.com
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-11-10 Published:2009-11-10

摘要: 以粳粳交高产106/长白9号的200个F2:3株系为作图群体,在0.15% Na2CO3溶液碱胁迫下,进行了水稻发芽率及其相对碱害率的鉴定评价,并以SSR标记构建的分子连锁图谱为基础,对水稻发芽率及其相对碱害率进行了数量性状基因座(QTL)检测。结果表明,在F3株系群中水稻发芽率及其相对碱害率均呈单峰接近正态的连续分布。共检测到碱胁迫下与水稻发芽率相关的QTL 7个,对表型变异的贡献率范围为4.05%~12.61%,其中位于第6染色体RM225-RM204区间的qGC6和位于第9染色体RM219-RM3700区间的qGC9对表型变异的贡献率分别为12.61%和10.85%。共检测到与水稻发芽率相对碱害率相关的QTL 6个,对表型变异的贡献率为4.82%~28.07%,其中位于第2染色体RM29-RM221区间的qRGC2、位于第6染色体RM225-RM204区间的qRGC61、位于第9染色体RM219-RM3700区间的qRGC9和位于第12染色体RM260-RM3226区间的qRGC12对表型变异的贡献率较大,分别为28.07%、15.35%、15.61%和18.91%,为主效QTL,但其相应的区间距离均较远,需要进一步深入研究。所检测的QTL增效等位基因主要表现为部分显性和超显性。

关键词: 水稻, 耐碱性, 发芽率, 相对碱害率, 微卫星标记, 数量性状基因座

Abstract: The quantitative trait loci (QTLs) for germination capacity and relative alkali damage rate for germination capacity in rice under alkali stress (0.15% Na2CO3 solution) were identified by using an F2:3 population, which included 200 individuals and lines derived from a cross between two japonica cultivars Gaochan 106 and Changbai 9 with microsatellite markers. The germination capacity and its relative alkali damage rate showed a continuous and near normal distribution in F3 lines. Seven QTLs associated with the germination capacity under alkali stress were detected, which explained 4.05% to 12.61% of the observed phenotypic variances. qGC6 and qGC9 were located in RM225-RM204 and RM219-RM3700, respectively, which accounted for 12.61% and 10.85% of the observed phenotypic variation, respectively. Six QTLs correlated with relative alkali damage rate for germination capacity under alkali stress were detected. qRGC2, qRGC61, qRGC9, and qRGC12 were major QTLs located in RM29-RM221, RM225-RM204, RM219-RM3700, and RM260-RM3226, respectively, which explained 28.07%, 15.35%, 15.61% and 18.91% of the observed phenotypic variation, respectively. Given the long distances between the markers further research should be conducted. Most of the alleles were partially dominant or overdominant.

Key words: rice, alkali tolerance, germination capacity, relative alkali damage rate, microsatellite marker, quantitative trait locus