Dissection of genetic overlap of salt tolerance QTLs at the seedling and tillering stages using backcross introgression lines in rice
Dissection of genetic overlap of salt tolerance QTLs at the seedling and tillering stages using backcross introgression lines in rice作者机构：Institute of Crop Sciences/National Key Facility for Crop Gene Resources & Genetic Improvement Chinese Academy of Agricultural Sciences Beijing China International Rice Research Institute Metro Manila Philippines
出 版 物：《Science China(Life Sciences)》 (中国科学（生命科学英文版）)
年 卷 期：2008年第51卷第7期
页 面：583-591页
核心收录：
学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 09[农学] 0901[农学-作物学]
基 金：State"973"Programs from the Ministry of Science and Technology of China(Grant No.2006CB100100) National High Technology Research and Devel-opment Program of China("863"Program)(Grant No.2007AA10Z191) Na-tional Natural Science Foundation of China(Grant No.30570996)
主 题：rice salt tolerance(ST) quantitative trait loci(QTL) genetic overlap
摘 要：QTLs for salt-tolerance(ST)related traits at the seedling and tillering stages were identified using 99 BC2F8 introgression lines(IL)derived from a cross between IR64(indica)as a recurrent parent and Binam(japonica)from Iran as the donor *** QTLs affecting survival days of seedlings(SDS), score of salt toxicity of leaves(SST),shoot K + concentration(SKC)and shoot Na + concentration(SNC) at the seedling stage and 22 QTLs underlying fresh weight of shoots(FW),tiller number per plant(TN) and plant height(PH)at the tillering stage were *** QTLs detected at the tillering stage showed obvious differential expression to salt stress and were classified into three types based on their differential *** I included 11 QTLs which were expressed only under the non-stress *** II included five QTLs expressed in the control and the salt stress conditions,and three of them(QPh5,QPh8 and QTn9)had similar quantity and the same direction of gene effect,suggesting their expression was less influenced by salt *** III included six QTLs which were detectable only under salt stress,suggesting that these QTLs were apparently induced by the *** QTLs affecting trait difference or trait stability of ILs between the stress and non-stress conditions were identified and the Binam alleles at all loci except QPh4,QTn2 and QFw2a decreased trait *** three QTLs less influenced by the stress and 13 QTLs affecting trait stability were considered as ST QTLs which contributed to *** the distribution of QTLs detected at the seedling and tillering stages,most(69%)of them were genetically *** four were the same or adjacent regions on chromosomes 1,2,8 and 11 harboring ST QTLs detected at the two stages,suggesting that partial genetic overlap of ST across the two stages *** is likely,therefore,to develop ST rice variety for both stages by pyramiding of ST QTLs of different stages or selection against the ove
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