摘要
In this study, a population of chromosome segment substitution lines （CSSLs） derived from the cross between 9311 （indica） and Nipponbare （japonica） was employed to map the quantitative trait loci （QTLs） for salt tolerance under the salt stress simulated with 0.5% NaCI, using survival rate as the index. The data were analyzed by QTL IciMapping v3.1, and the results showed that one QTL （QSsr3） related to salt tolerance was located in the vicinity of the marker RM1350 on chromosome 3, into a genetic interval of 113.2-132.8 cM, with a contribution rate of 17.75%. The additive effect was 10.9, indicating that the QTL derived from the parent Nipponbare improved the salt tolerance of rice at seedling stage. This study will provide a theoretical basis for the selection of salt tolerant rice germplasm.
[目的]解决盐碱化土地水稻生产,缓解粮食供求矛盾。[方法]以籼稻品种9311和粳稻品种日本晴为亲本培育的高代回交置换系为材料,在0.5%NaCl盐胁迫条件下,以存活率为耐盐指标,进行水稻苗期耐盐性QTL定位。[结果]采用QTL IciMapping v3.1软件对存活率进行QTL分析,在第3染色体相邻标记RM1350附近检测到1个苗期耐盐相关QTL(QSst3),所在遗传区间为113.2 cM^132.8 cM,贡献率17.75%,加性效应10.9,说明来自供体亲本日本晴相应QTL使苗期耐盐性变强。[结论]该研究有利于水稻耐盐性种质资源的筛选。
基金
国家科技支撑计划(2015BAD01B01-3)~~
