水稻地方品种苗期耐盐QTL的定位

doi:10.7668/hbnxb.201751449

摘要/Abstract

摘要： 水稻耐盐遗传位点的发掘可为耐盐遗传机制的研究提供理论基础，为耐盐品种培育提供基因资源。以云南地方籼稻品种扎西玛与江苏著名优质粳稻品种南粳46为亲本构建的水稻重组自交系群体为研究对象，鉴定了各株系的苗期耐盐性，结合该群体的分子连锁图谱对控制水稻苗期耐盐性QTL进行分析，共检测到4个QTLs：qSST-1、qSST-3、qSST-5和qSST-11 ，分别位于第1，3，5，11号染色体上。4个QTLs的增效等位基因均来自于亲本南粳46。经比较发现有3个QTLs与已克隆水稻耐盐基因不在同一染色体区间，说明为新的耐盐基因候选位点。结果对进一步发掘和利用新的水稻耐盐QTL具有重要意义。

关键词: 水稻, 苗期, 耐盐, QTL

Abstract: The identification of salt tolerant genetic loci in rice can provide study basis for the molecular mechanism of salt tolerance and gene resources for improving salt tolerant cultivars. Recombinant inbred lines (RILs) derived from Zhaxima, a landrace indica variety from Yunnan Province and Nanjing 46, an elite japonica varirty with superior grain quality from Jiangsu Province were used. The salt tolerance at seedling stage of the RIL population were investigated as the phenotypic value. Combined with the linkage map, a total of 4 QTLs were detected: qSST-1，qSST-3，qSST-5 and qSST-11 ，located in rice chromosome 1, 3, 5 and 11, respectively. All positive alleles were from the parent Nanjing 46. These QTLs were not included in the same chromosome interval as the cloned rice salt tolerance genes, and thus were described as new candidate gene loci associated with seedling stage salt tolerance. The results supplies important information for further exploration and utilization of new salt tolerant QTLs in rice.

Key words: Oryza sativa L., Seedling stage, Salt tolerant, QTL

中图分类号:

S511.03

林静, 张云辉, 陈海元, 朱晓妹, 张所兵, 汪迎节, 方先文. 水稻地方品种苗期耐盐QTL的定位[J]. 华北农学报, 2019, 34(S1): 1-5. doi: 10.7668/hbnxb.201751449.

LIN Jing, ZHANG Yunhui, CHEN Haiyuan, ZHU Xiaomei, ZHANG Suobing, WANG Yingjie, FANG Xianwen. Mapping of Salt Tolerance QTLs at Seedling Stage of Landrace Rice[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 1-5. doi: 10.7668/hbnxb.201751449.

http://www.hbnxb.net/CN/Y2019/V34/IS1/1

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