Localization of QTL for cold tolerance at the germination stage of rice (Oryza sativa L.) using recombinant inbred lines
文献类型： 外文期刊
作者： Cao, Liangzi 1 ; Jiang, Shukun 2 ; Ding, Guohua 2 ; Wang, Tongtong 2 ; Bai, Liangming 2 ; Zhou, Jinsong 2 ; Luo, Yu 2 ; Xia, Tianshu 2 ; Jiang, Hui 4 ; Liu, Kai 4 ; Wang, Xueyang 5 ; Yang, Guang 2 ; Sun, Shichen 2 ;
作者机构： 1.Heilongjiang Acad Agr Sci, Postdoctoral Sci Res Workstn, Harbin 150086, Peoples R China
2.Heilongjiang Acad Agr Sci, Inst Tillage & Cultivat, Harbin 250088, Peoples R China
3.Heilongjiang Rice Qual Improvement & Genet Breedi, Harbin 250086, Peoples R China
4.Heilongjiang Acad Agr Sci, Harbin 150086, Peoples R China
5.Heilongjiang Acad Agr Sci, Soybean Res Inst, Harbin 250086, Peoples R China
关键词： Rice; Cold tolerance at germination stage; QTL; Direct seeding
期刊名称：GENETIC RESOURCES AND CROP EVOLUTION （ 影响因子：1.876； 五年影响因子：1.864 ）
ISSN： 0925-9864
年卷期： 2022 年 69 卷 4 期
页码：
收录情况： SCI
摘要： The cold tolerance of germinating direct-sown rice (Oryza sativa L.) has an increased rate of emergence, which ensures vigorous seedling growth. Research on QTL localization for cold tolerance at the germination stage can assist in molecular marker-assisted selection and enhance breeding efficiency. In this study, 94 populations of recombinant self-incompatible lines from Heigu and Ha 9366 were selected to investigate germination rates at low temperatures. It was found that two QTL loci (qLTG-3 and qLTG-12) were located at different germination times on chromosomes 3 and 12, respectively. The two QTLs at three different germination times, located using QTL, accounted for 21.3-25.9% of the phenotypic variation. Moreover, a reciprocal effect was detected between the two QTLs. The double QTLs increased the germination rate by 22-27% in this population. Additionally, qLTG-12 improved cold tolerance at the seedling stage. The results of this study might provide the materials and molecular markers for future molecular marker-assisted breeding for cold tolerance at the germination stage.
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