QTL detection and candidate gene identification of qCTB1 for cold tolerance in the Yunnan plateau landrace rice

文献类型： 外文期刊

第一作者： Guo, Haifeng

作者： Guo, Haifeng;Zou, Andong;Khan, Najeeb Ullah;Gu, Yunsong;Li, Jin;Sun, Xingming;Zhang, Zhanying;Zhang, Hongliang;Li, Jinjie;Li, Zichao;Guo, Yongmei;Li, Huahui;Wu, Zhigang;Yuan, Pingrong;Zeng, Yawen;Guo, Haifeng;Peng, Youliang

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关键词： Rice; Cold tolerance; QTL analysis; QTL pyramiding; Candidate gene

期刊名称：MOLECULAR BREEDING （ 影响因子：2.6； 五年影响因子：2.7 ）

ISSN： 1380-3743

年卷期： 2024 年 44 卷 8 期

页码：

收录情况： SCI

摘要： Cold stress is one of the main abiotic stresses that affects rice growth and production worldwide. Dissection of the genetic basis is important for genetic improvement of cold tolerance in rice. In this study, a new source of cold-tolerant accession from the Yunnan plateau, Lijiangxiaoheigu, was used as the donor parent and crossed with a cold-sensitive cultivar, Deyou17, to develop recombinant inbred lines (RILs) for quantitative trait locus (QTL) analysis for cold tolerance at the early seedling and booting stages in rice. In total, three QTLs for cold tolerance at the early seedling stage on chromosomes 2 and 7, and four QTLs at the booting stage on chromosomes 1, 3, 5, and 7, were identified. Haplotype and linear regression analyses showed that QTL pyramiding based on the additive effect of these favorable loci has good potential for cold tolerance breeding. Effect assessment in the RIL and BC3F3 populations demonstrated that qCTB1 had a stable effect on cold tolerance at the booting stage in the genetic segregation populations. Under different cold stress conditions, qCTB1 was fine-mapped to a 341-kb interval between markers M3 and M4. Through the combination of parental sequence comparison, candidate gene-based association analysis, and tissue and cold-induced expression analyses, eight important candidate genes for qCTB1 were identified. This study will provide genetic resources for molecular breeding and gene cloning to improve cold tolerance in rice.

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