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qCTB7 positively regulates cold tolerance at booting stage in rice

文献类型： 外文期刊

作者： Yang, Luomiao 1 ; Lei, Lei 2 ; Wang, Jingguo 1 ; Zheng, Hongliang 1 ; Xin, Wei 1 ; Liu, Hualong 1 ; Zou, Detang 1 ;

作者机构： 1.Northeast Agr Univ, Key Lab Germplasm Enhancement Physiol & Ecol Food, Minist Educ, Harbin 150030, Peoples R China

2.Heilongjiang Acad Agr Sci, Inst Crop Cultivat & Cultivat, Harbin 150086, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.4； 五年影响因子：5.7 ）

ISSN： 0040-5752

年卷期： 2023 年 136 卷 6 期

页码：

收录情况： SCI

摘要： Key messageLOC_Os07g07690 on qCTB7 is associated with cold tolerance at the booting stage in rice, and analysis of transgenic plants demonstrated that qCTB7 influenced cold tolerance by altering the morphology and cytoarchitecture of anthers and pollen.Cold tolerance at the booting stage (CTB) in rice can significantly affect yield in high-latitude regions. Although several CTB genes have been isolated, their ability to induce cold tolerance is insufficient to ensure adequate rice yields in cold regions at high latitudes. Here, we identified the PHD-finger domain-containing protein gene qCTB7 using QTL-seq and linkage analysis through systematic measurement of CTB differences and the spike fertility of the Longjing31 and Longdao3 cultivars, resulting in the derivation of 1570 F2 progeny under cold stress. We then characterized the function of qCTB7 in rice. It was found that overexpression of qCTB7 promoted CTB and the same yield as Longdao3 under normal growing conditions while the phenotype of qctb7 knockout showed anther and pollen failure under cold stress. When subjected to cold stress, the germination of qctb7 pollen on the stigma was reduced, resulting in lower spike fertility. These findings indicate that qCTB7 regulates the appearance, morphology, and cytoarchitecture of the anthers and pollen. Three SNPs in the promoter region and coding region of qCTB7 were identified as recognition signals for CTB in rice and could assist breeding efforts to improve cold tolerance for rice production in high latitudes.

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