数字农科院2.0

Co-domestication of cold tolerance and female flower is determined by CsEIN2 in cucumber.

文献类型： 外文期刊

作者： 李彩霞; 董邵云; 刘小萍; 官健涛; Beckles D.M.; 顾兴芳; 孙加强; 苗晗; 张圣平

关键词： cucumber; natural allelicvariation; CsEIN2; cold adaptation

期刊名称： PLANT BIOTECHNOLOGY JOURNAL

ISSN： 1467-7644

年卷期： 2025 年

页码：

收录情况： SCIE（2025版）

摘要： Survive and successful reproduction at cold stress are critical for cucumber adaptation toenvironmental conditions in high-latitude regions. However, the molecular basis for theco-domestication of cold adaptation and reproductive success in cucumber remains unknown.Here, we demonstrate that CsEIN2 acts as an indispensable hub in regulating both cold toleranceand female flower percentage (FFP) in cucumber. Specifically, we discover that three completelylinked natural variations at the C-terminus of CsEIN2, that is, the CsEIN2 CTC and CsEIN2 TCGhaplotypes determine the differences in cold tolerance and FFP. These variations affect theinteraction of CsEIN2 with the transcription factor CsEIN3, which activates the expression oftarget genes such as CsCBF2 and CsERF31 to regulate cold tolerance and FFP, respectively.Interestingly, the geographical distribution analyses show that the CsEIN2 CTC haplotype,conferring higher cold tolerance and FFP, underwent artificial selection for adaptation toenvironmental conditions in high-latitude regions. Further, we find that CsEIN2 is the only sexdetermination gene for selection of both cold tolerance and FFP. Collectively, our findings notonly establish CsEIN2 as a ‘hub’ regulator that enhances cold tolerance and FFP, but also providestarget gene for breeding.

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