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Plant Physiology:黄瓜适应更高纬度地区的分子机制

已有 598 次阅读 2019-12-18 15:45 |个人分类:每日摘要|系统分类:论文交流

FLOWERING LOCUS T Improved Cucumber Adaptation to Higher Latitudes

First author: Shenhao Wang; Affiliations: Northwest A&F University (西北农林科技大学): Yangling, China

Corresponding author: Sanwen Huang

Flowering time plays a crucial role in the geographical adaptation of most crops during domestication. Cucumber (Cucumis sativus L.) is a major vegetable crop worldwide. From its tropical origin on the Southern Asian continent, cucumber has spread over a wide latitudinal cline, but the molecular mechanisms underlying this latitudinal adaptation and the expansion of domesticated cucumber are largely unclear. Here, we report the cloning of two flowering-time loci from two distinct cucumber populations, and show that two large deletions upstream from FLOWERING LOCUS T (FT) are associated with higher expression of FT and earlier flowering. We determined that the two large deletions are pervasive and occurred independently in Eurasian and East-Asian populations. Nucleotide diversity analysis further revealed that the FT locus region of the cucumber genome contains a signature for a selective sweep during domestication. Our results suggest that large genetic structural variations upstream from FT were selected for and have been important in the geographic spread of cucumber from its tropical origin to higher latitudes.


通讯:黄三文 (http://www.agis.org.cn/rcjs/cxtd/136716.htm)



doi: https://doi.org/10.1104/pp.19.01215

Journal: Plant Physiology

First Published: December 16, 2019



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