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- Title
A large presence/absence variation in the promotor of the ClLOG gene determines trichome elongation in watermelon.
- Authors
Ma, Yuyuan; Wang, Yu; Zhou, Zhiqin; Zhang, Runqin; Xie, Yiru; Zhang, Yihan; Bo, Yongming; Lyu, Xiaolong; Yang, Jinghua; Zhang, Mingfang; Hu, Zhongyuan
- Abstract
Key message: The ClLOG gene encoding a cytokinin riboside 5ʹ-monophosphate phosphoribohydrolase determines trichome length in watermelon, which is associated with its promoter variations. Trichomes, which are differentiated from epidermal cells, are special accessory structures that cover the above-ground organs of plants and possibly contribute to biotic and abiotic stress resistance. Here, a bulked segregant analysis (BSA) of an F2 population with significant variations in trichome length was undertaken. A 1.84-Mb candidate region on chromosome 10 was associated with trichome length. Resequencing and fine-mapping analyses indicated that a 12-kb structural variation in the promoter of Cla97C10G203450 (ClLOG) led to a significant expression difference in this gene in watermelon lines with different trichome lengths. In addition, a virus-induced gene silencing analysis confirmed that ClLOG positively regulated trichome elongation. These findings provide new information and identify a potential target gene for controlling multicellular trichome elongation in watermelon.
- Subjects
WATERMELONS; GENE silencing; X chromosome; ABIOTIC stress; GENES; GENE expression
- Publication
Theoretical & Applied Genetics, 2024, Vol 137, Issue 5, p1
- ISSN
0040-5752
- Publication type
Article
- DOI
10.1007/s00122-024-04601-4