Inversions encounter relaxed genetic constraints and balance birth and death of TPS genes in Curcuma
文献类型： 外文期刊
作者： Liao, Xuezhu 1 ; Xie, Dejin 1 ; Bao, Tingting 1 ; Hou, Mengmeng 1 ; Li, Cheng 1 ; Nie, Bao 1 ; Sun, Shichao 1 ; Peng, Dan 1 ; Hu, Haixiao 2 ; Wang, Hongru 1 ; Tao, Yongfu 1 ; Zhang, Yu 3 ; Li, Wei 1 ; Wang, Li 1 ;
作者机构： 1.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Minist Agr & Rural Affairs, Guangdong Lab Lingnan Modern Agr,Key Lab Synthet B, Shenzhen 518120, Peoples R China
2.Univ Calif Davis, Dept Plant Sci, Davis, CA 95616 USA
3.Sun Yat Sen Univ, Sch Agr, Shenzhen 518107, Peoples R China
期刊名称：NATURE COMMUNICATIONS （ 影响因子：15.7； 五年影响因子：17.2 ）
ISSN：
年卷期： 2024 年 15 卷 1 期
页码：
收录情况： SCI
摘要： Evolutionary dynamics of inversion and its impact on biochemical traits are a puzzling question. Here, we show abundance of inversions in three Curcuma species (turmeric, hidden ginger and Siam tulip). Genes within inversions display higher long terminal repeat content and lower expression level compared with genomic background, suggesting inversions in Curcuma experience relaxed genetic constraints. It is corroborated by depletion of selected SNPs and enrichment of deleterious mutations in inversions detected among 56 Siam tulip cultivars. Functional verification of tandem duplicated terpene synthase (TPS) genes reveals that genes within inversions become pseudogenes, while genes outside retain catalytic function. Our findings suggest that inversions act as a counteracting force against tandem duplication in balancing birth and death of TPS genes and modulating terpenoid contents in Curcuma. This study provides an empirical example that inversions are likely not adaptive but affect biochemical traits. Evolutionary dynamics of inversions and their impact on biochemical traits are unclear. Here, the authors report the genome assemblies of three Curcuma species and find that terpene synthase genes quite often become pseudogenes inside an inversion, indicating inversions act as a counteracting force against gene tandem duplication.
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