A High-Quality Chromosome-Level Genome Assembly of a Snail Cipangopaludina cathayensis (Gastropoda: Viviparidae)
文献类型： 外文期刊
作者： Ma, Benhe 1 ; Jin, Wu 3 ; Fu, Huiyun 1 ; Sun, Bing 5 ; Yang, Su 5 ; Ma, Xueyan 3 ; Wen, Haibo 3 ; Wu, Xiaoping 2 ; Wang, Haihua 1 ; Cao, Xiaojuan 5 ;
作者机构： 1.Jiangxi Fisheries Res Inst, Nanchang, Peoples R China
2.Nanchang Univ, Coll Life Sci, Nanchang 330031, Peoples R China
3.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Integrated Rice Fish Farming Ecol, Minist Agr & Rural Affairs, Wuxi 214081, Peoples R China
4.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214128, Peoples R China
5.Huazhong Agr Univ, Coll Fisheries, Engn Res Ctr Green Dev Convent Aquat Biol Ind Yang, Minist Educ, Wuhan 430070, Peoples R China
关键词： genome assembly; Cipangopaludina cathayensis; comparative genomics
期刊名称：GENES （ 影响因子：3.5； 五年影响因子：3.9 ）
ISSN：
年卷期： 2023 年 14 卷 7 期
页码：
收录情况： SCI
摘要： Cipangopaludina cathayensis (Gastropoda: Prosobranchia; Mesogastropoda; Viviparidae) is widely distributed in the freshwater habitats of China. It is an economically important snail with high edible and medicinal value. However, the genomic resources and the reference genome of this snail are lacking. In this study, we assembled the first chromosome-level genome of C. cathayensis. The preliminary assembly genome was 1.48 Gb in size, with a contig N50 size of 93.49 Mb. The assembled sequences were anchored to nine pseudochromosomes using Hi-C data. The final genome after Hi-C correction was 1.48 Gb, with a contig N50 of 98.49 Mb and scaffold N50 of 195.21 Mb. The anchored rate of the chromosome was 99.99%. A total of 22,702 protein-coding genes were predicted. Phylogenetic analyses indicated that C. cathayensis diverged with Bellamya purificata approximately 158.10 million years ago. There were 268 expanded and 505 contracted gene families in C. cathayensis when compared with its most recent common ancestor. Five putative genes under positive selection in C. cathayensis were identified (false discovery rate <0.05). These genome data provide a valuable resource for evolutionary studies of the family Viviparidae, and for the genetic improvement of C. cathayensis.
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