Whole genome sequencing of Crassostrea ariakensis (Mollusca: Ostreidae) and C. hongkongensis expands understandings of stress resistance in sessile oysters
Genomics. 2023 Dec 5:110757. doi: 10.1016/j.ygeno.2023.110757. Online ahead of print.ABSTRACTTo understand the environmental adaptations among sessile bivalves lacking adaptive immunity, a series of analyses were conducted, with special emphasis on the widely distributed C. ariakensis. Employing Pacbio sequencing and Hi-C technologies, whole genome for each of a C. ariakensis (southern China) and C. hongkongensis individual was generated, with the contig N50 reaching 6.2 and 13.0 Mb, respectively. Each genome harbored over 30,000 protein-coding genes, with approximately half of each genome consisting of repeats. Genome alignment suggested possible introgression between C. gigas and C. ariakensis (northern China), and re-sequencing data corroborated this result and indicated significant gene flow between C. gigas and C. ariakensis. These introgressed candidates, well-represented by genes related to immunity and osmotic pressure, may be associated with environmental stresses. Gene family dynamics modeling suggested immune-related genes were well represented among the expanded genes in C. ariakensis. These outcomes could be attributed to the spread of C. ariakensis.PMID:38061482 | DOI:10.1016/j.ygeno.2023.110757
Source: Genomics - Category: Genetics & Stem Cells Authors: Xingzhi Zhang Junliang Guan Ming Zou Pingping He Li Zhang Yongxian Chen Wei Li Dapeng Wang Ermeng Yu Fangjie Zhong Peng Zhu Xueyu Yan Youhou Xu Bang Luo Ting Huang Linyuan Jiang Pinyuan Wei Jinxia Peng Source Type: research