The genome of African manatee Trichechus senegalensis reveals secondary adaptation to the aquatic environment.

ABSTRACT: Sirenians exhibit unique aquatic adaptations, showcasing both convergent adaptive features shared with cetaceans and unique characteristics such as cold sensitivity and dense bones. Here, we report a chromosome-level genome of the African manatee (Trichechus senegalensis) with high continuity, completeness, and accuracy. We found that genes associated with osteopetrosis have undergone positive selection (CSF1R and LRRK1) or pseudogenized (FAM111A and IGSF23) in the African manatee, potentially contributing to the dense bone formation. The loss of KCNK18 may have increased their sensitivity to cold water temperatures. Moreover, we identified convergent evolutionary signatures in 392 genes among fully aquatic mammals, primarily enriched in skin or sk

SUBMITTER: Huang X 

PROVIDER: S-EPMC11292518 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature