Dataset Information

Genomic insights into local adaptation in the Asiatic toad Bufo gargarizans, and its genomic offset to climate warming.

ABSTRACT: Genomic signatures of local adaptation have been identified in many species but remain sparsely studied in amphibians. Here, we explored genome-wide divergence within the Asiatic toad, Bufo gargarizans, to study local adaptation and genomic offset (i.e., the mismatch between current and future genotype-environment relationships) under climate warming scenarios. We obtained high-quality SNP data for 94 Asiatic toads from 21 populations in China to study spatial patterns of genomic variation, local adaptation, and genomic offset to warming in this wide-ranging species. Population structure and genetic diversity analysis based on high-quality SNPs revealed three clusters of B. gargarizans in the western, central-eastern, and northeastern portions of the species' range in China. Populations generally dispersed along two migration routes, one from the west to the central-east and one from the central-east to the northeast. Both genetic diversity and pairwise F _ST were climatically correlated, and pairwise F _ST was also correlated with geographic distance. Spatial genomic patterns in B. gargarizans were determined by the local environment and geographic distance. Global warming will increase the extirpation risk of B. gargarizans.

SUBMITTER: Zhang LW

PROVIDER: S-EPMC10197391 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature

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Genomic insights into local adaptation in the Asiatic toad <i>Bufo gargarizans</i>, and its genomic offset to climate warming.

Zhang Lu-Wen LW Chen Jun-Qiong JQ Zhao Ru-Meng RM Zhong Jun J Lin Long-Hui LH Li Hong H Ji Xiang X Qu Yan-Fu YF

Evolutionary applications 20230502 5

Genomic signatures of local adaptation have been identified in many species but remain sparsely studied in amphibians. Here, we explored genome-wide divergence within the Asiatic toad, <i>Bufo gargarizans</i>, to study local adaptation and genomic offset (i.e., the mismatch between current and future genotype-environment relationships) under climate warming scenarios. We obtained high-quality SNP data for 94 Asiatic toads from 21 populations in China to study spatial patterns of genomic variatio ...[more]

PMID: 37216027

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Project description:Simple Summary In this study, the sexual dimorphism of the limb bones of the Asiatic toad was investigated. Despite male toads having smaller body lengths than females, they possess longer upper arms, forearms, thighs, calves, and feet. Additionally, the humerus and radioulna bones of males are heavier compared to females, and the protrusions on the humerus and femur of males are longer and higher than females. However, female toads have significantly longer hands than males. These sexual differences in limb morphology are believed to be adaptations to specific reproductive behaviors. We propose that the sexual dimorphism in the limb morphology of the Asiatic toad may be attributed to amplexus and male–male competition during the long process of adaptive evolution. Abstract Sexual dimorphism is often considered to be the result of differences in the intensity of sexual selection between sexes. From this point of view, the sexual dimorphism of the limb bones of the Bufo gargarizans in southwest China was studied. Results showed that the fore- and hindlimb skeletons of this species were sexually dimorphic in anatomy. The humerus, radioulna, and total lengths of the forelimb skeleton of males were substantially longer than those of females, but the hand length of males was smaller than that of females. Several other features of males, such as deltoid and medial crest areas and humerus and radioulnar weights, were also significantly larger than those of females. The femoris, tibiofibula, talus–calcaneus, and foot lengths; total hindlimb skeleton length; and femoral upper crest areas of males were significantly greater than those of females. However, no significant intersexual difference in femoris and tibiofibular weights was observed. These findings suggested that robust forelimb bones and long hindlimb bones could contribute to the mating success of males; if so, sexual selection promotes the evolution of sexual size and shape dimorphism in the limb bones of the B. gargarizans.

Dataset Information

Genomic insights into local adaptation in the Asiatic toad Bufo gargarizans, and its genomic offset to climate warming.

Publications

Genomic insights into local adaptation in the Asiatic toad <i>Bufo gargarizans</i>, and its genomic offset to climate warming.

Similar Datasets

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