Understanding the role of environmental temperature on sex determination through comparative studies in reptiles and amphibians

Author:

Akashi Hiroshi12,Hasui Daiki2,Ueda Kai2,Ishikawa Momoka2,Takeda Masayoshi3,Miyagawa Shinichi24

Affiliation:

1. Department of Integrated Biosciences The University of Tokyo Chiba Japan

2. Department of Biological Science and Technology, Faculty of Advanced Engineering Tokyo University of Science Tokyo Japan

3. Himeji City Aquarium Hyogo Japan

4. Research Institute for Science and Technology Tokyo University of Science Tokyo Japan

Abstract

AbstractIn vertebrates, species exhibit phenotypic plasticity of sex determination that the sex can plastically be determined by the external environmental temperature through a mechanism, temperature‐dependent sex determination (TSD). Temperature exerts influence over the direction of sexual differentiation pathways, resulting in distinct primary sex ratios in a temperature‐dependent manner. This review provides a summary of the thermal sensitivities associated with sex determination in reptiles and amphibians, with a focus on the pattern of TSD, gonadal differentiation, temperature sensing, and the molecular basis underlying thermal sensitivity in sex determination. Comparative studies across diverse lineages offer valuable insights into comprehending the evolution of sex determination as a phenotypic plasticity. While evidence of molecular mechanisms governing sexual differentiation pathways continues to accumulate, the intracellular signaling linking temperature sensing and sexual differentiation pathways remains elusive. We emphasize that uncovering these links is a key for understanding species‐specific thermal sensitivities in TSD and will contribute to a more comprehensive understanding of ecosystem and biodiversity conservations.

Funder

Ministry of Education, Culture, Sports, Science and Technology

Japan Society for the Promotion of Science

Publisher

Wiley

Subject

Genetics,Molecular Biology,Animal Science and Zoology,Physiology,Ecology, Evolution, Behavior and Systematics

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