論文 - 詳細
| RRC ID | 69714 |
|---|---|
| 著者 | Whittington CM, Van Dyke JU, Liang SQT, Edwards SV, Shine R, Thompson MB, Grueber CE. |
| タイトル | Understanding the evolution of viviparity using intraspecific variation in reproductive mode and transitional forms of pregnancy. |
| ジャーナル | Biol Rev Camb Philos Soc |
| Abstract |
How innovations such as vision, flight and pregnancy evolve is a central question in evolutionary biology. Examination of transitional (intermediate) forms of these traits can help address this question, but these intermediate phenotypes are very rare in extant species. Here we explore the biology and evolution of transitional forms of pregnancy that are midway between the ancestral state of oviparity (egg-laying) and the derived state, viviparity (live birth). Transitional forms of pregnancy occur in only three vertebrates, all of which are lizard species that also display intraspecific variation in reproductive phenotype. In these lizards (Lerista bougainvillii, Saiphos equalis, and Zootoca vivipara), geographic variation of three reproductive forms occurs within a single species: oviparity, viviparity, and a transitional form of pregnancy. This phenomenon offers the valuable prospect of watching 'evolution in action'. In these species, it is possible to conduct comparative research using different reproductive forms that are not confounded by speciation, and are of relatively recent origin. We identify major proximate and ultimate questions that can be addressed in these species, and the genetic and genomic tools that can help us understand how transitional forms of pregnancy are produced, despite predicted fitness costs. We argue that these taxa represent an excellent prospect for understanding the major evolutionary shift between egg-laying and live birth, which is a fundamental innovation in the history of animals. |
| 巻・号 | 97(3) |
| ページ | 1179-1192 |
| 公開日 | 2022-1-30 |
| DOI | 10.1111/brv.12836 |
| PMID | 35098647 |
| PMC | PMC9064913 |
| MeSH | Animals Biological Evolution Lizards* / genetics Oviparity / genetics Reproduction / genetics Snakes Viviparity, Nonmammalian* / genetics |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 最多言及媒体 | X(Twitter) |
| 各媒体での言及数の合計 | 10 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| GBIF | Herpetological collection of National Museum of Nature and Science |