Advanced

Climate-driven population divergence in sex-determining systems

Pen, Ido; Uller, Tobias LU ; Feldmeyer, Barbara; Harts, Anna; While, Geoffrey and Wapstra, Erik (2010) In Nature 468(7322). p.436-439
Abstract
Sex determination is a fundamental biological process, yet its mechanisms are remarkably diverse(1,2). In vertebrates, sex can be determined by inherited genetic factors or by the temperature experienced during embryonic development(2,3). However, the evolutionary causes of this diversity remain unknown. Here we show that live-bearing lizards at different climatic extremes of the species' distribution differ in their sex-determining mechanisms, with temperature-dependent sex determination in lowlands and genotypic sex determination in highlands. A theoretical model parameterized with field data accurately predicts this divergence in sex-determining systems and the consequence thereof for variation in cohort sex ratios among years.... (More)
Sex determination is a fundamental biological process, yet its mechanisms are remarkably diverse(1,2). In vertebrates, sex can be determined by inherited genetic factors or by the temperature experienced during embryonic development(2,3). However, the evolutionary causes of this diversity remain unknown. Here we show that live-bearing lizards at different climatic extremes of the species' distribution differ in their sex-determining mechanisms, with temperature-dependent sex determination in lowlands and genotypic sex determination in highlands. A theoretical model parameterized with field data accurately predicts this divergence in sex-determining systems and the consequence thereof for variation in cohort sex ratios among years. Furthermore, we show that divergent natural selection on sex determination across altitudes is caused by climatic effects on lizard life history and variation in the magnitude of between-year temperature fluctuations. Our results establish an adaptive explanation for intra-specific divergence in sex-determining systems driven by phenotypic plasticity and ecological selection, thereby providing a unifying framework for integrating the developmental, ecological and evolutionary basis for variation in vertebrate sex determination (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature
volume
468
issue
7322
pages
436 - 439
publisher
Nature Publishing Group
external identifiers
  • scopus:78549279075
ISSN
0028-0836
DOI
10.1038/nature09512
language
English
LU publication?
no
id
94dca220-05ef-4fcb-8fb9-031c2afddf8d (old id 4739073)
date added to LUP
2014-11-11 10:40:16
date last changed
2018-07-15 03:07:10
@article{94dca220-05ef-4fcb-8fb9-031c2afddf8d,
  abstract     = {Sex determination is a fundamental biological process, yet its mechanisms are remarkably diverse(1,2). In vertebrates, sex can be determined by inherited genetic factors or by the temperature experienced during embryonic development(2,3). However, the evolutionary causes of this diversity remain unknown. Here we show that live-bearing lizards at different climatic extremes of the species' distribution differ in their sex-determining mechanisms, with temperature-dependent sex determination in lowlands and genotypic sex determination in highlands. A theoretical model parameterized with field data accurately predicts this divergence in sex-determining systems and the consequence thereof for variation in cohort sex ratios among years. Furthermore, we show that divergent natural selection on sex determination across altitudes is caused by climatic effects on lizard life history and variation in the magnitude of between-year temperature fluctuations. Our results establish an adaptive explanation for intra-specific divergence in sex-determining systems driven by phenotypic plasticity and ecological selection, thereby providing a unifying framework for integrating the developmental, ecological and evolutionary basis for variation in vertebrate sex determination},
  author       = {Pen, Ido and Uller, Tobias and Feldmeyer, Barbara and Harts, Anna and While, Geoffrey and Wapstra, Erik},
  issn         = {0028-0836},
  language     = {eng},
  number       = {7322},
  pages        = {436--439},
  publisher    = {Nature Publishing Group},
  series       = {Nature},
  title        = {Climate-driven population divergence in sex-determining systems},
  url          = {http://dx.doi.org/10.1038/nature09512},
  volume       = {468},
  year         = {2010},
}