Loss of phenotypic plasticity generates genotype-caste association in harvester antsSara Helms Cahan
Department of Ecology and Evolution, University of Lausanne, CH 1015 Lausanne, Switzerland
Curr Biol 14:2277-82. 2004
..Our results reveal that genetic control of reproductive fate can persist without loss of the eusocial caste structure...
Maternal effect on female caste determination in a social insectTanja Schwander
Department of Ecology and Evolution, Biophore, University of Lausanne, CH 1015 Lausanne, Switzerland
Curr Biol 18:265-9. 2008
..Altogether these data demonstrate that the developmental fate of female brood is strongly influenced by maternal effects in ants of the genus Pogonomyrmex...
- Genetic compatibility affects queen and worker caste determination
Tanja Schwander
Department of Ecology and Evolution, University of Lausanne, CH 1015 Lausanne, Switzerland
Science 322:552. 2008
..Genetic interaction effects on caste may be maintained over evolutionary time because the fitness of an allele depends on its genetic background...
- Twigs on the tree of life? Neutral and selective models for integrating macroevolutionary patterns with microevolutionary processes in the analysis of asexuality
Tanja Schwander
Department of Biological Sciences, Simon Fraser University, Burnaby BC, Canada
Mol Ecol 18:28-42. 2009
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Positive feedback in the transition from sexual reproduction to parthenogenesisTanja Schwander
Biological Sciences, Simon Fraser University, Burnaby, Canada
Proc Biol Sci 277:1435-42. 2010
..Our model and data from Timema populations provide evidence for a simple mechanism through which parthenogenesis can evolve rapidly in a sexual population...
- Evolution: sociality as a driver of unorthodox reproduction
Tanja Schwander
University of Groningen, Center for Ecological and Evolutionary Studies, 9700CC Groningen, The Netherlands
Curr Biol 22:R525-7. 2012
..The system appears to be doomed to extinction...
- Molecular evidence for ancient asexuality in timema stick insects
Tanja Schwander
Simon Fraser University, Biological Sciences, Burnaby, BC V5A 1S6, Canada
Curr Biol 21:1129-34. 2011
..These data strongly support ancient asexuality in Timema and validate the genus as an exceptional opportunity to attack the question of how asexual reproduction can be maintained over long periods of evolutionary time...
- Genes as leaders and followers in evolution
Tanja Schwander
Evolutionary Genetics, Centre for Ecological and Evolutionary Studies, University of Groningen, 9700 CC Groningen, The Netherlands
Trends Ecol Evol 26:143-51. 2011
..We argue in this review that to evaluate the prevalence of each route, an investigation of both genetic and environmental cues for phenotype determination in several related rather than in isolated species is required...
- Non-random autosome segregation: a stepping stone for the evolution of sex chromosome complexes? Sex-biased transmission of autosomes could facilitate the spread of antagonistic alleles, and generate sex-chromosome systems with multiple X or Y chromosomes
Tanja Schwander
Evolutionary Genetics, Center for Ecological and Evolutionary Studies, University of Groningen, Groningen, The Netherlands
Bioessays 33:111-4. 2011
..This may provide a first step toward the evolution of new sex determination systems...
- Nature versus nurture in social insect caste differentiation
Tanja Schwander
Simon Fraser University, Biological Sciences, 8888 University Drive, Burnaby V5A1S6, Canada
Trends Ecol Evol 25:275-82. 2010
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- Multiple direct transitions from sexual reproduction to apomictic parthenogenesis in Timema stick insects
Tanja Schwander
Department of Biological Sciences, Simon Fraser University, Burnaby BC
Evolution 63:84-103. 2009
..Because both of these traits should positively affect the demographic success of asexual lineages, spontaneous apomixis may have contributed to the origin and maintenance of asexuality in Timema...
- Mechanisms of reproductive isolation between an ant species of hybrid origin and one of its parents
Tanja Schwander
Department of Ecology and Evolution, University of Lausanne, CH 1015 Lausanne, Switzerland
Evolution 62:1635-43. 2008
..5%) RI between P. rugosus and the two hybrid lineages stems from the combination of two typical prezygotic mechanisms (mating time divergence and assortative mating) and one postzygotic mechanism (hybrid inviability)...
- Characterization and distribution of Pogonomyrmex harvester ant lineages with genetic caste determination
Tanja Schwander
Department of Ecology and Evolution, University of Lausanne, CH 1015 Lausanne, Switzerland
Mol Ecol 16:367-87. 2007
..Such nearly complete reproductive isolation between the lineages and the species with environmental caste determination might prevent the genetic caste determination system to be swept away by gene flow...
- Two alternate mechanisms contribute to the persistence of interdependent lineages in Pogonomyrmex harvester ants
Tanja Schwander
Department of Ecology and Evolution, University of Lausanne, CH 1015 Lausanne, Switzerland
Mol Ecol 16:3533-43. 2007
..Hence, two distinct mechanisms seem to account for the complete lack of between-lineage gene flow in the F(1)-F(2), G(1)-G(2), H(1)-H(2) and J(1)-J(2) lineage pairs...
- Genetic components to caste allocation in a multiple-queen ant species
Romain Libbrecht
Department of Ecology and Evolution, Biophore Building, University of Lausanne, CH 1015 Lausanne, Switzerland
Evolution 65:2907-15. 2011
..In addition to revealing nonadditive genetic effects on female caste determination in a multiple-queen ant species, this study reveals strong genetic compatibility effects between parental genomes on caste allocation components...
- Reproductive isolation between Pogonomyrmex rugosus and two lineages with genetic caste determination
Sara Helms Cahan
Department of Biology, University of Vermont, Burlington, Vermont 05405, USA
Ecology 87:2160-70. 2006
..This suggests that ecological competition with the parent species plays a significant role in determining the evolutionary persistence and current distribution of the hybrid lineages and the genetic caste system...
