Reproductive transitions in plants and animals: selfing syndrome, sexual selection and speciation
Tóm tắt
The evolution of predominant self‐fertilisation frequently coincides with the evolution of a collection of phenotypes that comprise the ‘selfing syndrome’, in both plants and animals. Genomic features also display a selfing syndrome. Selfing syndrome traits often involve changes to male and female reproductive characters that were subject to sexual selection and sexual conflict in the obligatorily outcrossing ancestor, including the gametic phase for both plants and animals. Rapid evolution of reproductive traits, due to both relaxed selection and directional selection under the new status of predominant selfing, lays the genetic groundwork for reproductive isolation. Consequently, shifts in sexual selection pressures coupled to transitions to selfing provide a powerful paradigm for investigating the speciation process. Plant and animal studies, however, emphasise distinct selective forces influencing reproductive‐mode transitions: genetic transmission advantage to selfing or reproductive assurance outweighing the costs of inbreeding depression vs the costs of males and meiosis. Here, I synthesise links between sexual selection, evolution of selfing and speciation, with particular focus on identifying commonalities and differences between plant and animal systems and pointing to areas warranting further synergy.
Từ khóa
Tài liệu tham khảo
Aalto EA, 2013, Cytoplasmic male sterility contributes to hybrid incompatibility between subspecies of Arabidopsis lyrata, G3: Genes|Genomes|Genetics, 3, 1727, 10.1534/g3.113.007815
Barrett SCH, 1993, The evolution and function of heterostyly, Oxford Surveys in Evolutionary Biology, 9, 283
BeaudryF BarrettSCH WrightSI.2019.Ancestral and neo‐sex chromosomes contribute to population divergence in a dioecious plant.bioRxiv: 550962.
Charnov EL, 1982, The theory of sex allocation
Fornoni J, 2015, A comparison of floral integration between selfing and outcrossing species: a meta‐analysis, Annals of Botany, 117, 299
Hamlin JAP, 2017, Two loci contribute epistastically to heterospecific pollen rejection, a postmating isolating barrier between species, G3 : Genes – Genomes – Genetics, 7, 2151, 10.1534/g3.117.041673
Ruane LG, 2009, Post‐pollination processes and non‐random mating among compatible mates, Evolutionary Ecology Research, 11, 1031
Ting JJ, 2018, Genetic contributions to ectopic sperm cell migration in Caenorhabditis nematodes, G3 : Genes – Genomes – Genetics, 8, 3891, 10.1534/g3.118.200785