Separated Sexes, Shared Consequences: Disentangling Predictors of Genetic Diversity in Dioecious Angiosperms [PDF]
Ecology and EvolutionSexual systems such as dioecy, although rare in angiosperms, seem to enhance intrapopulation genetic diversity due to obligate outcrossing. Empirical studies had strengthened theoretical predictions that genetic diversity in dioecious angiosperms is ...
Thais Martins Teixeira +1 more
doaj +3 more sources
Evolutionary conservation of the grape sex-determining region in angiosperms and emergence of dioecy in Vitaceae. [PDF]
Nat CommunIn bunch grapes (Vitis spp.), flower sex is controlled by a ~ 200-kilobase sex-determining region (SDR) that contains genes involved in floral development. Here, we show that this region evolved from an ancient, highly conserved locus across angiosperms.
Massonnet M +6 more
europepmc +3 more sources
Dioecy in a wind-pollinated herb explained by disruptive selection on sex allocation via inbreeding avoidance. [PDF]
New PhytolThe evolution of dioecy from hermaphroditism is widely thought to be a response to disruptive selection favouring males and females, driven by advantages of inbreeding avoidance, sexual specialization, or both.
Chen KH, Pannell JR.
europepmc +2 more sources
The rapid dissolution of dioecy by experimental evolution.
Current Biology, 2021 Evolutionary transitions from hermaphroditism to dioecy have been common in flowering plants,1,2 but recent analysis also points to frequent reversions from dioecy to hermaphroditism.2-4 Here, we use experimental evolution to expose a mechanism for such ...
G. Cossard +4 more
semanticscholar +2 more sources
Dioecy Is Associated with High Genetic Diversity and Adaptation Rates in the Plant Genus Silene
Molecular biology and evolution, 2020 About 15,000 angiosperm species (∼6%) have separate sexes, a phenomenon known as dioecy. Why dioecious taxa are so rare is still an open question. Early work reported lower species richness in dioecious compared with nondioecious sister clades, raising ...
A. Muyle +11 more
semanticscholar +2 more sources
Bursts of Rapid Diversification, Dispersals Out of Southern Africa, and Two Origins of Dioecy Punctuate the Evolution of Asparagus. [PDF]
Genome Biol EvolThe genus Asparagus arose approximately 9–15 million years ago (Ma) and transitions from hermaphroditism to dioecy (separate sexes) occurred ∼3–4 Ma. Roughly 27% of extant Asparagus species are dioecious, while the remaining are bisexual with monoclinous
Bentz PC +10 more
europepmc +2 more sources
Multiple nuclear gene phylogenetic analysis of the evolution of dioecy and sex chromosomes in the genus Silene. [PDF]
PLoS ONE, 2011 In the plant genus Silene, separate sexes and sex chromosomes are believed to have evolved twice. Silene species that are wholly or largely hermaphroditic are assumed to represent the ancestral state from which dioecy evolved.
Gabriel A B Marais +5 more
doaj +2 more sources
Prickly Problems: Cylindropuntia's Low Genetic Diversity Despite Inbreeding Avoidance [PDF]
Ecology and EvolutionDioecy, the separation of sexes, is found in 6% of flowering plants. One widely known hypothesis suggests that it is an adaptation to mitigate inbreeding. A contrary hypothesis suggests that dioecy is an evolutionary dead end.
Niveditha Ramadoss +2 more
doaj +2 more sources
High incidence and correlates of dioecy in the flora of the Canadian Arctic Archipelago [PDF]
Arctic Science, 2017 In comparing the incidence of dioecy in North American floras, we report a strong, positive correlation with increasing latitude. Dioecy in the High Arctic is highly correlated with woodiness, as elsewhere.
Peter G. Kevan, Becky Godglick
doaj +2 more sources
Whole-genome sequencing reveals a possible molecular basis of sex determination in the dioecious wild yam Dioscorea tokoro. [PDF]
PLoS GeneticsDioecious plants, which have distinct male and female individuals, constitute ~5% of angiosperm species and have emerged frequently and independently from hermaphroditic ancestors.
Aoi Kudoh +17 more
doaj +2 more sources