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001-es BibID:BIBFORM096013
Első szerző:Miklós Máté (biológus)
Cím:Phenotypic plasticity rather than genotype drives reproductive choices in Hydra populations / Máté Miklós, Levente Laczkó, Gábor Sramkó, Flóra Sebestyén, Zoltán Barta, Jácint Tökölyi
Dátum:2021
ISSN:0962-1083
Megjegyzések:Facultative clonality is associated with complex life cycles where sexual and asexual forms can be exposed to contrasting selection pressures. Facultatively clonal animals often have distinct developmental capabilities that depend on reproductive mode (e.g., negligible senescence and exceptional regeneration ability in asexual individuals, which are lacking in sexual individuals). Understanding how these differences in life history strategies evolved is hampered by limited knowledge of the population structure underlying sexual and asexual forms in nature. Here we studied genetic differentiation of coexisting sexual and asexual Hydra oligactis polyps, a freshwater cnidarian where reproductive mode-dependent life history patterns are observed. We collected asexual and sexual polyps from 13 Central European water bodies and used restriction-site associated DNA sequencing to infer population structure. We detected high relatedness among populations and signs that hydras might spread with resting eggs through zoochory. We found no genetic structure with respect to mode of reproduction (asexual vs. sexual). On the other hand, clear evidence was found for phenotypic plasticity in mode of reproduction, as polyps inferred to be clones differed in reproductive mode. Moreover, we detected two cases of apparent sex change (males and females found within the same clonal lineages) in this species with supposedly stable sexes. Our study describes population genetic structure in Hydra for the first time, highlights the role of phenotypic plasticity in generating patterns of life history variation, and contributes to understanding the evolution of reproductive mode-dependent life history variation in coexisting asexual and sexual forms.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
clonal reproduction
eco-evo- devo
phenotypic plasticity
population genomics
RAD-seq
sex change
Megjelenés:Molecular Ecology. - 30 : 5 (2021), p. 1206-1222. -
További szerzők:Laczkó Levente (1992-) (biológus) Sramkó Gábor (1981-) (biológus) Sebestyén Flóra (1993-) (biológus) Barta Zoltán (1967-) (biológus, zoológus) Tökölyi Jácint (1984-) (biológus)
Pályázati támogatás:NKFIH FK 124164
Egyéb
ÚNKP-19- 3
Egyéb
ÚNKP-19- 4
Egyéb
János Bolyai Research Scholarship of the Hungarian Academy of Sciences
Egyéb
Higher Education Institutional Excellence Program of the Ministry of Human Capacities in Hungary, FIK-Lendület Behavioral Ecology Research Group
Egyéb
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001-es BibID:BIBFORM108220
035-os BibID:(WOS)000760111100001 (Scopus)85125107553
Első szerző:Nemesházi Edina
Cím:Novel genetic sex markers reveal unexpected lack of, and similar susceptibility to, sex reversal in free-living common toads in both natural and anthropogenic habitats / Edina Nemesházi, Gábor Sramkó, Levente Laczkó, Emese Balogh, Lajos Szatmári, Nóra Vili, Nikolett Ujhegyi, Bálint Üveges, Veronika Bókony
Dátum:2022
ISSN:0962-1083
Megjegyzések:Anthropogenic environmental changes are affecting biodiversity and microevolution worldwide. Ectothermic vertebrates are especially vulnerable because environmental changes can disrupt their sexual development and cause sex reversal, a mismatch between genetic and phenotypic sex. This can potentially lead to sex-ratio distortion and population decline. Despite these implications, there is scarce empirical knowledge on the incidence of sex reversal in nature. Populations in anthropogenic environments may be exposed to sex-reversing stimuli more frequently, which may lead to higher sex-reversal rate or, alternatively, these populations may adapt to resist sex reversal. We developed PCR-based genetic sex markers for the common toad (Bufo bufo) to assess the prevalence of sex reversal in wild populations living in natural, agricultural and urban habitats, and the susceptibility of the same populations to two ubiquitous oestrogenic pollutants in a common garden experiment. We found negligible sex-reversal frequency in free-living adults despite the presence of various endocrine-disrupting pollutants in their breeding ponds. Individuals from different habitat types showed similar susceptibility to sex reversal in the laboratory: all genetic males developed female phenotype when exposed to 1 mu g L-1 17 alpha-ethinylestradiol (EE2) during larval development, whereas no sex reversal occurred in response to 1 ng L-1 EE2 and a glyphosate-based herbicide with 3 mu g L-1 or 3 mg L-1 glyphosate. The latter results do not support that populations in anthropogenic habitats would have either increased propensity for or higher tolerance to chemically induced sex reversal. Thus, the extremely low sex-reversal frequency in wild toads compared to other ectothermic vertebrates studied before might indicate idiosyncratic, potentially species-specific resistance to sex reversal.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Molecular Ecology. - 31 : 7 (2022), p. 2032-2043. -
További szerzők:Sramkó Gábor (1981-) (biológus) Laczkó Levente (1992-) (biológus) Balogh Emese Szatmári Lajos Vili Nóra Ujhegyi Nikolett Üveges Bálint (1984-) (biológus, ökológus) Bókony Veronika (alkalmazott zoológus)
Pályázati támogatás:OTKA FK137962
OTKA
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