Contrast and Genomic Characterisation of Ancient and Recent Interspecific Introgression Between Deeply Diverged Moustache Toads (Leptobrachium) DOI
Jun Li,

Qingbo Ai,

Siyu Xie

et al.

Molecular Ecology, Journal Year: 2024, Volume and Issue: 33(23)

Published: Oct. 28, 2024

Recent genomic analyses have provided new insights into the process of interspecific introgression and its consequences on species evolution. Most recent studies, however, focused hybridization between recently radiated species, with few examining outcomes ancient across deeply diverged species. Using whole genome data moustache toads (Leptobrachium), we identified signals three events among nine that at Eocene. An from L. leishanense to ancestral branch (C1) liui introduced adaptive variants. The highly introgressed regions include genes important functions in odorant detection immune responses. These are preserved all descendent populations liui_C1, these likely been positively selected over a long filtering process. A occurred huashen tengchongense, being mostly neutral. Furthermore, one F1 hybrid individual was detected sympatric ailaonicum promustache. largely disappeared after removing individual, indicating an occasional but minimal introgression. Further examination divergent low revealed both pre-mating isolation genetic incompatibility as potential mechanisms resisting maintaining boundaries. Additionally, no large X-effect found events. Hybridization amphibian may be common, detectable introgressions less so, neutral rare potentially adaptive. Our findings complement work, together they provide better understanding characteristics significance adaptation

Language: Английский

Beyond Haldane’s rule: Sex-biased hybrid dysfunction for all modes of sex determination DOI Creative Commons
Asher D. Cutter

eLife, Journal Year: 2024, Volume and Issue: 13

Published: Aug. 19, 2024

Haldane's rule occupies a special place in biology as one of the few 'rules' speciation, with empirical support from hundreds species. And yet, its classic purview is restricted taxonomically to subset organisms heteromorphic sex chromosomes. I propose explicit acknowledgement generalized hypotheses about that frame bias hybrid dysfunction broadly and irrespective sexual system. The consensus view holds sex-biased across taxa composite phenomenon requires explanations multiple causes. Testing alternative for is, many cases, applicable homomorphic chromosomes, environmental determination, haplodiploidy, hermaphroditism. Integration variety biological phenomena hybrids diverse systems, beyond rule, will help derive more general understanding contributing forces mechanisms lead predictable biases evolutionary divergence speciation.

Language: Английский

Citations

2
Contrast and Genomic Characterisation of Ancient and Recent Interspecific Introgression Between Deeply Diverged Moustache Toads (Leptobrachium) DOI
Jun Li,

Qingbo Ai,

Siyu Xie

et al.

Molecular Ecology, Journal Year: 2024, Volume and Issue: 33(23)

Published: Oct. 28, 2024

Recent genomic analyses have provided new insights into the process of interspecific introgression and its consequences on species evolution. Most recent studies, however, focused hybridization between recently radiated species, with few examining outcomes ancient across deeply diverged species. Using whole genome data moustache toads (Leptobrachium), we identified signals three events among nine that at Eocene. An from L. leishanense to ancestral branch (C1) liui introduced adaptive variants. The highly introgressed regions include genes important functions in odorant detection immune responses. These are preserved all descendent populations liui_C1, these likely been positively selected over a long filtering process. A occurred huashen tengchongense, being mostly neutral. Furthermore, one F1 hybrid individual was detected sympatric ailaonicum promustache. largely disappeared after removing individual, indicating an occasional but minimal introgression. Further examination divergent low revealed both pre-mating isolation genetic incompatibility as potential mechanisms resisting maintaining boundaries. Additionally, no large X-effect found events. Hybridization amphibian may be common, detectable introgressions less so, neutral rare potentially adaptive. Our findings complement work, together they provide better understanding characteristics significance adaptation

Language: Английский

Citations

0