Post-meiotic mechanism of facultative parthenogenesis in gonochoristic whiptail lizard species

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

Published: June 7, 2024

Facultative parthenogenesis (FP) has historically been regarded as rare in vertebrates, but recent years incidences have reported a growing list of fish, reptile, and bird species. Despite the increasing interest phenomenon, underlying mechanism evolutionary implications remained unclear. A common finding across many FP is either high degree homozygosity at microsatellite loci or low levels heterozygosity detected next-generation sequencing data. This led to proposal that second polar body fusion following meiotic divisions restores diploidy thereby mimics fertilization. Here, we show occurring gonochoristic Aspidoscelis species A. marmoratus arizonae results genome-wide homozygosity, an observation inconsistent with restoration. Instead, high-quality reference genome for analysis whole-genome from multiple control animals reveals post-meiotic gives rise homozygous haploid, unfertilized oocytes. Contrary widely held belief females need be isolated males undergo FP, housed conspecific heterospecific produced eggs underwent spontaneous development. In addition, offspring arising both fertilized parthenogenetic development were observed arise single clutch. Strikingly, our data support facultative removes all generation. Complete exposes genetic load explains rate congenital malformations embryonic mortality associated Conversely, develop normally, could potentially exert strong purifying selection lethal recessive alleles are purged

Language: Английский

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The evolutionary network of whiptail lizards reveals predictable outcomes of hybridization

Science, Journal Year: 2022, Volume and Issue: 377(6607), P. 773 - 777

Published: Aug. 11, 2022

Hybridization between diverging lineages is associated with the generation and loss of species diversity, introgression, adaptation, changes in reproductive mode, but it unknown when why results these divergent outcomes. We estimate a comprehensive evolutionary network for largest group unisexual vertebrates use to understand outcomes hybridization. Our show that rates introgression decrease time since divergence suggest must attain threshold before hybridization transitions unisexuality. Rates also predict genome-wide patterns genetic diversity whiptail lizards. These distinguish among models have not previously been tested can be predictable.

Language: Английский

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Mechanisms of Intrinsic Postzygotic Isolation: From Traditional Genic and Chromosomal Views to Genomic and Epigenetic Perspectives

Cold Spring Harbor Perspectives in Biology, Journal Year: 2023, Volume and Issue: 15(10), P. a041607 - a041607

Published: Sept. 11, 2023

Radka Reifová1, S. Lorena Ament-Velásquez2, Yann Bourgeois3, Jenn Coughlan4, Jonna Kulmuni5,6, Agnieszka P. Lipinska7,8, Genta Okude9, Laurie Stevison10, Kohta Yoshida9 and Jun Kitano9 1Department of Zoology, Faculty Science, Charles University, 128 00 Prague, Czech Republic 2Department Stockholm 106 91 Stockholm, Sweden 3DIADE, University Montpellier, CIRAD, IRD, 34090 France 4Department Ecology & Evolutionary Biology, Yale New Haven, Connecticut 06520, USA 5Institute for Biodiversity Ecosystem Dynamics, Department Population Amsterdam, 1012 The Netherlands 6Organismal Biology Research Programme, Helsinki, 00100 Finland 7Department Algal Development Evolution, Max Planck Institute 72076 Tuebingen, Germany 8CNRS, UMR 8227, Integrative Marine Models, Sorbonne Université, Station Biologique de Roscoff, 29680 9Department Genomics National Genetics, Mishima, Shizuoka 411-8540, Japan 10Department Biological Sciences, Auburn Auburn, Alabama 36849, Correspondence: radka.reifova{at}natur.cuni.cz; jkitano{at}nig.ac.jp

Language: Английский

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Phylogenomics of Psammodynastes and Buhoma (Elapoidea: Serpentes), with the description of a new Asian snake family

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: April 25, 2024

Abstract Asian mock vipers of the genus Psammodynastes and African forest snakes Buhoma are two genera belonging to snake superfamily Elapoidea. The phylogenetic placements within Elapoidea has been extremely unstable which resulted in their uncertain debated taxonomy. We used ultraconserved elements traditional nuclear mitochondrial markers infer relationships these with other elapoids. , for a reference genome sequenced, were found, strong branch support, be relatively early diverging split that is sister clade consisting Elapidae, Micrelapidae Lamprophiidae. Hence, we allocate its own family, Psammodynastidae new family . However, position could not resolved high degree confidence. Attempts identify possible sources conflict rapid radiation elapoid suggest both hybridisation/introgression during diversification, including ghost introgression, as well incomplete lineage sorting likely have had confounding role. usual practice combining loci genomic data appears mislead phylogeny reconstructions scenarios, especially absence scale data.

Language: Английский

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Natural repeated backcrosses lead to triploidy and tetraploidy in parthenogenetic butterfly lizards (Leiolepis: Agamidae)

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 24, 2025

Obligatory parthenogenesis in vertebrates is restricted to squamate reptiles and evolved through hybridisation. Parthenogens can hybridise with sexual species, resulting individuals increased ploidy levels. We describe two successive hybridisations of the parthenogenetic butterfly lizards (genus Leiolepis) Vietnam a parental species. Contrary previous proposals, we document that L. guentherpetersi has mitochondrial DNA haploid sets from guttata one reevesii, suggesting it result backcross × reevesii hybrid male increasing 2n 3n. Within range guentherpetersi, found an adult tetraploid three genomes. It probably originated fertilisation unreduced triploid egg by sperm. Although its external morphology resembles maternal possessed exceptionally large erythrocytes was likely sterile. As level above triploidy or tetraploidy appears be harmful for amniotes, all-female asexual lineages should evolve strategy prevent incorporation other genomes species avoiding males.

Language: Английский

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Speciation by hybridization: the mind-boggling nature, educational, and research value of the largest group of unisexual vertebrates

BioScience, Journal Year: 2025, Volume and Issue: 75(4), P. 331 - 341

Published: Jan. 17, 2025

Abstract Thirteen species of North American lizards are remarkable because only females exist, which reproduce by cloning unfertilized eggs. Their closest relatives sexually, with eggs fertilized sperm from males, as in most vertebrates. The unisexual originated through hybridization, dispensing sex and males a single generation. These hold tremendous potential science education fascinating model for learning about fundamental biological concepts, research developing knowledge medical applications reproductive biology, embryonic development, genetic interactions. maintain genome integrity hybrid state recombination is absent, but do not suffer conditions or disorders such Down's Syndrome cancer that caused aneuploidy humans. multifarious impacts hybridization on the diversity this group present an exceptional opportunity to deepen understanding complicated process evolutionary diversification.

Language: Английский

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Allopatric Speciation and Interspecific Gene Flow Driven by Niche Conservatism of Diploderma Tree Lizards in Taiwan

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

Allopatric speciation is a widely accepted hypothesis for species distributed across geographic barriers. Meanwhile, niche conservatism, the tendency of to retain their ancestral ecological traits, helps reinforce genetic differentiation by stabilising distributions over time and reducing role competition in shaping range boundaries. In contrast, hybridisation can occur at edges distribution after secondary contact following climatic or geological events, leading reduction divergence between divergent lineages. this study, we investigated barriers, conservatism gene flow history Diploderma Taiwan, where geographically distinct taxa share similar environmental preferences. By using ddRAD-seq data, seven clusters were identified with two putatively new cryptic D. brevipes polygonatum. Most sister pairs niches based on equivalency similarity tests. We further detected significant historical lineages polygonatum, might have occurred because palaeoclimate changes demographic expansion. Our results demonstrate that does not always act concert strengthen result allopatric speciation; instead, it may also lead contact. On other hand, postdivergence be creating force generating phenotypic diversity sexually selected traits our study system. The underestimated Taiwan requires taxonomic work future.

Language: Английский

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Exploring the Distribution of Phylogenetic Networks Generated Under a Birth-Death-Hybridization Process

Bulletin of the Society of Systematic Biologists, Journal Year: 2024, Volume and Issue: 2(3), P. 1 - 22

Published: March 15, 2024

Gene-flow processes such as hybridization and introgression play important roles in shaping diversity across the tree of life. Recent studies extending birth-death models have made it possible to investigate patterns reticulation a macroevolutionary context. These allow for different gene flow events that can either add, maintain, or remove lineages—with itself possibly being dependent on relatedness between species—thus creating complex diversification scenarios. Further, many reticulate phylogenetic inference methods assume specific structures phylogenies belonging certain network classes. However, distributions networks under are poorly characterized, is unknown whether they violate common methodological assumptions. We use simulation techniques explore space birth-death-hybridization process where rate linear dependence genetic distance. Specifically, we measured number lineages through time role along with proportion belong commonly used classes (e.g., tree-child, tree-based, level-1 networks). find growth class membership largely affected by assumptions about flow. In accordance previous studies, lower belonged these based type density events. process, factors form an antagonistic relationship; cause high proportions also lead highest density, consequently lowering overall some observed distance–dependent incomplete sampling increase membership, primarily due having fewer Our results inform if their biological expectations associated evolutionary histories satisfy current methodology aid finding relevant development.

Language: Английский

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The evolutionary outcomes of climate-change-induced hybridization in insect populations

Current Opinion in Insect Science, Journal Year: 2022, Volume and Issue: 54, P. 100966 - 100966

Published: Sept. 9, 2022

Language: Английский

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Interspecific gene flow obscures phylogenetic relationships in an important insect pest species complex

Molecular Phylogenetics and Evolution, Journal Year: 2023, Volume and Issue: 188, P. 107892 - 107892

Published: July 29, 2023

Language: Английский

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