Elsevier eBooks, Год журнала: 2023, Номер unknown, С. 603 - 615
Опубликована: Ноя. 3, 2023
Язык: Английский
Philosophical Transactions of the Royal Society B Biological Sciences, Год журнала: 2021, Номер 376(1833), С. 20200097 - 20200097
Опубликована: Июль 25, 2021
Until recently, the field of sex chromosome evolution has been dominated by canonical unidirectional scenario, first developed Muller in 1918. This model postulates that chromosomes emerge from autosomes acquiring a sex-determining locus. Recombination reduction then expands outwards this locus, to maintain its linkage with sexually antagonistic/advantageous alleles, resulting Y or W degeneration and potentially culminating their disappearance. Based mostly on empirical vertebrate research, we challenge expand each conceptual step present observations numerous experts two parts theme issue
Язык: Английский
Процитировано
62
Molecular Ecology, Год журнала: 2025, Номер unknown
Опубликована: Фев. 10, 2025
This is a reference manual for the elegant, yet hideously complex concept of effective population size (Ne), inspired by classic, self-published automotive repair 'for compleat idiot'. The Guide timely, given recent Kunming-Montreal Global Biodiversity Framework, where 196 Parties committed to tracking genetic diversity-and estimating Ne-for all species. Ne human construct, but useful one that allows us capture diverse aspects an organism's biology in single number. collates location factual information about size, with focus on topics practical relevance scientists and managers studying real populations; it covers definition, computation estimation both demographically genetically. As appropriate, reader directed other primary sources more details. A 'Don't Do These Things' section lists several ill-advised approaches dealing Ne, Appendix provides tools suggestions interested users. special considers possibilities challenges presented genomics revolution. Availability vast numbers markers increases precision, less than some might think, simultaneously introduces new involving filtering bioinformatics processing. annotated genomes become common non-model species, opportunities are opened address qualitatively different questions, including reconstructing historical changes through time.
Язык: Английский
Процитировано
1
Communications Biology, Год журнала: 2025, Номер 8(1)
Опубликована: Март 30, 2025
Abstract The Neotropical armored catfish Harttia is a valuable model for studying sex chromosome evolution, featuring two independently evolved male-heterogametic systems. This study examined satellitomes—sets of satellite DNAs—from four Amazonian species: H. duriventris (X 1 X 2 Y), rondoni (XY), punctata and villasboas Y). These species share homologous chromosomes, with their satellitomes showing high number DNAs (satDNAs), primarily located on centromeres or telomeres, varying by species. Each revealed distinct satDNA profile, independent amplification homogenization events occurring, suggesting an important role these repetitive sequences in differentiation short evolutionary time, especially recently originated chromosomes. Whole painting bioinformatics that without heteromorphic specific (HviSat08-4011) amplified the same linkage group associated ancestral system. Such sequence has partial homology ZP4 gene responsible formation egg envelope, which its discussed. indicates chromosomes have diverged rapidly, recently, content, transposable elements playing minor when compared roles autosomal evolution.
Язык: Английский
Процитировано
0
Scientific Data, Год журнала: 2023, Номер 10(1)
Опубликована: Июнь 13, 2023
Abstract Wildlife exhibits various sex-determination systems where sex chromosomes and environmental temperatures may both contribute to individual sexual development. The causes consequences of this variability are important questions for evolutionary ecology, especially in light ongoing change. Amphibians reptiles emerging as a key group studying these questions, with new data accumulating acceleratingly. We collected empirical from earlier databases, reviews primary literature create the most up-to-date database on herpetological determination. named our HerpSexDet, which currently features genetic temperature-dependent determination well reports reversal total 192 amphibian 697 reptile species. This dataset, we will regularly update future, facilitates interspecific comparative studies evolution its species-specific traits such life history conservation status, also help guiding future research by identifying species or higher taxa that potentially enlightening study environmentally driven reversal.
Язык: Английский
Процитировано
10
BMC Genomics, Год журнала: 2021, Номер 22(1)
Опубликована: Ноя. 2, 2021
Abstract Background The genetic control of sex determination in teleost species is poorly understood. This partly because the diversity mechanisms that determine this large group vertebrates, including constitutive genes linked to chromosomes, polygenic mechanisms, environmental factors, hermaphroditism, and unisexuality. Here we use a de novo genome assembly New Zealand silver trevally ( Pseudocaranx georgianus ) together with sex-specific whole sequencing data detect sexually divergent genomic regions, identify candidate develop molecular makers. Results an unsexed (Trevally_v1) resulted final 579.4 Mb length, N50 25.2 Mb. Of assembled scaffolds, 24 were chromosome scale, ranging from 11 31 length. A total 28,416 annotated after 12.8 % was masked repetitive elements. Whole re-sequencing 13 wild sexed (seven males six females) identified two regions located on 6 kb region at proximal end 21. Blast analyses revealed similarity between one aromatase cyp19 (a1a/b) (E-value < 1.00E-25, identity > 78.8 %). Males contained higher numbers heterozygous variants both while females showed very low read-depth, indicative male-specificity region. Molecular markers developed subsequently tested 96 histologically-sexed fish (42 54 females). Three amplified absolute correspondence (positive males, negative Conclusions number combined absence these support XY sex-determination model, indicating trevally_v1 male specimen. system contrasts ZW model documented closely related carangid species. Our results indicate sex-determining function cyp19a1a -like gene, suggesting pathway somewhat conserved family. resources here will facilitate future comparative work, enable improved insights into varied pathways teleosts. marker study be valuable resource for aquaculture selective breeding programmes, determining ratios populations.
Язык: Английский
Процитировано
16
Frontiers in Cell and Developmental Biology, Год журнала: 2024, Номер 12
Опубликована: Янв. 23, 2024
Genes involved in gonadal sex differentiation have been traditionally thought to be fairly conserved across vertebrates, but this has lately questioned. Here, we performed the first comparative analysis of transcriptomes from fish mammals. Our results unambiguously show an extraordinary overall variability gene activation and repression programs without a phylogenetic pattern. During differentiation, genes such as dmrt1 , sox9 amh cyp19a foxl2 were consistently either male- or female-enriched species while many with greatest expression change within each not. We also found that downregulation opposite sex, which had only quantified mouse model, was prominent rest vertebrates. Finally, report 16 novel markers (e.g., fshr dazl ) 11 signaling pathways. propose viewing vertebrate hierarchical network, hub alongside less connected nodes. This proposed framework implies evolutionary pressures may impact based on their level connectivity.
Язык: Английский
Процитировано
2
Scientific Reports, Год журнала: 2024, Номер 14(1)
Опубликована: Фев. 28, 2024
Abstract Chameleons are well-known lizards with unique morphology and physiology, but their sex determination has remained poorly studied. Madagascan chameleons of the genus Furcifer have cytogenetically distinct Z W chromosomes occasionally 1 2 /Z multiple neo-sex chromosomes. To identify gene content chromosomes, we microdissected sequenced F. oustaleti (ZZ/ZW) pardalis (Z W). In addition, genomes a male female lateralis performed comparative coverage analysis between sexes. Despite notable heteromorphy distinctiveness in heterochromatin content, share approximately 90% content. This finding demonstrates poor correlation degree differentiation at cytogenetic level. The test homology based on comparison copy number variation revealed that heterogamety differentiated stable for least 20 million years. These co-opted role same genomic region as viviparous mammals, lacertids geckos Paroedura , which makes these groups excellent model studies convergent divergent evolution
Язык: Английский
Процитировано
2
Authorea (Authorea), Год журнала: 2024, Номер unknown
Опубликована: Сен. 3, 2024
This is a reference manual for the elegant, yet hideously complex concept of effective population size (Ne), inspired by classic, self-published automotive repair "for compleat idiot." Two early encounters with Ne are described, which (1) considered what it means to find statistically significant genetic drift, and (2) explored consequences expanding original discrete-generation species different life histories. The next section—Whither we drifting genomics Ne?—considers both possibilities challenges presented revolution. ready availability vast numbers markers increases precision, but not as much some might think. As annotated genomes become more common non-model species, opportunities opened address qualitatively questions, including reconstructing historical changes in through time. bulk paper brings together single location factual information about size, focus on practical relevance scientists managers studying real populations. Guide covers definition, computation, estimation demographically genetically. appropriate, reader directed other primary sources details. Finally, an Appendix provides useful tools suggestions interested users, closes section "Don't Do These Things" that lists number ill-advised approaches dealing Ne.
Язык: Английский
Процитировано
2
Trends in Ecology & Evolution, Год журнала: 2023, Номер 38(11), С. 1028 - 1040
Опубликована: Июнь 28, 2023
Traditionally, dominant breeders have been considered to be able control the reproduction of other individuals in multimember groups that high variance reproductive success/reproductive skew (e.g., forced sterility/coercion conspecifics eusocial animals; sex-change suppression sequential hermaphrodites). These actions are typically presented as active impositions by reproductively individuals. However, how can regulate physiology others? Alternatively, all contestants make decisions, and less successful self-downregulate presence breeders. Shifting perspective from a top-down manipulation broader view, which includes contenders, using multitaxon approach, we propose unifying framework for resolution conflicts based on signalling rather than control, along continuum levels strategic regulation reproduction.
Язык: Английский
Процитировано
6
Elsevier eBooks, Год журнала: 2024, Номер unknown, С. 283 - 306
Опубликована: Янв. 1, 2024
Язык: Английский
Процитировано
1