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Random Mating in a Hybrid Zone Between Two Putative Climate-Adapted Bird Lineages With Predicted Mitonuclear Incompatibilities.
Mol Ecol
January 2025
School of Biological Sciences, Monash University, Clayton, Victoria, Australia.
Biochemical and evolutionary interactions between mitochondrial and nuclear genomes ('mitonuclear interactions') are proposed to underpin fundamental aspects of biology including evolution of sexual reproduction, adaptation and speciation. We investigated the role of pre-mating isolation in maintaining functional mitonuclear interactions in wild populations bearing diverged, putatively co-adapted mitonuclear genotypes. Two lineages of eastern yellow robin Eopsaltria australis-putatively climate-adapted to 'inland' and 'coastal' climates-differ by ~7% of mitogenome nucleotides, whereas nuclear genome differences are concentrated into a sex-linked region enriched with mitochondrial functions.
View Article and Find Full Text PDFY chromosome introgression between deeply divergent primate species.
Nat Commun
November 2024
Department of Biological Sciences, Florida Atlantic University, Boca Raton, FL, USA.
Hybridization and introgression are widespread in nature, with important implications for adaptation and speciation. Since heterogametic hybrids often have lower fitness than homogametic individuals, a phenomenon known as Haldane's rule, loci inherited strictly through the heterogametic sex rarely introgress. We focus on the Y-chromosomal history of guenons, African primates that hybridized extensively in the past.
View Article and Find Full Text PDFUnravelling the role of mitochondrial DNA in hybrid incompatibility within species of the Anopheles gambiae complex.
Sci Rep
November 2024
Department of Life Sciences, Imperial College London, London, UK.
Article Synopsis
- Isolation mechanisms in the Anopheles gambiae complex, important malaria vectors, include both pre-zygotic barriers reducing gene flow and post-zygotic issues like sterility in hybrid males and decreased fertility in hybrid females.
- Genetic studies have revealed that hybrid incompatibility is largely influenced by interactions on the X chromosome, while also noting differences in the fertility of hybrid males based on the direction of the cross.
- A study exploring the roles of mitochondrial DNA in hybrid incompatibilities found that switching mitochondrial DNA between species did not improve hybrid male fertility, suggesting it may not significantly contribute to these incompatibilities.
Survival cost sharing among altruistic full siblings in Mendelian population.
BMC Ecol Evol
November 2024
HUN-REN Alfréd Rényi Institute of Mathematics, Reáltanoda u. 13-15, Budapest, H-1085, Hungary.
Background: We focus on Haldane's familial selection in monogamous families in a diploid population, where the survival probability of each sibling is determined by altruistic food sharing with its siblings during starvation. An autosomal recessive-dominant or intermediate allele pair uniquely determines the altruistic or selfish behavior, which are coded by homozygotes. We focus on the case when additive cost and benefit functions determine the survival probability of each full sibling.
View Article and Find Full Text PDFCas9/guide RNA-based gene-drive dynamics following introduction and introgression into diverse anopheline mosquito genetic backgrounds.
BMC Genomics
November 2024
Department of Microbiology & Molecular Genetics, University of California, Irvine, CA, 92697-4025, USA.
Background: Novel technologies are needed to combat anopheline vectors of malaria parasites as the reductions in worldwide disease incidence has stalled in recent years. Gene drive-based approaches utilizing Cas9/guide RNA (gRNA) systems are being developed to suppress anopheline populations or modify them by increasing their refractoriness to the parasites. These systems rely on the successful cleavage of a chromosomal DNA target site followed by homology-directed repair (HDR) in germline cells to bias inheritance of the drive system.
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