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Translocating individuals from multiple source populations is one way to bolster genetic variation and avoid inbreeding in newly established populations. However, mixing isolated populations, especially from islands, can potentially lead to outbreeding depression and/or assortative mating, which may limit interbreeding between source populations. Here, we investigated genetic consequences of mixing individuals from two island populations of the dibbler () in an island translocation.
View Article and Find Full Text PDFNon-random mating behaviour between diverging littoral and pelagic three-spined sticklebacks in an invasive population from Upper Lake Constance.
R Soc Open Sci
January 2025
Fisheries Research Station Baden-Württemberg, Argenweg 50/1, 88085 Langenargen, Germany.
Adaptive divergence and increased genetic differentiation among populations can lead to reproductive isolation. In Lake Constance, Germany, a population of invasive three-spined stickleback () is currently diverging into littoral and pelagic ecotypes, which both nest in the littoral zone. We hypothesized that assortative mating behaviour contributes to reproductive isolation between these ecotypes and performed a behavioural experiment in which females could choose between two nest-guarding males.
View Article and Find Full Text PDFIntraspecific variation and functional study of VERL polymorphism in Pacific abalone (Haliotis discus hannai Ino) and giant abalone (H. gigantea Gmelin).
Int J Biol Macromol
January 2025
State Key Laboratory of Mariculture Breeding, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China; Fujian Key Laboratory of Genetics and Breeding of Marine Organisms, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China. Electronic address:
Article Synopsis
- Sperm and eggs have specific proteins called gamete recognition proteins (GRPs) that influence their compatibility in fertilization, and this study focuses on the VERL receptor in two abalone species.
- The full-length VERL sequences were found to be different in Pacific abalone (11,373 bp) and giant abalone (9,405 bp), with variations in their amino acid compositions and repeats.
- Notably, the study discovered a relationship between VERL genotypes and mating preferences in giant abalone, highlighting amino acid diversity's role in fertilization and providing insights for improving abalone breeding practices.
Polygenic prediction of occupational status GWAS elucidates genetic and environmental interplay in intergenerational transmission, careers and health in UK Biobank.
Nat Hum Behav
December 2024
Leverhulme Centre for Demographic Science, Nuffield Department of Population Health and Nuffield College, University of Oxford, Oxford, UK.
Socioeconomic status (SES) impacts health and life-course outcomes. This genome-wide association study (GWAS) of sociologically informed occupational status measures (ISEI, SIOPS, CAMSIS) using the UK Biobank (N = 273,157) identified 106 independent single-nucleotide polymorphisms of which 8 are novel to the study of SES. Genetic correlations with educational attainment (r = 0.
View Article and Find Full Text PDFDivergence in expression of a singing-related neuro-plasticity gene in the brains of two Ficedula flycatchers and their hybrids.
G3 (Bethesda)
December 2024
Animal Ecology, Department of Ecology and Genetics, Uppsala University, 752 36 Uppsala, Sweden.
Species-specific sexual traits facilitate species-assortative mating by reducing mating across species and reducing hybrid sexual attractiveness. For learned sexual traits, such as song in oscine birds, species distinctiveness can be eroded when species co-occur. Transcriptional regulatory divergence in brain regions involved in sensory learning are hypothesized to maintain species distinctiveness, but relatively few studies have compared gene expression in relevant brain regions between closely related species.
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