Avian sex determination is a multiple gene regulation cascade. Genes such as the Z chromosome-linked DMRT1 gene, W chromosome-linked PKCIW gene and other factors have been demonstrated to be involved in this process. In this paper, we review the recent progress in this field. The investigation of functions of sex determinate genes and methods of sexing identification in birds are also discussed.
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Zool Res
January 2025
Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, MOE Key Laboratory of Freshwater Fish Reproduction and Development, School of Life Sciences, Southwest University, Chongqing 400715, China. E-mail:
Avian genomes exhibit compact organization and remarkable chromosomal stability. However, the extent and mechanisms by which structural variation in avian genomes differ from those in other vertebrate lineages are poorly explored. This study generated a diploid genome assembly for the golden pheasant ( ), a species distinguished by the vibrant plumage of males.
View Article and Find Full Text PDFPhilos Trans R Soc Lond B Biol Sci
January 2025
School of Biodiversity, One Health & Veterinary Medicine, University of Glasgow, Glasgow G61 1QH, UK.
Birds have evolved seasonal adaptations in multiple aspects of the innate and adaptive immune systems. Seasonal immunological adaptations are crucial for survival in harsh environmental conditions and in response to increased prevalence of acute and chronic diseases. Similar to other vertebrates, birds exhibit remarkable plasticity in cytokine production, chemotaxis, phagocytosis and inflammation across the year.
View Article and Find Full Text PDFProc Biol Sci
January 2025
Department of Biodiversity, Ecology and Evolution, Complutense University of Madrid, Madrid, Spain.
Parasites have their strongest impact on fitness when host defences deplete resources needed for other critical life-history stages, such as development, breeding or migration. Among birds, one greatly neglected stage that could be altered by parasites is post-juvenile moult (PJM), through which yearling juvenile birds replace their fast-generated, low-quality juvenile feathers with adult-like feathers after leaving the nest. The earlier the birds complete PJM, the earlier they will be prepared to withstand forthcoming challenges, such as adverse winter conditions or migration.
View Article and Find Full Text PDFBehav Ecol Sociobiol
January 2025
CEFE, CNRS, Univ Montpellier, EPHE, IRD, Montpellier, France.
Abstract: Cooperative behaviour is widespread in animals and is likely to be the result of multiple selective pressures. A contentious hypothesis is that helping enhances the probability of obtaining a sexual partner (i.e.
View Article and Find Full Text PDFJ Anim Sci Biotechnol
January 2025
Frontiers Science Center for Molecular Design Breeding (MOE), State Key Laboratory of Animal Biotech Breeding, and National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China.
Background: Chickens and ducks are vital sources of animal protein for humans. Recent pangenome studies suggest that a single genome is insufficient to represent the genetic information of a species, highlighting the need for more comprehensive genomes. The bird genome has more than tens of microchromosomes, but comparative genomics, annotations, and the discovery of variations are hindered by inadequate telomere-to-telomere level assemblies.
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