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Photoperiodism, testosterone and adult neurogenesis in canaries (Serinus canaria).
J Neuroendocrinol
September 2024
GIGA Neurosciences, University of Liege, Liège, Belgium.
Domestic strains of canaries (Serinus canaria) variably respond to photoperiod changes and apparently stay in breeding state for extended periods. Fife Fancy canaries are supposed to be similar to the native species living at 27-39° north where photoperiod significantly changes across the year. Our birds showed reproductive cycles when exposed to light regimes mimicking the annual cycle of photoperiod.
View Article and Find Full Text PDFMorphological variation of tail bone among two chicken breeds and their F progeny.
J Morphol
May 2024
Department of Life and Food Sciences, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan.
Fancy breeds of Japanese indigenous chicken display extensive morphological diversity, particularly in tail feathers. Although marked differences in tail and bone traits have been reported between Tosa-jidori (wild type) and Minohikichabo (rich type) breeds, little is known about the pattern of genetic inheritance in cross experiments. Therefore, this study aimed to investigate the strain and sex effects, and inheritance patterns, in the morphometric variation of pygostyle bones among Tosa-jidori, Minohikichabo, and their F hybrids.
View Article and Find Full Text PDFWhole-genome selective sweep analyses identifies the region and candidate gene associated with white earlobe color in Mediterranean chickens.
Poult Sci
January 2024
Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden.
We compared the genomes of multiple domestic chicken breeds with red and white earlobes to identify the differentiated regions between groups of breeds differing in earlobe color. This was done using a selective sweep mapping approach based on whole-genome sequence data. The most significant selective sweep was identified on chromosome 11, where the white earlobe chicken breeds originated from Mediterranean share a common haplotype, and where multiple candidate genes are located.
View Article and Find Full Text PDFAvian Leukosis: Will We Be Able to Get Rid of It?
Animals (Basel)
July 2023
Department of Animal Health, Veterinary Faculty, Complutense University of Madrid, Av. Puerta de Hierro s/n, 28040 Madrid, Spain.
Avian leukosis viruses (ALVs) have been virtually eradicated from commercial poultry. However, some niches remain as pockets from which this group of viruses may reemerge and induce economic losses. Such is the case of fancy, hobby, backyard chickens and indigenous or native breeds, which are not as strictly inspected as commercial poultry and which have been found to harbor ALVs.
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