tailieunhanh - Báo cáo sinh học: "Phenotypic plasticity of body pigmentation in Drosophila: Dominant black in horses"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh Original cung cấp cho các bạn kiến thức về sinh học đề tài:Phenotypic plasticity of body pigmentation in Drosophila: Dominant black in horses. | 403 Genet Sei Evol 1997 29 403-408 Elsevier Inra Note Dominant black in horses DP Sponenberg MC Weise Department of Biosciences and Pathobiology Virginia-Maryland Regional College of Veterinary Medicine Virginia Tech Blacksburg VA 2406I 2714 Wocjik Ln Sobieski WI 54171 USA Received 20 January 1997 accepted 7 March 1997 Summary - The existence of dominant black in horses is supported by a black stallion producing 12 black or near black and no other color of foals from bay mares and 16 black or nearly black and no other color of foals from chestnut mares. This allele is suggested as being dominant black ED at the Extension locus. This allele does not always cause completely eumelanic phenotypes since some offspring which were heterozygous were near black rather than completely black. The dam of this stallion was of a near black or brown rather than black phenotype. The sire of this stallion was black. Foals were sometimes born a color close to that of bay foals but these ultimately turned completely or nearly black at maturity. color inheritance Extension locus dominant black horse Resume Noir dominant chez les chevaux. L existence d une coloration noire dominante chez les chevaux est mise en evidence par un etalon noir produisant 12 poulains de couleur noire OU presque à partir de juments bai et 16 poulains de couleur noire OU presque noire à partir de juments alezan. Cet allèle est suggéré être le noir dominant ED au locus Extension. Cet allele ne cause pas toujours des phenotypes eumélaniques puisque certains descendants qui étaient heterozygotes étaient presque noirs plutôt que complètement noirs. La mere de cet étalon était presque noire OU brune plutôt que noire. Le père de cet étalon était noir. Les poulains naissaient quelquefois avec une couleur proche de celle des poulains bai mats devenaient complètement OU presque noirs à la maturité. hérédité de la couleur locus Extension noir dominant chevaux INTRODUCTION The inheritance of color in horses has been .