TAILIEUCHUNG - báo cáo khoa học: "Segregation of blood group factors in horses with special reference to maternal-fetal incompatibility"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Segregation of blood group factors in horses with special reference to maternal-fetal incompatibility | Génét. Sél. Evol. 1987 19 1 9-20 Segregation of blood group factors in horses with special reference to maternal-fetal incompatibility K. SANDBERG and L. ANDERSSON Department of Animal Breeding and Genetics Swedish University of Agricultural Sciences S-750 07 Uppsala Sweden Summary Segregation data on 15 blood group factors from 32 403 complete horse families were analysed. The horses belonged to the Swedish Trotter ST breed and the North-Swedish Trotter NST breed. The distribution of offspring from matings of sires heterozygous for a blood group factor and dams lacking the factor incompatible matings as well as from the reciprocal matings of heterozygous dams and negative sires compatible matings were analysed. In general there was good agreement between observed and expected segregation ratios. The extensive data available enabled the detection of even minor deviations from expectation. The most interesting observations were a an overall excess of heterozygous offspring from both types of matings in the ST breed and b a deficit of heterozygous offspring from incompatible matings for several factors in the NST breed. Possible explanations for these deviations from expected segregation ratios are discussed. There was no indication of a maternal-fetal incompatibility with regard to Aa and Qa the two factors known to be involved in the great majority of cases of neonatal isoerythrolysis in the horse. Key words Horse blood group factor segregation analysis maternal-fetal incompatibility. Résumé Segregation de facteurs sanguins chez le cheval en relation avec rincompatibilité foeto-maternelle Les segregations de 15 facteurs sanguins dans 32 403 families completes de chevaux sont analysées. Les chevaux appartiennent à la race du Trotteur suédois TS et à celle du Trotteur du Nord de la Suède TNS . La distribution de la progéniture de pères heterozygotes pour un facteur sanguin et de mères ne possédant pas ce facteur accouplements incompatibles et de celle resultant d .

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