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báo cáo khoa học: "A new reciprocal translocation involving chromosomes 1/14 in"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: A new reciprocal translocation involving chromosomes 1/14 in | Génét. Sél. Evol. 1987 19 3 381-386 Note A new reciprocal translocation involving chromosomes 1 14 in a boar c. TAROCCO Fabrizia FRANCHI and G. CROCI ỉstituto di Allevamenti Zootecnici Università di Bologna Reggio Emilia Italy Laboratorio di Genetica USL 9 Reggio Emilia Italy Summary A case of a boar with reduced fertility and carrier of a reciprocal balanced translocation involving chromosomes 1 and 14 is presented. High resolution chromosomes are analyzed and the break-points of the rearrangement are compared to those of the other cases of translocations in pigs involving chromosomes 1 or 14 or both. Key words Boar chromosome abnormality breakpoint. Résumé Une nouvelle translocation réciproque impliquant les chromosomes 1 et 14 chez un verrat Une nouvelle translocation réciproque impliquant les chromosomes 1 et 14 est décrite chez un verrat présentant une prolific té rédũite. Les chromosomes sont analysés avec une haute resolution et les points de cassure sont compares à ceux décrits chez le pore dans d autres cas de translocations impliquant les chromosomes 1 et 14 1 un des deux OU les deux simultanément . Mots clés Verrai anomalie chromosomique point de cassure. I. Introduction The structural chromosome abnormalities which most frequently affect the reproductive performance of the domestic pig seem to be reciprocal translocations. 382 c. TAROCCO Fabrizia FRANCHI G. CROCI As regards the chromosomal complement the carrier of a reciprocal balanced translocation may produce at meiosis 3 classes of gametes normal balanced and unbalanced. Fertilisation of an unbalanced gamete produces an embryo bearing duplications and defects which rarely survives. This leads to reduced litter size and hence a reduced fertility is the frequent consequence of heterozygosity due to a reciprocal translocation in the pig. To date 19 cases of translocations in pigs have been reported in the literature Popescu Boscher 1986 . The purpose of this work is to describe a translocation .