tailieunhanh - báo cáo khoa học: " R-banding pattern of the prometaphase chromosomes of the domestic sheep Ovis aries L."

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: R-banding pattern of the prometaphase chromosomes of the domestic sheep Ovis aries L. | Genet. Sei. Evol. 1989 21 1-10 Elsevier INRA A. . . - c -Atiimshi - . . V 1 Original article R-banding pattern of the prometaphase chromosomes of the domestic sheep Ovis aries L. D. Di Berardino 1 . Lioi 2 c. Miranda1 A. Di Milia1 . D Agostino 1 and D. Matassino 1 1 University of Naples Department of Animal Production 80055 Portici Naples 2 University of Basilicata Institute of Animal Production 85100 Potenza Italy received 19-2-1988 accepted 5-5-1988 Summary The RBA-banding pattern of the domestic sheep Ovis aries L. and the diagrammatic representation at the 510 band stage are presented and proposed as the standard RBA-karyotype for this species. domestic sheep - RBA-banding - chromosomes Résumé Description des chromosomes marqués en bandes R du mouton domestique Ovis aries L. Les bandes R technique RBA des chromosomes du mouton domestique et son idio-gramme à 1 état de 510 bandes sont présentés et proposes comme le caryotype standard de cette espèce. mouton domestique - bandes R - chromosomes Introduction The discovery of the RBA-banding procedure by Dutrillaux et al. 1973 has provided a remarkable improvement in the identification and description of individual chromosomes of mammals including man. The benefits of this technique are quite evident in the family Bovidae whose chromosomes especially the smallest elements of the karyotype are not easily distinguishable when G-banded the difficulty lies in the fact that in Bovidae chromosomes both centromeres and telomeres are mostly G-negative and therefore the smallest autosomes have to be identified by relying upon very few and often undefined bands. The potential of the RBA-banding technique for definite identification of Bovidae chromosomes first pointed out by Popescu 1975 and by Gustavsson and Hagelthorn 1976 has subsequently been demonstrated by another series of studies on the R-ban-ding pattern of prometaphase chromosomes of Bos taurus L. Di Berardino eta . 1979 1985 Di Berardino and lannuzzi 1982