tailieunhanh - báo cáo khoa học: "Chromosome abnormalities in embryos from lines of Japanese quail divergently selected for body weight Vera D. WOLOWODIUK"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Chromosome abnormalities in embryos from lines of Japanese quail divergently selected for body weight Vera D. WOLOWODIUK | Génét. Sél. Evol. 1985 17 2 183-190 Chromosome abnormalities in embryos from lines of Japanese quail divergently selected for body weight 1 Vera D. WOLOWODIUK . FECHHEIMER 2 . NESTOR . BACON Department of Dairy Science The Ohio State University 2027 Coffey Road Columbus Ohio 43210 . Department of Genetics. Present address Department of Microbiology Rutgers University New Brunswick New Jersey Department of Poultry Science Ohio Agricultural Research and Development Center Wooster Ohio Summary Karyological analysis was made of 927 embryos from lines of Japanese quail coturnix divergently selected for body weight at 4 weeks of age and a randombred control line. Fertility of both selection lines was adversely affected. The sex proportion calculated as percentage of diploid embryos that was male was p. 100 p. 100. The line selected for high weight HW had significantly more heteroploid embryos than the randombred control RW or the low weight line LW The frequencies of heteroploid embryos were p. 100 in HW p. 100 in RW and p. 100 in LW. The entire difference was accounted for by an increased frequency of haploid diploid chimeras in HW p. 100 compared to RW p. 100 and LW p. 100 . Key words Japanese quail coturnix embryos chromosome abnormality heteroploidy. Resume Anomalies chromosomiques chez des embryons de caille japonaise soumise à une selection divergente sur le poids corporel Une analyse caryologique de 927 embryons de caille japonaise a été réalisée dans 2 lignées sélecíionnées de íaẹon divergente pour le poids corporel à 4 semaines et dans une lignee témoin. On a observé une reduction de la fertilite dans les 2 lignées sélec-tiọnnées. Le sex-ratio appréẹié par le pourcentage d embryons diplọĩdes males était de 52 6 p. 100 1 7 p. 100. La lignée haute sélectionnée pour un poids élevé HW présentait 1 Approved for publication as Journal Article No. 58-84 from the Ohio Agricultural Research and Development Center. Supported