Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Thyroid hormones and antibody response sheep erythrocytes of dwarf and normal chickens selected for juvenile body weight | Génét. Sél. Evol. 1988 20 4 499-510 Thyroid hormones and antibody response to sheep erythrocytes of dwarf and normal chickens selected for juvenile body weight A. MARTIN . McNABB and . SIEGEL Virginia Polytechnic Institute and State University Blacksburg Virginia 24061 USA Summary Experiments were conducted in lines of chickens selected for high HW and low LW body weight to determine effects of dosage of antigen line sex-linked dwarfism and plasma thyroid hormone concentrations on antibody titers to sheep red blood cells SRBC . The greatest separation of lines and of dwarf-normal genotypes occurred with an intermediate dose ml of of SRBC. Five days after administration of SRBC at this dose antibody responses were greater for line LW than HW and in dwarf than normal chicks. The dwarf-normal but not the line relationship was evident for the booster challenge as well. Separation of lines and dwarf-normal genotypes for plasma thyroid hormone concentrations was greater at 71 than 36 days of age. Also the effect of the dwarfing allele on thyroid hormones was dependent on the background genome. There was no relationship between plasma triiodothyronine T and thyroxine T4 concentrations and antibody responses to SRBC. These data do not support the suggestions of a relationship between antibodies to SRBC and plasma T and T4. Key words chicken dwarf triiodothyronine Tj thyroxine T4 genetics. Résumé I Hormones thyroidiennes et production d anticorps contre des erythrocytes de mouton chez des poulets naìns et normaux sélectionnés pour leur poids corporel juvenile Nous avons effectue des experiences sur des lignées de poulets sélectionnés pour leur poids corporel haut HW OU bas LW en vue de determiner les effets du dosage d antigene de la lignée du nanisme lié au sexe et des concentrations sanguines des hormones thyro idiennes sur les anticorps aux globules rouges de mouton SRBC . Les plus grandes separations entre lignées et entre genotypes nains-normaux se .
