Bunch T D, Foote W C
J Hered. 1976 May-Jun;67(3):167-70. doi: 10.1093/oxfordjournals.jhered.a108695.
Twelve breeds of Iranian domestic sheep were cytogenetically analyzed. The diploid chromosome number of 2n = 54 is identical to that of most breeds of domestic sheep, which is comprised of 3 pairs of metacentric and 23 pairs of acrocentric autosomes. The sex chromosomes consist of a large acrocentric X and a small bi-armed Y. Hemoglobin analysis by isoelectric focusing for these 12 breeds resulted in the identification of 2 protein fractions: Hb AB and B. The A allele was observed in 7 percent of the 506 sheep sampled, in 6 of the 12 breeds, and then only in the heterozygous form. Transferrins were analyzed by starch-gel electrophoresis and comparisons made between breeds. Nine alleles, pooled frequency of occurrence in descending order, B, C, D, A, M, E, G, P, and I were identified and resulted in 19 phenotypes. Tfs A, B, C, and D were observed in all breeds, whereas I was found in 2,G in 1, M in 8, E in 6, and P in 2. Significant differences in allelic occurrence of Tfs A, B, C, and D were observed in seven breeds.
对12个伊朗家养绵羊品种进行了细胞遗传学分析。其二倍体染色体数2n = 54，与大多数家养绵羊品种相同，由3对中着丝粒常染色体和23对端着丝粒常染色体组成。性染色体由一条大的端着丝粒X染色体和一条小的双臂Y染色体组成。对这12个品种进行等电聚焦血红蛋白分析，鉴定出2种蛋白质组分：Hb AB和B。在所采样的506只绵羊中，7%观察到A等位基因，在12个品种中的6个品种中出现，且仅以杂合形式存在。通过淀粉凝胶电泳分析转铁蛋白，并对品种间进行比较。鉴定出9个等位基因，按出现频率汇总后从高到低依次为B、C、D、A、M、E、G、P和I，产生了19种表型。在所有品种中均观察到Tfs A、B、C和D，而在2个品种中发现I，1个品种中发现G，8个品种中发现M，6个品种中发现E，2个品种中发现P。在7个品种中观察到Tfs A、B、C和D等位基因出现的显著差异。
