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牛生长激素基因变异与荷斯坦奶牛产奶性状的关联。

Association of genetic variants of bovine growth hormone with milk production traits in Holstein cattle.

机构信息

Centre for Food and Animal Research, Agriculture and Agri-Food Canada, Ottawa Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, Canada.

出版信息

J Anim Breed Genet. 1997 Jan 12;114(1-6):435-42. doi: 10.1111/j.1439-0388.1997.tb00529.x.

DOI:10.1111/j.1439-0388.1997.tb00529.x
PMID:21395837
Abstract

Gene and genotype frequencies of alleles, identified by PCR/RFLP technology, at leucine 127/valine127 (L/V) and C/D loci of the growth hormone gene of Ayrshire, Holstein and Jersey breeds were determined. The frequency of the V allele at the L/V mutation locus was 0.29, 0.09 and 0.24 for the Ayrshire, Holstein and Jersey breeds, respectively. The frequencies of the D allele at the C/D mutation locus were 0.00, 0.13 and 0.30 for the three breeds, respectively. Different growth hormone genotypes of Holstein AI bulls were compared for their estimated transmitting abilities (ETA) of milk, fat and protein yields using the samples of unrelated bulls and samples of the top, medium and bottom groups of ETA. The L/V locus was significantly (p < 0.05) associated with fat and protein ETAs of the selected groups and approached significance (p = 0.06) for milk ETA, with the V allele being more frequent in the top than in the bottom group of bulls. The C/D polymorphic locus was significantly (p = 0.02) associated with differences among the top, middle and bottom groups of bulls for milk ETA, but not significantly (p > 0.05) associated with fat and protein ETAs. The results suggest a possible association of growth hormone gene polymorphism with milk production traits in Holstein bulls. However, the results were not conclusive due to the small sample size and low frequencies of the V and D alleles. Much larger sample sizes are needed to obtain a reasonable number of VV and DD genotypes for a critical comparison. ZUSAMMENFASSUNG: Zusammenhang genetischer Varianten des Rinderwachstumshormons mit Milchleistungsmerkmalen bei Holstein Rindern Gene und Genotyp Frequenzen von Allelen, identifiziert mittels PCR/RFLP Technik, an Leucin(127) /Valin(127) (L/V) und C/D Loci des Wachtumshormon Genes wurden bei Ayrshire, Holstein und Jerseys bestimmt. Die Häufigkeiten des V Alleles waren 0.29, 0.09 und 0.24, jene des D Alleles 0, 0.13, und 0.30 bei den drei Rassen. Der Vergleich verschiedener Genotypen bei Holstein KB Stieren hinsichtlich geschätzter Nachkommenüberlegenheit (ETA) für Milch, Fett und Protein Mengen umfaßte Stiere mit hohen, mittleren und niedrigen ETA. Der L/V Locus zeigte statistisch signifikanten Einfluß bei Fettund ProteinETA und p = 0.06 bei Milch, wobei das V Allel in der Spitzengruppe häufiger als bei neidrigen war. Der C/D Locus war signifikant (p<0.02) mit Unterschieden hinsichtlich Milch, nicht aber mit jenen hinsichtlich Fett und Protein assoziiert. Die Ergebnisse deuten auf Zusammenhänge, jedoch beinträchtigt geringe Zahl der Tiere und niedrige Häufigkeit der V und D Allele allgemeine und bindende Schlußfolgerungen.

摘要

基因和基因型频率的等位基因,通过 PCR/RFLP 技术鉴定,在利氨酸 127/缬氨酸 127(L/V)和 C/D 生长激素基因的位置,在阿伯丁安格斯、荷斯坦和泽西牛品种中被确定。在 L/V 突变位置 V 等位基因的频率分别为 0.29、0.09 和 0.24,阿伯丁安格斯、荷斯坦和泽西牛品种。C/D 突变位置 D 等位基因的频率分别为 0.00、0.13 和 0.30,为这三个品种。不同的荷斯坦 AI 公牛生长激素基因型的估计传递能力(ETA)进行了比较,使用不相关公牛和顶部、中部和底部组 ETA 的样本进行比较。L/V 位点与所选组的脂肪和蛋白质 ETAs 显著相关(p <0.05),并接近牛奶 ETA 的显著性(p = 0.06),V 等位基因在顶部组比底部组更常见。C/D 多态性位点与公牛顶部、中部和底部组之间的差异显著相关(p = 0.02),但与脂肪和蛋白质 ETAs 不显著相关(p > 0.05)。结果表明,生长激素基因多态性与荷斯坦公牛产奶性能之间可能存在关联。然而,由于 V 和 D 等位基因的频率低,样本量小,结果并不具有结论性。需要更大的样本量才能获得足够数量的 VV 和 DD 基因型进行关键比较。

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