Relationships between the First Ovulation Postpartum and Polymorphism in Genes Relating to Function of Immunity, Metabolism and Reproduction in High-producing Dairy Cows
スポンサーリンク
概要
- 論文の詳細を見る
The decrease in fertility and conception rates of high-producing dairy cows is one of the major negative impacts for todays producers. The recovery of ovarian activity postpartum is affected by the status of immunity, metabolism and reproduction and plays a critical role in subsequent fertility after parturition in the cow. In the present study we investigated the relationships between polymorphisms in genes relating to the above functions and the first postpartum ovulation as a marker of the recovery of ovarian function in the cow. In immune function related-factors, the occurrence of first postpartum ovulation within 3 weeks in the C/C genotypes of tumor necrosis factor α (TNFα) exon (55.4%) and the A/G genotypes of TNFα promoter (55.4%) was significantly higher than that in T/T genotypes of TNF α exon (14.3%) and A/A genotypes of TNFα promoter (14.3%). Moreover, anovulatory cows with the T/T genotype of TNFα exon and the A/A genotype of TNFα promoter tended to have a prolonged days open compared with those of the other genotypes of TNFα polymorphisms. In metabolic function-related factors, ovulatory and anovulatory cows had a different distribution for alleles of the growth hormone receptor, but there were no significant differences in genotype and allele frequency of insulin-like growth factor-I polymorphism. No significant relationships were found between ovarian function after parturition and SNPs for reproduction-related genes. In conclusion, polymorphisms of TNFα gene both in exon and promoter regions have a strong association with the early first ovulation within 3 weeks after parturition in the high-producing dairy cow. Taken together, polymorphisms of TNFα gene could be strongly related to early first ovulation after parturition, thus being an effective tool of selection for improving reproductive performance in the high-producing dairy cow.
論文 | ランダム
- 人材育成型 地域再生のリーダーをめざす『食農の匠』育成プログラム (期待される大学の地域貢献--地域連携・産学連携による共存のあり方を探る) -- (大学の地域貢献・産学連携の実態)
- 地域再生の現場を行く(第120回)酷寒の雪原で熱い雪合戦。冬場の観光客増やす効果(新潟県魚沼市、北海道壮瞥町)
- パネルディスカッション (岡山商科大・岡山自治体学会 地域再生シンポジウム)
- 基調講演 住民が提言、実行し持続可能な社会を (岡山商科大・岡山自治体学会 地域再生シンポジウム)
- 岡山商科大・岡山自治体学会 地域再生シンポジウム