多浪羊与和田羊初情期启动过程中生殖激素的变化规律

发布时间：2019-06-20 03:58

【摘要】：【目的】检测多浪羊与和田羊初情期启动过程中血清4种生殖激素(E2,FSH、LH、P4)的变化规律,为研究绵羊的初情期启动机制提供理论依据。【方法】利用公羊试情等方法对40只多浪羊与40只和田羊初情期年龄进行了鉴定;利用放射免疫分析技术对这2种绵羊2月龄、3月龄、初情期前、初情期(早期、中期、后期)、初情期后血清4种生殖激素的变化规律进行测定。【结果】多浪羊达到初情期的年龄约在4月龄,和田羊达到初情期的年龄约在8月龄。在幼年期至初情期的发育过程中,2种绵羊4种生殖激素变化趋势相似。多浪羊2月龄、3月龄血清E2浓度均显著高于和田羊(P0.05);多浪羊3月龄(初情期前)、初情期早期、中期血清FSH浓度均显著高于和田羊(P0.05),初情期后期血清P4浓度显著高于和田羊(P0.05)。多浪羊初情期后血清FSH、LH、P4浓度均显著高于和田羊(P0.05)。【结论】多浪羊初情期前高水平的E2、FSH可能与其初情期启动早相关,初情期后高水平的FSH浓度可能与其排卵数多、多胎性相关。
[Abstract]:[objective] to detect the changes of serum four reproductive hormones (E2, LH, P4) during the initial estrus of Dolang sheep and Hetian sheep, so as to provide theoretical basis for the study of the primordial initiation mechanism of sheep. [methods] the age of 40 Dolang sheep and 40 he-Tian sheep in the first estrus was identified by ram test. The changes of four reproductive hormones in serum of these two sheep at the age of 2 months, 3 months, before and after the first estrus (early, middle and late) and after the first estrus were measured by radioimmunoassay. [results] the age of reaching the first estrus of Dolang sheep was about 4 months old, and that of Hotan sheep was about 8 months old. During the development from infancy to first estrus, the change trend of 4 kinds of reproductive hormones in two kinds of sheep was similar. The serum E2 concentration of Dolang sheep at the age of 2 months and 3 months was significantly higher than that of Hetian sheep (P 0.05), and the serum FSH concentration of Dolang sheep at 3 months old (before first estrus), early and middle estrus was significantly higher than that of Hetian sheep (P 0.05), and the serum P4 concentration in early estrus was significantly higher than that in Hetian sheep (P 0.05). The serum FSH,LH,P4 concentration of Dolang sheep after first estrus was significantly higher than that of Hetian sheep (P 0.05). [conclusion] the high level of E2 in Dolang sheep before the initial estrus may be related to the initiation of the first estrus, and the high level of FSH after the first estrus may be related to the number of ovulatory and multiple fetuses.
【作者单位】：塔里木大学动物科学学院;新疆生产建设兵团塔里木畜牧科技重点实验室;
【基金】：国家自然科学基金项目(31660652) 兵团科技计划项目(2015AG013) 兵团塔里木畜牧科技重点实验室开放课题项目(HS2015010)
【分类号】：S826

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