Correlation Analysis of Cashmere Growth and Serum Levels of Thyroid Hormones in Hexi Cashmere Goats

文献类型： 外文期刊

第一作者： Sun, Xiaoping

作者： Sun, Xiaoping;Liu, Jianbin;Wei, Yunxia;Gao, Yaqin

作者机构：

关键词： Western China; Hexi Cashmere goat; growth and development; thyroid hormones; correlation study

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2018 年 20 卷 4 期

页码：

收录情况： SCI

摘要： The purpose of this study was to investigate the correlation between Cashmere growth and the changes of serum thyroid hormone levels in Hexi Cashmere goats in Western China. Forty (half male half female) six-month-old Hexi Cashmere goats with average body weight of 15.21 kg +/- 0.61 kg were studied. The root of the wool was dyed black. Wool samples and blood samples were collected monthly. The thyroid hormones in the blood samples were measured by radioimmunoassay. Results showed shown that the Cashmere started growing in August and stopped in December. August was found to be the fastest growing month for Cashmere (accounting for 28.0% of the annual growth). Cashmere growth from August through November accounted for 91.0% of the annual growth. Cashmere growth gradually declined after August and had completely stopped by January Assessments of serum thyroid hormone concentration showed that the concentration of T3 exhibited seasonal variation. It started to rise each year in February and peaked in September (7.52 ng/mL +/- 1.24 ng/mL). Then it gradually declined until the following February, when it reached the lowest value (3.77 ng/mL +/- 0.85 ng/mL) and the cycle was repeated. The serum T3 concentration was lowest in winter, moderate in spring and fall, and highest in summer. The T3 concentration was significantly higher in summer than in winter (P<0.01). The average T3 concentration was positively correlated with Cashmere growth during its peak period from August to December (r=0.955, P=0.011), which suggested that thyroid hormones are important for the germination and growth of Cashmere. (C) 2018 Friends Science Publishers

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