Gansu Key Laboratory of Herbivorous Animal Biotechnology, Instrumental Research and Analysis Center, Gansu Agricultural University, Lanzhou 730070, China.
Anat Rec (Hoboken). 2012 Sep;295(9):1520-8. doi: 10.1002/ar.22522. Epub 2012 Jul 2.
This experiment conducted to identify a periodic change of ultrastructures of secondary follicle characteristics during a whole year, reveal the molecule regulation of growth of cashmere. A total of 10 cashmere goats of 1-year old were studied. The paraffin section and ultrathin slices of skin were made each month in a whole year, observed, photographed, and analyzed under light microscope and transmission electron microscope after stained. Following the development of down fiber, the ultrastructures of secondary follicle of Hexi cashmere goat showed a periodic change within a year. There were five different periods during a down fiber cycle. It was observed that the stage of telogen, proanagen, anagen, procatagen, and catagen was in January and February, March and April, May to August, September and October, and November and December, respectively. The key change observed in secondary follicle under transmission electron microscope was inner root sheath. This study illustrated the five different stage of secondary follicle of Hexi Cashmere goat within a whole growth cycle, and has provided more detailed information about the research field of Hexi cashmere goat. Choosing the suitable time to harvest the cashmere may get the profit maximization.
本实验旨在鉴定一年中次级毛囊特征的超微结构周期性变化，揭示羊绒生长的分子调控机制。共选取 10 只 1 岁龄的绒山羊进行研究。全年每月制作皮肤石蜡切片和超薄切片，染色后在光镜和透射电镜下观察、拍照和分析。随着绒纤维的发育，河西绒山羊次级毛囊的超微结构在一年内呈现周期性变化。在一个绒纤维周期内有五个不同的时期。观察到休止期、前生长期、生长期、前退化期和退化期分别在 1 月和 2 月、3 月和 4 月、5 月至 8 月、9 月和 10 月以及 11 月和 12 月。在透射电镜下观察到次级毛囊的关键变化在内根鞘。本研究说明了河西绒山羊次级毛囊在整个生长周期内的五个不同阶段，为河西绒山羊的研究领域提供了更详细的信息。选择合适的时间收获羊绒可能会实现利润最大化。
