Phenotypic associations with fibre curvature standard deviation in cashmere
Phenotypic associations with fibre curvature standard deviation in cashmere
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DOI：
10.1016/j.smallrumres.2010.03.014
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发表时间：
2010-07-01
影响因子：
1.8
通讯作者：
Butler, K. L.
中科院分区：
文献类型：
--
作者：
McGregor, B. A.;Butler, K. L.
羊绒纤维卷曲度直接影响羊绒纺织品的柔软性和质量，影响羊绒加工和生产的效率。本研究探讨了羊绒纤维曲率标准偏差（FCSD）和其他羊毛属性之间的关系，以及这种关系如何与动物和农场属性不同，在澳大利亚的10个商业羊绒羊群。使用一般线性模型分析数据。记录了1168只山羊的19个参数。经对数转换后，FCSD的最佳模型包括农场、山羊年龄、平均纤维直径、纤维曲率、纤维直径标准差、产绒量、绒毛长度和活重以及这些项之间的交互作用。解释的百分比方差为82%。平均纤维直径和纤维曲率占FCSD变异的55%，农场占变异的41%。累计平均纤维直径，纤维曲率和农场占75%的变异存在于FCSD。对于其他项，年龄增加了2%，其余测量值增加了5%，以解释最佳模型的变化。环境（农场影响）对FCSD的影响很大，这可以解释羊绒种植者在评估羊绒山羊时遇到的困难。增加羊绒纤维曲率与羊绒FCSD的增加有关，但对于农场和MFD的某些组合，FCSD的增加约为35度/mm，而对于其他组合，随着纤维曲率的增加，FCSD的增加约为5度/mm。在一个给定的纤维曲率的FCSD平均纤维直径的响应农场之间的差异很大，从强负到强正。羊绒产量从20%增加到55%与FCSD下降有关。增加纤维直径SD从3到5 μ m增加FCSD 6度/毫米，增加纤维长度和活重与FCSD的小幅下降。有强有力的证据表明，年龄效应与农场不同，但随着年龄的增加，FCSD几乎没有明显的趋势。结果表明，农场为基础的影响是影响点的纤维角化完成，从而影响FCSD的变化。我们的结论是，由于农场之间的差异的关系是纤维曲率标准差，平均纤维直径和纤维曲率是很大的，这是不太可能的卷曲率和卷曲定义将是良好的指标，羊绒细度在农场。皇冠版权所有（C）2010由爱思唯尔B. V.出版保留所有权利。
Cashmere fibre curvature (crimp) impacts on the softness and quality of cashmere textiles, the efficiency of cashmere processing and cashmere production. This study investigated the relationship between cashmere fibre curvature standard deviation (FCSD) and other fleece attributes, and how this relationship differs with animal and farm attributes, for 10 commercial cashmere flocks in Australia. Data was analysed using general linear model analysis. Nineteen parameters were recorded for 1168 goats. Following log transformation, the best model for FCSD included farm, goat age, mean fibre diameter, fibre curvature, fibre diameter standard deviation, cashmere yield, cashmere staple length and live weight and the interactions between these terms. The percentage variance accounted for was 82%. Mean fibre diameter and fibre curvature accounted for 55% of the variation in FCSD and farm accounted for 41% of the variation. Cumulatively mean fibre diameter, fibre curvature and farm accounted for 75% of the variation existing in FCSD. For the other terms, age added 2% and the remaining measurements a further 5% to variation accounted for by the best model. Environmental (farm-effects) on FCSD are large and may explain the difficulties cashmere growers experience when they evaluate cashmere goats. Increasing the fibre curvature of cashmere was associated with an increase in cashmere FCSD, but for some combinations of farm and MFD the increase in FCSD was approximate to 35 degrees/mm while with other combinations the increase was approximate to 5 degrees/mm as fibre curvature increased. At a given fibre curvature the response of FCSD to mean fibre diameter differed substantially between farms, from strong negative to strong positive. Increasing cashmere yield from 20 to 55% was associated with decline in FCSD. Increasing fibre diameter SD from 3 to 5 mu m increased FCSD by 6 degrees/mm, increasing staple length and live weight were associated with small declines in FCSD. There was strong evidence of an age effect that differed with farms, but there were few clear cut trends in FCSD with increasing age. The results suggest that farm based influences are affecting the point at which fibre keratinisation is completed and thus influencing the variation in FCSD. We conclude that, because the differences between farms in the relationship been fibre curvature standard deviation, mean fibre diameter and fibre curvature are great, it is unlikely that crimp rate and crimp definition will be good indicators of cashmere fineness across farms. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.