THE EFFECTS OF BREED, CROSSBREEDING AND OTHER FACTORS ON VARIATION IN FLEECE AND SKIN TRAITS
THE EFFECTS OF BREED, CROSSBREEDING AND OTHER FACTORS ON VARIATION IN FLEECE AND SKIN TRAITS
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品种、杂交和其他因素对羊毛和皮肤性状变异的影响
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
G. Wiener
中科院分区：
文献类型：
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作者：
J. Woolliams;G. Wiener
品种和杂交对12周龄羔羊羊毛、毛囊密度和纤维直径性状的变异有显著影响。涉及的品种有苏格兰黑脸、南方国家切维奥特、威尔士山、林肯长羊毛、南唐和塔斯马尼亚美利奴，但最后一个品种只有公羊。在影响密度和直径性状方面，南伏与美利奴最接近，尽管美利奴杂交的毛囊密度高，但仍可明显区分。林肯和黑脸杂交以其长纤维而闻名，黑脸杂交也有最不密集的毛囊和最粗糙的原始纤维。最粗糙的次级纤维来自林肯和切维奥杂交。获得了黑脸、切维奥、威尔士和林肯品种杂交的杂种优势估计。杂种优势在广泛的性状中存在，但在所有杂交中并不明显。母系差异在许多性状上都很明显，但在密度上，这些差异明显与母系对羔羊活重的影响有关。羔羊的性别、出生类型、饲养方式和12周活重对许多性状有显著影响。在品种和杂交中，纤维密度和平均纤维直径之间存在很强的关系。这一关系表明，单位皮肤总纤维面积的品种变异小于其成分的品种变异。单位面积羊毛重与平均纤维长度关系最为密切。
Breed and crossbreeding significantly affected variation in 10 fleece, follicle density and fibre diameter traits in 12-week-old lambs. The breeds involved were the Scottish Blackface, South Country Cheviot, Welsh Mountain, Lincoln Longwool, Southdown and Tasmanian Merino, but the last only by rams. The Southdown came closest to the Merino in affecting density and diameter traits although the Merino crosses remained clearly distinguishable by their high follicle density. The Lincoln and Blackface crosses were notable for their long fibres and the Blackface crosses also had the least dense follicle and coarsest primary fibres. The coarsest secondary fibres were from Lincoln and Cheviot crosses. Heterosis estimates were obtained for crosses involving the Blackface, Cheviot, Welsh and Lincoln breeds. Significant heterosis was present in a wide range of traits but was not apparent in all crosses. Maternal differences were evident for many of the traits but with density these differences were apparently related to maternal effects on live weight of the lamb. The sex of the lamb, its birth type and rearing and its 12-week live weight significantly affected many of the traits. Among breeds and crosses a strong relationship was found between fibre density and average fibre diameter. The relationship suggested that breed variation in total fibre area per unit area of skin was small compared with the breed variation in its components. Fleece weight per unit area was most closely related to mean fibre length.