THE INHERITANCE OF CASHMERE IN AUSTRALIAN GOATS .1. CHARACTERISTICS OF THE BASE-POPULATION AND THE EFFECTS OF ENVIRONMENTAL-FACTORS
THE INHERITANCE OF CASHMERE IN AUSTRALIAN GOATS .1. CHARACTERISTICS OF THE BASE-POPULATION AND THE EFFECTS OF ENVIRONMENTAL-FACTORS
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DOI：
10.1016/0301-6226(89)90046-8
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发表时间：
1989-02-01
期刊：
影响因子：
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通讯作者：
PATTIE, WA
中科院分区：
文献类型：
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作者：
RESTALL, BJ;PATTIE, WA
提供了 1150 只未经选择的野性雌性山羊在 4 年（1981-1983 年）内与 45 只未经选择的雄性山羊及其 1169 只后代交配的羊毛、活重和毛囊数据。雌成虫的体重、绒毛重量、绒毛直径、长度、初级和次级卵泡密度以及S/P比值分别为29.4kg、53g、15.4μm、51.4mm、2.37mm-2、14.62mm-2和6.17。成年雄性体重较重，绒毛产量较多，但毛囊密度较低。 动物间变异系数范围为 20% 至 65%，但羽绒直径除外，其系数小于 10%。怀孕使羽绒产量减少 30%，哺乳期使羽绒产量减少 48%，两者合计减少 65%。基础成虫的雌性后代的平均活重为24.7公斤，羽重为75.0克，羽径为15.5微米，羽长为62.2毫米，初级卵泡为3.42毫米-2，次级卵泡为23.4毫米-2，S/P比为6.81。雄性比雌性重 14%，而羽绒重量和长度略有增加，但并不显着。不同性别的下径没有差异。出生类型和年龄造成的差异在第一年最大。单胎动物平均比双胞胎重 6.3%，绒毛长得也多 6.6%，绒毛更长、更粗（分别为 16.3% 和 20.6%）。所有参数的年龄差异均显着；特别是，从第一绒毛到第二绒毛的羽绒直径增加了1.1μm，从第二绒毛到第三绒毛的绒毛直径增加了0.7μm，并且从第三绒毛到第四绒毛的绒毛直径增加了0.4μm。性别、出生类型和年龄组之间皮肤毛囊密度的差异反映了活体重的差异。
Fleece, liveweight and skin follicle data are presented for 1150 unselected feral female goats mated over a period of 4 years (1981-1983) to 45 unselected male goats, and 1169 of their offspring. Liveweight, down weight, down diameter, length, primary and secondary follicle density and S/P ratio of female adults were 29.4 kg, 53 g, 15.4 .mu.m, 51.4 mm, 2.37 mm-2, 14.62 mm-2 and 6.17, respectively. The adult males were heavier and had greater down production but follicle densities were lower. Between-animal coefficients of variation ranged from 20 to 65% with the exception of down diameter for which the coefficient was less than 10%. Pregnancy reduced down production by 30%, lactation reduced it by 48% and together they reduced it by 65%. Female progeny of the foundation adults averaged 24.7 kg liveweight, 75.0 g down, 15.5 .mu.m down diameter, 62.2 mm down length, 3.42 primary follicles mm-2, 23.4 secondary follicles mm-2 and 6.81 S/P ratio, respectively. Males were 14% heavier than females, while down weight and length were slightly, but not significantly, greater. There was no difference between the sexes in down diameter. Differences caused by birth type and age were greatest in their first year. Single-born animals averaged 6.3% heavier than twins and grew 6.6% more down which was longer and coarser (16.3 and 20.6%, respectively). Age differences were significant for all parameters; in particular down diameter increased by 1.1 .mu.m from first to second fleece, 0.7 .mu.m from second to third fleece, and 0.4 .mu.m from third to fourth fleece. Differences in skin-follicle densities between sex, birth type and age groups reflected differences in liveweight.