Abstract Genetic parameters for South African Angora goats were estimated from body weight, mohair production and reproduction data collected from birth on ram and ewe kids, as well as on the adult ewes in three herds from 2000 to 2015. Medium heritabilities were estimated for body weight from birth until 12-month of age and adult body weight, while a high heritability was estimated for 16-month body weight. Heritability for fibre diameter and spinning fineness was high, while a low heritability was estimated for standard deviation of fibre diameter along the length of the staple and for staple length. Medium heritabilities were estimated for fleece weight and the remainder of the fibre traits. Low heritabilities were estimated for all reproductive traits. Heritability estimates of lifetime number of kids born and weaned were higher than the heritability estimated on the individual records. Expressing lifetime number of kids weaned per kidding opportunity further increased the heritability. There were favourable significant genetic correlations of total weight of kids weaned (TWW) with adult body weight and fibre diameter, but significant unfavourable genetic correlations of TWW with adult fleece weight. Fleece weight was, however, unfavourably correlated with fibre diameter. Early fleece weights were genetically favourably correlated with all the adult traits, except with adult fibre diameter. The opposite is true for early fibre diameter, which were genetically unfavourably correlated with all the adult traits, except with adult fibre diameter. Early body weights were also genetically favourably correlated with all the adult traits, except with adult fibre diameter. Maiden ewe reproductive performance at the first parity was favourable genetically correlated with lifetime reproductive performance. Different selection strategies are proposed for ram and ewe selection, where ewe selection should focus on improving reproduction, while the fleece traits should be accommodated under ram selection. Selection of young ewes should be based on early body weight and TWW at the first parity. Too much selection pressure on early fleece weight and fibre diameter should be avoided in the selection of young ewes.

中文翻译：

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南非安哥拉山羊繁殖、体重和马海毛产量的遗传分析

摘要 南非安哥拉山羊的遗传参数是根据 2000 年至 2015 年从公羊和母羊幼崽以及三群成年母羊出生时收集的体重、马海毛生产和繁殖数据估算的。体重的中等遗传力估算从出生到 12 个月大和成年体重，而估计 16 个月体重的高遗传力。纤维直径和纺丝细度的遗传力较高，而纤维直径沿短纤维长度的标准偏差和短纤维长度的遗传力估计较低。估计羊毛重量和其余纤维性状的中等遗传力。所有生殖性状都被估计为低遗传力。一生中出生和断奶的孩子数的遗传率估计高于个人记录中估计的遗传率。表达每个开玩笑机会断奶的孩子的终生数量进一步增加了遗传力。断奶仔猪总重（TWW）与成年体重和纤维直径之间存在显着的显着遗传相关性，而TWW与成年羊毛重呈显着不利的遗传相关性。然而，羊毛重量与纤维直径不利地相关。除了成年纤维直径外，早期羊毛重量与所有成年特征在遗传上有利相关。早期纤维直径正好相反，它与所有成体性状在遗传上不利相关，除了成体纤维直径。除了成年纤维直径外，早期体重也与所有成年特征在遗传上有利相关。初产母羊的繁殖性能与终生繁殖性能有良好的遗传相关性。针对公羊和母羊的选择提出了不同的选择策略，其中母羊选择应侧重于提高繁殖能力，而羊毛性状应在公羊选择下进行。年轻母羊的选择应基于早期体重和第一胎的 TWW。在选择幼母羊时，应避免对早期羊毛重量和纤维直径的选择压力过大。初产母羊的繁殖性能与终生繁殖性能有良好的遗传相关性。针对公羊和母羊的选择提出了不同的选择策略，其中母羊选择应侧重于提高繁殖能力，而羊毛性状应在公羊选择下适应。年轻母羊的选择应基于早期体重和第一胎的 TWW。在选择幼母羊时，应避免对早期羊毛重量和纤维直径的选择压力过大。初产母羊的繁殖性能与终生繁殖性能有良好的遗传相关性。针对公羊和母羊的选择提出了不同的选择策略，其中母羊选择应侧重于提高繁殖能力，而羊毛性状应在公羊选择下进行。年轻母羊的选择应基于早期体重和第一胎的 TWW。在选择幼母羊时，应避免对早期羊毛重量和纤维直径的选择压力过大。