Yakubu Abdulmojeed, Salako Adebowale E, Imumorin Ikhide G
Department of Animal Science, Faculty of Agriculture, Nasarawa State University, Keffi, Shabu-Lafia Campus, P.M.B. 135, Lafia, Nigeria.
Trop Anim Health Prod. 2011 Mar;43(3):561-6. doi: 10.1007/s11250-010-9731-y. Epub 2010 Nov 16.
The population structure of 302 randomly selected West African Dwarf (WAD) and Red Sokoto (RS) goats was examined using multivariate morphometric analyses. This was to make the case for conservation, rational management and genetic improvement of these two most important Nigerian goat breeds. Fifteen morphometric measurements were made on each individual animal. RS goats were superior (P<0.05) to the WAD for the body size and skeletal proportions investigated. The phenotypic variability between the two breeds was revealed by their mutual responses in the principal components. While four principal components were extracted for WAD goats, three components were obtained for their RS counterparts with variation in the loading traits of each component for each breed. The Mahalanobis distance of 72.28 indicated a high degree of spatial racial separation in morphology between the genotypes. The Ward's option of the cluster analysis consolidated the morphometric distinctness of the two breeds. Application of selective breeding to genetic improvement would benefit from the detected phenotypic differentiation. Other implications for management and conservation of the goats are highlighted.
使用多变量形态计量分析检查了302只随机选择的西非矮山羊（WAD）和红索科托山羊（RS）的种群结构。目的是为这两个最重要的尼日利亚山羊品种的保护、合理管理和遗传改良提供依据。对每只动物进行了15项形态计量测量。在所研究的体型和骨骼比例方面，RS山羊优于WAD山羊（P<0.05）。两个品种之间的表型变异性通过它们在主成分中的相互反应得以揭示。WAD山羊提取了四个主成分，而RS山羊提取了三个主成分，每个品种各成分的载荷性状存在差异。马氏距离为72.28，表明基因型之间在形态上存在高度的空间种族分离。聚类分析的沃德法巩固了两个品种在形态计量上的差异。对遗传改良应用选择性育种将受益于检测到的表型分化。文中还强调了对山羊管理和保护的其他影响。
