Sustainability in livestock farming requires monitoring of autochthonous breeds which are well adapted to the local environment. The morphometric measurements seem to be the first approach which can provide useful information on the suitability of animal genetic resources for selection. In this work, thirteen morphometric variables were used for the phenotypic characterization of 130 adult autochthones cattle randomly selected from 30 local farms in Guelma. There were cases from four commonly accepted and traditional ecotypes: Guelmois, Cheurfa, Sétifien and Fawn. The results showed several and significant positive correlations between the different variables. Correlations were analyzed using Varimax orthogonal rotation PCA and three factors were extracted, which explain more than 75% of the total variation in the four ecotypes. Stepwise discriminant analysis showed that 6 of the 13 variables had discriminatory power to define the phenotypic profile of the ecotypes. Canonical discriminant analysis indicated that the Sétifien ecotype is separate from the other three ecotypes. Mahalanobis distances were significant between the different ecotypes except for the distance between the Guelmois and Fawn ecotypes. The cross-validation procedure assigned 91.42% of the Sétifien animals to their genetic group, while the percentages of animals assigned to the Cheurfa, Guelmois and Fawn ecotypes were 80.00%, 65.71% and 53.33% respectively. The multivariate approach has proven to be effective in differentiating the four ecotypes, with clear morphological differences from the Sétifien ecotype that may benefit from a genetic improvement program for more sustainable genetic resources preservation.

中文翻译：

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使用多变量分析作为阿尔及利亚东北部主要本土牛生态型形态特征的工具。

畜牧业的可持续性需要对适应当地环境的本土品种进行监测。形态测量似乎是第一种可以提供关于动物遗传资源是否适合进行选择的有用信息的方法。在这项工作中，13 个形态测量变量用于从 Guelma 的 30 个当地农场中随机选择的 130 头成年本土牛的表型特征。有来自四种普遍接受的传统生态型的案例：Guelmois、Cheurfa、Sétifien 和 Fawn。结果表明，不同变量之间存在多个显着的正相关。使用 Varimax 正交旋转 PCA 分析相关性并提取三个因素，这解释了四种生态型总变异的 75% 以上。逐步判别分析表明，13 个变量中有 6 个具有定义生态型表型特征的判别力。典型判别分析表明 Sétifien 生态型与其他三种生态型是分开的。除了 Guelmois 和 Fawn 生态型之间的距离外，不同生态型之间的 Mahalanobis 距离是显着的。交叉验证程序将 91.42% 的 Sétifien 动物分配到其基因组，而分配给 Cheurfa、Guelmois 和 Fawn 生态型的动物百分比分别为 80.00%、65.71% 和 53.33%。多变量方法已被证明可有效区分四种生态型，