Caractéristiques phénotypiques de la chèvre du sahel au Niger par analyse des indices de primarité et des paramètres qualitatifs

Abstract

In Niger, there are three goat breeds including two main ones: the Maradi red goat (17.5%) which has been the subject of numerous investigations and the Sahel goat (80%) which is little studied or unknown. Thus, to establish the phenotypic characteristics of the Sahel goat breed in Niger, investigations into qualitative parameters (appendices and pigmentation) by direct observation of animals were conducted in the northwestern part of the country (Tillabery, Tahoua and Niamey regions). Based on the voluntary participation of farmers, 443 goats (77% female, 39% with 4 pairs of permanent incisors and therefore considered adult) in 145 farms and 60 sites (7,38 ± 6,87 animals/site) were characterized. Analysis of primarity indices and multivariate analysis (ACM) emphasizes that there is no significant difference (P < 0.05) between sexes for all quality parameters except the carrying of a beard (male 55%, female 41%). The parameters distribution is significantly different between regions except the type of horn (mostly ibex in all regions). Indeed, ears are mostly drooping in Tillabéry, stalked in Tahoua and Niamey and pigmentation is dominated by black eumélanique in Tahoua, chocolate eumélanique in Niamey and phaeomélanique in Tillabéry. Goats of the three regions are significantly different based on phenotypic qualitative parameters. But, generally, the goat study population has the characteristics of a primary population which offers great opportunities for genetic improvement.