Spatial variation in goat populations from Benin as revealed by multivariate analysis of morphological traits

Dossa, Luc Hippolyte; Wollny, C.B.A.; Gauly, Matthias

doi:10.1016/j.smallrumres.2007.01.003

Cited by 103 publications

(120 citation statements)

References 11 publications

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“…There is an increasing interest in the characterization of African small ruminant populations because of their major role in the maintenance of genetic resources as the basis of future improvement at both the production and the genetic levels (Dossa et al, 2007;Nsoso et al, 2004;Ouédraogo-Koné et al, 2006). Studies devoted to the morphological characterization of West African sheep are scarce and the average values obtained in this study for body measurements cannot be easily compared with others in the literature.…”

Section: Discussionmentioning

confidence: 89%

“…There are three main reasons explaining this introgression: (a) the action of the Peuls (Dossa et al, 2007), nomadic stockbreeders inhabiting the Sahelian area of Burkina Faso and other countries of West Africa, that also are active operators in the sheep market all over the countryside; (b) the increase of the duration of the dry seasons in the region since the 1980s, favouring the migration of the Sahelian sheep into the Sudan-Sahel and Sudan areas; and (c) the general interest of the Burkina Faso breeders in obtaining products with bigger conformation. Moreover, the introgression of the Sahelian sheep into the Sudan areas can be limited and mediated by the Sudan-Sahel population due to the fact that the Sahelian sheep is not trypanotolerant thus limiting its possibilities of use for reproduction in the southernmost Burkina Faso flocks.…”

Section: Discussionmentioning

confidence: 99%

“…Multifactorial analyses of morphological traits have been proved to be suitable in assessing the variation within a population and can discriminate different population types when all measured morphological variables are considered simultaneously. These kinds of studies are commonly reported in goats (Capote et al, 1998;Dossa et al, 2007;Herrera et al, 1996;Jordana et al, 1993;Zaitoun et al, 2005). However, multivariate analyses on morphological traits are rarely reported in sheep (Riva et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Multivariate characterization of morphological traits in Burkina Faso sheep

Traoré

Tamboura

Kaboré

et al. 2008

Small Ruminant Research

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a b s t r a c tA total of 6440 female sheep from Burkina Faso were scored for seven body measurements and four qualitative morphological traits. Sampling included the three main environmental areas and sheep breeds of Burkina Faso: the Sahel area (Burkina-Sahel sheep), the SudanSahel area (Mossi sheep) and the Sudan area (Djallonké sheep). Canonical analyses showed that differences in body measurements between the Sudan and the Sudan-Sahel sheep were small even though most body traits showed higher average values in the Burkina-Sahel sheep: the shortest Mahalanobis distance was found between the Sudan and the SudanSahel populations (1.54), whilst that between the Sudan and the Sahelian populations was the largest (7.88). Discriminant analysis showed that most Sudan (Djallonké) individuals (60.85%) were classified as Sudan-Sahel (Mossi) individuals whilst most Burkina-Sahel individuals were classified into their environmental area of sampling (89.46%). Correspondence analyses indicated that the Burkina-Sahel sheep population clustered together with dropping ears, black and brown colour patterns and presence of wattles, the Sudan sheep were closely associated with long hair and vertical and curled ears and that the Sudan-Sahel sheep did not have clear associations with qualitative phenotypic traits. At the morphological level, the Sudan-Sahel (Mossi) sheep population can be considered a geographical subpopulation belonging to the Djallonké breed, showing some particularities, namely larger body size, due to the particular environmental condition of the area in which it is managed and a continuous gene flow from Sahelian sheep, The information reported in this study will be the basis for the establishment of further characterization, conservation and selection strategies for Burkina Faso sheep.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multivariate characterization of morphological traits in Burkina Faso sheep

Traoré

Tamboura

Kaboré

et al. 2008

Small Ruminant Research

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“…In Nigeria, morphometric differentiation of indigenous small ruminant populations has been restricted to the use of analysis of variance (Fajemilehin & Salako, 2008). However, such type of analysis has limited power and multifactorial analyses of morphological traits are more appropriate to assess phenotypic variation within and between goat populations; and to appropriately discriminate different goat types because of the joint consideration of all measured morphological variables (Lanari et al, 2003;Zaitoun et al, 2005;Dossa et al, 2007;Traore et al, 2008). This becomes imperative because uncontrolled mating and geographical overlap are leading to the endangerment of breed purity and potentially important reservoir of caprine genetic resources is being put at risk.…”

Section: Introductionmentioning

confidence: 99%

Discriminant analysis of morphometric differentiation in the West African Dwarf and Red Sokoto goats

Yakubu¹,

Salako²,

Imumorin³

et al. 2011

SA J. An. Sci.

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This study evaluated the usefulness of morphological characteristics to distinguish two important indigenous goat breeds in Nigeria. Fifteen morphometric traits were measured on West African Dwarf -WAD (n = 160) and Red Sokoto -RS (n = 142) goats that ranged in age of up to 19 months and were reared extensively in villages in southern and northern Nigeria. Univariate analysis revealed that the body measures of RS goats were significantly higher than those of WAD goats. Canonical discriminant analysis gave better resolution, as only seven external morphological characteristics of strong discriminating power were extracted. The most discriminant variable between the two goat populations was rump height, followed in order by body length, horn length, face length, chest girth, neck circumference and head width. The discriminant function obtained correctly classified 100% of individuals from the sample of known goat populations. The classification accuracy of the function was cross-validated using the split-sample method, and indicated a 99.7% success rate (99.4% of WAD goats and 100% of RS goats were correctly assigned to their source genetic group). This study indicates that a discriminant tool may be used successfully in the field to separate WAD and RS goats. The present results could be complemented by molecular characterization using DNA markers for better management and conservation strategies of genetic resources for indigenous goats.

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“…There is an increasing interest in the characterisation of the African domestic small ruminant populations using morphological (Dossa et al, 2007;Traoré et al, 2008a,b), microsatellite (Álvarez et al, 2009, in press;Traoré et al, 2009;Peters et al, 2010) and mitochondrial (Royo et al, 2008) markers. The Bukina Faso goat population is mainly formed by three breeds (Traoré et al, 2008a: (a) the Northerner Sahelian breed is the Burkina Faso representative of the long-legged goat group, spread throughout the Sahel region of West Africa; (b) the Djallonké breed, located in the Southern Burkinabé Sudan area, is a short-eared and small-horned goat belonging to the West African Dwarf goat population; and (c) the Mossi breed, a transition population between the Sahel and the Djallonké goat breeds, which is kept in the Central Sudan-Sahel area of Burkina Faso.…”

Section: Introductionmentioning

confidence: 99%

Microsatellite analysis of the Rousse de Maradi (Red Sokoto) goat of Burkina Faso

Álvarez

Traoré

Kaboré

et al. 2012

Small Ruminant Research

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a b s t r a c tA total of 33 reproductive individuals of the Rousse de Maradi (Red Sokoto) goat breed of Burkina Faso were genotyped for 19 microsatellites and compared with 154 samples from four different populations of Burkinabé Sahelian and Djallonké goat. The betweenpopulations molecular coancestry for the Rousse de Maradi-pairs varied from 0.420 (with the Northern Sahelian population) to 0.459 (with the Eastern Djallonké population). The between-populations genetic differentiation assessed using F ST varied from 0.018 for the pair formed by the two Sahelian populations to 0.050 for the pairs formed between the Rousse de Maradi population and each of the Djallonké populations. Both correspondence and STRUCTURE analyses showed that the Rousse de Maradi breed: (a) has a particular genetic background; and (b) it is genetically nearer to the Sahelian goat. Overall, the present analysis characterise the Rousse de Maradi breed as a part the goat metapopulation exploited in the Sahel area rather than a population derived from the West African Dwarf goat. Implementation of strategies to further characterise production and reproduction performance of the Burkinabé Rousse de Maradi goat breed can be advised.

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Spatial variation in goat populations from Benin as revealed by multivariate analysis of morphological traits

Cited by 103 publications

References 11 publications

Multivariate characterization of morphological traits in Burkina Faso sheep

Multivariate characterization of morphological traits in Burkina Faso sheep

Discriminant analysis of morphometric differentiation in the West African Dwarf and Red Sokoto goats

Microsatellite analysis of the Rousse de Maradi (Red Sokoto) goat of Burkina Faso

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