Gudali Cattle of West and Central Africa

Tawah, C. L.; Rege, J.E.O.

doi:10.1017/s1014233900000651

Cited by 16 publications

(19 citation statements)

References 12 publications

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“…2000) constructs genetic clusters from a collection of individual multilocus genotypes, estimating for each individual the fractions of its genome that belong to each cluster. The absence of real distinct subclusters corresponding to predefined breeds within the zebu cluster is in direct agreement with the observed high levels of gene flow between the zebu breeds, their developmental histories (FDLPCS 1992; Tawah & Rege 1996a,b) and management practices (FDLPCS 1992). Traditional management practices for the breeds investigated are characterized by no defined breeding goals, no controlled mating, no improvement practices and no dams and sire evaluation.…”

Section: Discussionsupporting

confidence: 81%

Genetic structure and differentiation of 12 African Bos indicus and Bos taurus cattle breeds, inferred from protein and microsatellite polymorphisms

Ibeagha‐Awemu

Erhardt

2005

J Animal Breeding Genetics

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Level of genetic differentiation, gene flow and genetic structuring of nine Bos indicus and three Bos taurus cattle breeds in Cameroon and Nigeria were estimated using the genetic information from 16 microsatellite, five blood protein and seven milk protein markers. The global heterozygote deficit across all populations (Fit) amounted to 11.7% (p < 0.001). The overall significant (p < 0.001) deficit of heterozygotes because of inbreeding within breeds (Fis) amounted to 6.1%. The breeds were moderately differentiated (Fst = 6%, p < 0.001) with all loci except CSN1S2 contributing significantly to the Fst value. The 12 populations belong to two genetic clusters, a zebu and a taurine cluster. While inferred sub-clusters within the taurine group corresponded extremely well to predefined breed categorizations, no real sub-clusters, corresponding to predefined breeds, existed within the zebu cluster. With the application of prior population information, cluster analysis achieved posterior probabilities from 0.962 to 0.994 of correctly assigning individuals to their rightful populations. High gene flow was evident between the zebu populations. Positive and negative implications of the observed genetic structure of the breeds on their development, improvement and conservation are discussed. The study shows that the breeds are threatened by uncontrolled breeding and therefore are at risk to become genetically uniform in the future. This situation can be avoided by putting in place effective breeding and management measures aimed at limiting uncontrolled mating between the breeds and to preserve special characteristics, genetic as well as breed biodiversity. The first step towards realizing these goals might be to geographically demarcate the breeds.

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Section: Discussionsupporting

confidence: 81%

Genetic structure and differentiation of 12 African Bos indicus and Bos taurus cattle breeds, inferred from protein and microsatellite polymorphisms

Ibeagha‐Awemu

Erhardt

2005

J Animal Breeding Genetics

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“…The breeds are quite distinct phenotypically and one would have expected this to be reflected in the dendrogram and PC of relationships. Even though it is considered that the Gudalis are among the true shorthorn zebus of West Africa [42], an examination of the mY1 admixed coefficients gave this credit rather to the Nigerian Red Bororo. Adamawa Gudali was the zebu that diverged the most from the others.…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity, introgression and relationships among West/Central African cattle breeds

et al. 2004

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-Genetic diversity, introgression and relationships were studied in 521 individuals from 9 African Bos indicus and 3 Bos taurus cattle breeds in Cameroon and Nigeria using genotype information on 28 markers (16 microsatellite, 7 milk protein and 5 blood protein markers). The genotypes of 13 of the 16 microsatellite markers studied on three European (German Angus, German Simmental and German Yellow) and two Indian (Nelore and Ongole) breeds were used to assess the relationships between them and the African breeds. Diversity levels at microsatellite loci were higher in the zebu than in the taurine breeds and were generally similar for protein loci in the breeds in each group. Microsatellite allelic distribution displayed groups of alleles specific to the Indian zebu, African taurine and European taurine. The level of the Indian zebu genetic admixture proportions in the African zebus was higher than the African taurine and European taurine admixture proportions, and ranged from 58.1% to 74.0%. The African taurine breed, Muturu was free of Indian zebu genes while its counter Namchi was highly introgressed (30.2%). Phylogenic reconstruction and principal component analysis indicate close relationships among the zebu breeds in Cameroon and Nigeria and a large genetic divergence between the main cattle groups -African taurine, European taurine and Indian zebu, and a central position for the African zebus. The study presents the first comprehensive information on the hybrid composition of the individual cattle breeds of Cameroon and Nigeria and the genetic relationships existing among them and other breeds outside of Africa. Strong evidence supporting separate domestication events for the Bos species is also provided.

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“…Adamawa‐Gudali Shorthorned B. indicus , mainly bred in Cameroon and in Nigeria. Accurate estimates of the population are not available mainly because of its constant movement ( Tawah and Rege 1996). Coat is variable from white, grey, brown to black depending on breeding area.…”

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confidence: 99%

Genetic relationships among taurine (Bos taurus) and zebu (Bos indicus) populations as revealed by blood groups and blood proteins

Ceriotti

Caroli

Rizzi

et al. 2003

J Animal Breeding Genetics

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Summary Genetic relationships among nine cattle populations (Bos indicus and Bos taurus) were investigated using blood group antigenic factors and biochemical loci, for a total of 46 polymorphisms. All the analysed breeds live in hot climatesof Africa (Azaouak, Adamawa‐Gudali, Small East African Zebu, Surqo, Brown Atlas, N'Dama, Somba), Central America (Carora), and Italy (Modicana). The study was carried out on 891 unrelated animals. Average heterozygosity ranged between 0.25 and 0.31 and showed higher values in B. indicus (zebu) populations (Azaouak, Adamawa‐Gudali, Small East African Zebu, Surqo). Genetic distances between breeds were used for dendrogram construction. Two main clusters shared B. taurus and B. indicus. Within taurine (B. taurus) breeds, European or European like taurine populations (Modicana, Brown Atlas and Carora) clustered together, most probably because of the consistent presence of Brown Swiss genes in all of them. Another cluster involved the two African taurine populations (N'Dama and Somba). Multivariate analyses (Principal Component Analysis, Correspondence Analysis) of the allelic frequencies confirmed the breed clustering obtained. Overall relationships among breeds reflected remarkable genetic affinity between some of them.

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Gudali Cattle of West and Central Africa

Cited by 16 publications

References 12 publications

Genetic structure and differentiation of 12 African Bos indicus and Bos taurus cattle breeds, inferred from protein and microsatellite polymorphisms

Genetic structure and differentiation of 12 African Bos indicus and Bos taurus cattle breeds, inferred from protein and microsatellite polymorphisms

Genetic diversity, introgression and relationships among West/Central African cattle breeds

Genetic relationships among taurine (Bos taurus) and zebu (Bos indicus) populations as revealed by blood groups and blood proteins

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