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Arch. Anim. Breed., 60, 399-408, 2017
https://doi.org/10.5194/aab-60-399-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Original study
14 Nov 2017
Short tandem repeat (STR) based genetic diversity and relationship of indigenous Niger cattle
Moustapha Grema1,2, Amadou Traoré3,5, Moumouni Issa1, Marichatou Hamani1, Maaouia Abdou1, Albert Soudré4, Moumouni Sanou3,5, Rudolf Pichler5, Hamidou H. Tamboura3, Yenikoye Alhassane1, and Kathiravan Periasamy5 1Faculté des sciences et techniques, Abdou Moumouni University, BP 10960, Niamey, Niger
2Faculté des Sciences Agronomiques, Diffa University, BP 78, Diffa, Niger
3Institut de l'Environnement et de Recherches Agricoles (INERA), Laboratoire de Biologie et santés animales, 04 BP 8645, Ouagadougou 04, Burkina Faso
4Ecole Normale Supérieure, University of Koudougou, BP 376, Koudougou, Burkina Faso
5Animal Production and Health Laboratory, Joint FAO/IAEA Division, International Atomic Energy Agency, Vienna, Austria
Abstract. The diversity of cattle in Niger is predominantly represented by three indigenous breeds: Zebu Arabe, Zebu Bororo and Kuri. This study aimed at characterizing the genetic diversity and relationship of Niger cattle breeds using short tandem repeat (STR) marker variations. A total of 105 cattle from all three breeds were genotyped at 27 STR loci. High levels of allelic and gene diversity were observed with an overall mean of 8.7 and 0.724 respectively. The mean inbreeding estimate within breeds was found to be moderate with 0.024, 0.043 and 0.044 in Zebu Arabe, Zebu Bororo and Kuri cattle respectively. The global F statistics showed low genetic differentiation among Niger cattle with about 2.6 % of total variation being attributed to between-breed differences. Neighbor-joining tree derived from pairwise allele sharing distance revealed Zebu Arabe and Kuri clustering together while Zebu Bororo appeared to be relatively distinct from the other two breeds. High levels of admixture were evident from the distribution of pairwise inter-individual allele sharing distances that showed individuals across populations being more related than individuals within populations. Individuals were assigned to their respective source populations based on STR genotypes, and the percent correct assignment of Zebu Bororo (87.5 to 93.8 %) was consistently higher than Zebu Arabe (59.3 to 70.4 %) and Kuri (80.0 to 83.3 %) cattle. The qualitative and quantitative tests for mutation drift equilibrium revealed absence of genetic bottleneck events in Niger cattle in the recent past. High genetic diversity and poor genetic structure among indigenous cattle breeds of Niger might be due to historic zebu–taurine admixture and ongoing breeding practices in the region. The results of the present study are expected to help in formulating effective strategies for conservation and genetic improvement of indigenous Niger cattle breeds.

Citation: Grema, M., Traoré, A., Issa, M., Hamani, M., Abdou, M., Soudré, A., Sanou, M., Pichler, R., Tamboura, H. H., Alhassane, Y., and Periasamy, K.: Short tandem repeat (STR) based genetic diversity and relationship of indigenous Niger cattle, Arch. Anim. Breed., 60, 399-408, https://doi.org/10.5194/aab-60-399-2017, 2017.
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Short summary
The present study aimed at characterizing genetic diversity and relationship of 3 Niger cattle breeds (Zebu Arabe, Zebu Bororo and Kuri). High levels of allelic and gene diversity were observed while genetic differentiation was low. High genetic diversity and poor genetic structure might be due to historic zebu–taurine admixture and ongoing breeding practices in the region. The result of this study will help formulate effective strategies for conservation and improvement of Niger cattle breeds.
The present study aimed at characterizing genetic diversity and relationship of 3 Niger cattle...
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