Genome-wide analysis reveals the ancient and recent admixture history of East African Shorthorn Zebu from Western Kenya
Open accessAbstract
The Kenyan East African zebu cattle are valuable and widely used genetic resources. Previous studies using microsatellite loci revealed the complex history of these populations with the presence of taurine and zebu genetic backgrounds. Here, we estimate at genome-wide level the genetic composition and population structure of the East African Shorthorn Zebu (EASZ) of western Kenya. A total of 548 EASZ from 20 sub-locations were genotyped using the Illumina BovineSNP50 v. 1 beadchip. STRUCTURE analysis reveals admixture with Asian zebu, African and European taurine cattle. The EASZ were separated into three categories: substantial (⩾12.5%), moderate (1.56%<X<12.5%) and non-introgressed (⩽1.56%) according to the European taurine genetic proportion. The non-European taurine introgressed animals (n=425) show an unfluctuating zebu and taurine ancestry of 0.84±0.009 s.d. and 0.16±0.009 s.d., respectively, with significant differences in African taurine (AT) and Asian zebu backgrounds across chromosomes (P<0.0001). In contrast, no such differences are observed for the European taurine ancestry (P=0.1357). Excluding European introgressed animals, low and nonsignificant genetic differentiation and isolation by distance are observed among sub-locations (Fst=0.0033, P=0.09; r=0.155, P=0.07). Following a short population expansion, a major reduction in effective population size (Ne) is observed from approximately 240 years ago to present time. Our results support ancient zebu × AT admixture in the EASZ population, subsequently shaped by selection and/or genetic drift, followed by a more recent exotic European cattle introgression.
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K=2 highlights best the ancient divergence between indicine and taurine cattle.
“Consistent with the previous findings and the origins of the genetic backgrounds of the cattle breeds worldwide (Mbole-Kariuki et al., 2014; Bahbahani et al., 2018), K = 2 highlights best the ancient divergence between indicine and taurine cattle.”
From Identification of Candidate Signature Genes and Key Regulators Associated With Trypanotolerance in the Sheko Breed (2019) · cites this paper as Mbole-Kariuki et al., 2014
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- Authors
- Mbole-Kariuki, M. N., Sonstegard, T., Orth, A., Thumbi, S. M., Bronsvoort, B. M. D. C., Kiara, H., Toye, P., Conradie, I., Jennings, A., Coetzer, K., Woolhouse, M. E. J., Hanotte, O., & Tapio, M.
- Affiliations
- University of Nottingham (GB)
- Agricultural Research Service (US)
- International Livestock Research Institute (KE)
- Centre for Immunity, Infection and Evolution (GB)
- University of Pretoria (ZA)
- Roslin Institute (GB)
- Agrifood Research Finland (FI)
- Corresponding author
- Mbole-Kariuki, M N
- Hanotte, O
- Venue
- Heredity
- Published
- 2014-04-16
- Volume
- 113
- Issue
- 4
- Pages
- 297-305
- ISSN
- 0018-067X (ISSN-L)
- 1365-2540
- PMC
- PMC4181064
- OpenAlex
- W2154804764
- Cited by
- 69
- References
- 72
- Citations by year
- 2026: 3 · 2025: 8 · 2024: 5 · 2023: 3 · 2022: 3 · 2021: 5 · 2020: 7 · 2019: 5 · 2018: 5 · 2017: 9 · 2016: 3 · 2015: 7 · 2014: 4 · 2013: 1
- FWCI
- 5.04
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Heredity (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Jukuri (Natural Resources Institute Finland (Luke)) (submittedVersion)
- Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by)
- CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research) (submittedVersion, cc-by)
- UpSpace Institutional Repository (University of Pretoria) (submittedVersion, other-oa)
- Funders
- U.S. Department of Agriculture
- Wellcome Trust (07995, 31000, 095831)
- Agricultural Research Service (1265-31000-104-00D)
- Biotechnology and Biological Sciences Research Council (BBS/E/D/20211554, BBS/E/D/05191133, BBS/E/D/20211550)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and phenotypic traits in livestock
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Livestock Farming and Management
- Keywords
- population structure, effective population size, population growth, isolation by distance, genetic differentiation, cattle genetic resources, Western Kenya
- MeSH terms
- Animals, Cattle, Genotype, Kenya, Male, Genome, Microsatellite Repeats, Evolution, Molecular
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