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RISS 인기검색어
- 검색키워드
- 저자 : Getinet Mekuriaw Tarekegn (검색결과 2 건)
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Tarekegn, Getinet Mekuriaw,Ji, Xiao-yang,Bai, Xue,Liu, Bin,Zhang, Wenguang,Birungi, Josephine,Djikeng, Appolinaire,Tesfaye, Kassahun Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.9
Objective: This study was carried out to assess the haplotype diversity and population dynamics in cattle populations of Ethiopia. Methods: We sequenced the complete mitochondrial cytochrome b gene of 76 animals from five indigenous and one Holstein Friesian${\times}$Barka cross bred cattle populations. Results: In the sequence analysis, 18 haplotypes were generated from 18 segregating sites and the average haplotype and nucleotide diversities were $0.7540{\pm}0.043$ and $0.0010{\pm}0.000$, respectively. The population differentiation analysis shows a weak population structure (4.55%) among the populations studied. Majority of the variation (95.45%) is observed by within populations. The overall average pair-wise distance ($F_{ST}$) was 0.049539 with the highest ($F_{ST}=0.1245$) and the lowest ($F_{ST}=0.011$) $F_{ST}$ distances observed between Boran and Abigar, and Sheko and Abigar from the indigenous cattle, respectively. The phylogenetic network analysis revealed that all the haplotypes detected clustered together with the Bos taurus cattle and converged to a haplogroup. No haplotype in Ethiopian cattle was observed clustered with the reference Bos indicus group. The mismatch distribution analysis indicates a single population expansion event among the cattle populations. Conclusion: Overall, high haplotype variability was observed among Ethiopian cattle populations and they share a common ancestor with Bos taurus.
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Agraw Amane,Gurja Belay,Yao Nasser,Martina Kyalo,Tadelle Dessie,Adebabay Kebede,Tesfaye Getachew,Jean‑Baka Domelevo Entfellner,Zewdu Edea,Olivier Hanotte,Getinet Mekuriaw Tarekegn 한국유전학회 2020 Genes & Genomics Vol.42 No.10
Background Ethiopian sheep living in diferent climatic zones and having contrasting morphologies are a most promising subject of molecular-genetic research. Elucidating their genetic diversity and genetic structure is critical for designing appropriate breeding and conservation strategies. Objective The study was aimed to investigate genome-wide genetic diversity and population structure of eight Ethiopian sheep populations. Methods A total of 115 blood samples were collected from four Ethiopian sheep populations that include Washera, Farta and Wollo (short fat-tailed) and Horro (long fat-tailed). DNA was extracted using Quick-DNA™ Miniprep plus kit. All DNA samples were genotyped using Ovine 50 K SNP BeadChip. To infer genetic relationships of Ethiopian sheep at national, continental and global levels, genotype data on four Ethiopian sheep (Adilo, Arsi-Bale, Menz and Black Head Somali) and sheep from east, north, and south Africa, Middle East and Asia were included in the study as reference. Results Mean genetic diversity of Ethiopian sheep populations ranged from 0.352±0.14 for Horro to 0.379±0.14 for ArsiBale sheep. Population structure and principal component analyses of the eight Ethiopian indigenous sheep revealed four distinct genetic cluster groups according to their tail phenotype and geographical distribution. The short fat-tailed sheep did not represent one genetic cluster group. Ethiopian fat-rump sheep share a common genetic background with the Kenyan fat-tailed sheep. Conclusion The results of the present study revealed the principal component and population structure follows a clear pattern of tail morphology and phylogeography. There is clear signature of admixture among the study Ethiopian sheep populations
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