scholarly journals The Genetic Diversity of Trans-caucasian Native Sheep Breeds

2006 ◽  
Vol 19 (7) ◽  
pp. 943-952 ◽  
Author(s):  
Jibril Hirbo ◽  
Anne Muigai ◽  
A. N. Naqvi ◽  
E. D. Rege ◽  
Olivier Hanotte
Keyword(s):  
Genetic Diversity ◽  
Sheep Breeds ◽  
Native Sheep

scholarly journals PSX-18 High-density genomic description of Russian native sheep breed of the Republic of Tyva

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 453-454
Author(s):  
Tatiana Evgenievna Deniskova ◽  
Alexandra Abdelmanova ◽  
Arsen V Dotsev ◽  
Chechena Sambu-Khoo ◽  
Henry Reyer ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Size ◽  
Effective Population Size ◽  
High Density ◽  
Sheep Breed ◽  
Current Status ◽  
Effective Population ◽  
Sheep Breeds ◽  
Native Sheep ◽  
The Republic

Abstract Tuva breed is the oldest native sheep breed in Russia with more than 2000 year-history and comes in third place by population size among coarse wool sheep. Tuva sheep produce high-quality meat as well as coarse wool to make traditional clothing in the Republic of Tyva. In present study, we aimed to evaluate genetic diversity and to establish genetic links of the Tuva breed with the other Russian coarse wool sheep to understand the origin and current status of this valuable livestock species. Twenty samples of Tuva were genotyped using Ovine Infinium® HD SNP BeadChip (Illumina, CA, USA). SNP-data were processed in PLINKv1.9, R package ‘diveRsity’ and SneP software. High-density SNP-genotypes of 10 coarse wool sheep breeds were used as comparison groups. Observed heterozygosity (Ho) and allelic richness (Ar) in Tuva breed were 0.336 and 1.884, respectively, and were practically equal to mean values estimated across all analyzed sheep breeds (Ho=0.335, Ar=1.884). All coarse wool breeds showed moderate heterozygote excess which was the highest in Tuva breed (1.6%). Effective population sizes estimated for three and five generations ago for Tuva breed (Ne3 =118 and Ne5 =179) were less than those in other breeds (Ne3 = 314 and Ne5 = 441 for Edilbai or Ne3 = 300 and Ne5 = 450 for Kalmyk) but not the lowest (Ne3 = 49 and Ne5 = 72 for Buubei). Values of historical effective population size estimated for 60 generations ago for Tuva breed was 1457 that was compatible with those obtained for other breeds (Ne60 from 586 for Buubei to 2634 for Kalmyk). Despite the obvious decrease in effective population size, levels of genetic diversity are not critical that would allow to develop programs to ensure preservation and sustainable development of Tuva breed. The study was funded by RSF No. 19-16-00070.

scholarly journals Assessment of genetic diversity of Turkish and Algerian native sheep breeds

2020 ◽  
Vol 115 (1) ◽  
pp. 5
Author(s):  
Abdelkader AMEUR AMEUR ◽  
Onur YILMAZ ◽  
Nezih ATA ◽  
Ibrahim CEMAL ◽  
Semir Bechir Suheil GAOUAR
Keyword(s):  
Genetic Diversity ◽  
Production Systems ◽  
Productivity Loss ◽  
Genetic Management ◽  
Breeding Programs ◽  
Sheep Breeds ◽  
Genetic Clusters ◽  
Native Sheep ◽  
Sheep Production ◽  
High Level

In Algeria and Turkey, the sheep production systems are based on the under extensive rural conditions and their genetic management has led to increased homozygosity and hence productivity loss. The identification of inter-breed and intra-breed genetic diversity plays a key role in the shaping of conservation and breeding programs. The present study was conducted to investigate the genetic diversity of native sheep breeds reared in Turkey and Algeria. A total of 240 animals from four Algerian (Hamra, Ouled Djellal, Sidaou, and Tazegzawt) and four Turkish (White Karaman, South Karaman, Karacabey Merino, and Kıvırcık) native sheep breeds were genotyped with fourteen microsatellite markers recommended by FAO. A total of 340 alleles were detected from fourteen markers studied. All the eight breeds exhibited moderate to high levels of genetic diversity, with a slight superiority of the Algerian sheep breeds. Overall FIS value was low, but highly significant (p < 0.001). It may have been due to the high inbreeding within the population. The mean global coefficient of gene differentiation (GST) showed that approximately 94.0 % of the genetic variation was within-population. The highest number of private alleles with a frequency above 5 % was observed in Ouled Djellal sheep. Structure analysis of populations studied revealed the most appropriate K with four genetic clusters. As the result, the dendrogram showed that the Algerian sheep breeds were completely separated from the Turkish sheep breeds furthermore the Bayesian clustering revealed a high level of admixture, especially in Algerian sheep populations.

scholarly journals Genetic diversity and differentiation of 12 eastern Adriatic and western Dinaric native sheep breeds using microsatellites

animal ◽  
2014 ◽  
Vol 8 (2) ◽  
pp. 200-207 ◽  
Author(s):  
D. Salamon ◽  
B. Gutierrez-Gil ◽  
J.J. Arranz ◽  
J. Barreta ◽  
V. Batinic ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Sheep Breeds ◽  
Native Sheep

scholarly journals Assessment of genetic diversity of Turkish and Algerian native sheep breeds

2020 ◽  
Vol 115 (1) ◽  
pp. 5
Author(s):  
Abdelkader AMEUR AMEUR ◽  
Onur YILMAZ ◽  
Nezih ATA ◽  
Ibrahim CEMAL ◽  
Semir Bechir Suheil GAOUAR
Keyword(s):  
Genetic Diversity ◽  
Production Systems ◽  
Productivity Loss ◽  
Genetic Management ◽  
Breeding Programs ◽  
Sheep Breeds ◽  
Genetic Clusters ◽  
Native Sheep ◽  
Sheep Production ◽  
High Level

In Algeria and Turkey, the sheep production systems are based on the under extensive rural conditions and their genetic management has led to increased homozygosity and hence productivity loss. The identification of inter-breed and intra-breed genetic diversity plays a key role in the shaping of conservation and breeding programs. The present study was conducted to investigate the genetic diversity of native sheep breeds reared in Turkey and Algeria. A total of 240 animals from four Algerian (Hamra, Ouled Djellal, Sidaou, and Tazegzawt) and four Turkish (White Karaman, South Karaman, Karacabey Merino, and Kıvırcık) native sheep breeds were genotyped with fourteen microsatellite markers recommended by FAO. A total of 340 alleles were detected from fourteen markers studied. All the eight breeds exhibited moderate to high levels of genetic diversity, with a slight superiority of the Algerian sheep breeds. Overall FIS value was low, but highly significant (p < 0.001). It may have been due to the high inbreeding within the population. The mean global coefficient of gene differentiation (GST) showed that approximately 94.0 % of the genetic variation was within-population. The highest number of private alleles with a frequency above 5 % was observed in Ouled Djellal sheep. Structure analysis of populations studied revealed the most appropriate K with four genetic clusters. As the result, the dendrogram showed that the Algerian sheep breeds were completely separated from the Turkish sheep breeds furthermore the Bayesian clustering revealed a high level of admixture, especially in Algerian sheep populations.

Genetic diversity of three Chinese native sheep breeds

2017 ◽  
Vol 53 (1) ◽  
pp. 118-127 ◽  
Author(s):  
G. -X. E ◽  
Y. -Fu. Huang ◽  
Y. -Ju Zhao ◽  
J. -N. He
Keyword(s):  
Genetic Diversity ◽  
Sheep Breeds ◽  
Native Sheep

Assessing genetic diversity and differentiation in Portuguese coarse-wool sheep breeds with microsatellite markers

2008 ◽  
Vol 78 (1-3) ◽  
pp. 32-40 ◽  
Author(s):  
F. Santos-Silva ◽  
R.S. Ivo ◽  
M.C.O. Sousa ◽  
M.I. Carolino ◽  
C. Ginja ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Sheep Breeds

Genetic variation and distances of five Italian native sheep breeds

1990 ◽  
Vol 21 (1) ◽  
pp. 87-92 ◽  
Author(s):  
M. ZANOTTI CASATI ◽  
G. C. GANDINI ◽  
P. LEONE
Keyword(s):  
Genetic Variation ◽  
Sheep Breeds ◽  
Native Sheep
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