Genetic characterization of local Sudanese sheep breeds using DNA markers

Gornas, Nahid; Weimann, Christina; Hussien, Abbasher; Erhardt, G.

doi:10.1016/j.smallrumres.2010.08.009

Cited by 27 publications

(37 citation statements)

References 20 publications

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“…The results of the present study are consistent with those observed by Gornas et al (2011) and Álvarez et al (2012), who also found low variability and H O in specialized sheep breeds. Therefore, the Pantaneiro breed may constitute an important reservoir of genetic diversity, and may be useful in breeding programs and genetic management of herds.…”

Section: Discussionsupporting

confidence: 94%

Genetic diversity of locally adapted sheep from Pantanal region of Mato Grosso do Sul

Crispim¹,

Grisolia²,

Seno³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. Sheep of the Pantaneiro breed and seven other breeds, raised in the State of Mato Grosso do Sul, Brazil, were genotyped using eight microsatellite loci. The aim of the present study was to determine the genetic variability, phylogenetic relationship, and patterns of gene introgression and miscegenation among the animals surveyed, to obtain information about the genetic structure of locally adapted sheep in Mato Grosso do Sul. A total of 195 animals were used for genetic analysis. The Pantaneiro breed had the largest average number of alleles/locus (9.25), and higher allelic richness (6.95), while the Dorper population had the lowest values for these parameters (4.88 and 3.86, respectively). Analysis of genetic distance values and genetic structure between populations made it possible to characterize these animals with regard to distinct genetic groups. Average expected heterozygosity ranged from 0.72 (Pantaneiro) to 0.55 (Dorper), while average observed heterozygosity ranged from 0.63 (White Dorper) to 0.54 (Dorper). On the basis of the statistical parameters evaluated, it 5459 ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 12 (4): 5458-5466 (2013) Genetic diversity in Pantaneiro sheep was possible to demonstrate that when compared to other populations, the Pantaneiro breed represented a reservoir of genetic diversity with rare and useful alleles for genetic improvement, emphasizing the importance of preserving the breed.

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Section: Discussionsupporting

confidence: 94%

Genetic diversity of locally adapted sheep from Pantanal region of Mato Grosso do Sul

Crispim¹,

Grisolia²,

Seno³

et al. 2013

Genet. Mol. Res.

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“…Except for SRCRSP 9 and ILSTS 28 loci, the OH was always lower than the EH. Similar results were found by Bozzi et al, (2009), Arora et al, (2010, Zhong et al (2010), and Gornas et al, (2011) in sheep populations of Sudan, India, China, and Italy, respectively.…”

Section: Discussionsupporting

confidence: 85%

Genetic characterization of Colombian indigenous sheep

Ocampo

Martínez

Rocha

et al. 2017

Rev Colomb Cienc Pecu

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Background: indigenous breeds are important for poor farmers because of their natural selection against harsh environments and adaptation to regional conditions. However, inbreeding of indigenous sheep populations has increased in Colombia due to indiscriminate cross-breeding with foreign animals and lack of reproductive controls, with subsequent loss in productivity, which poses a great risk for the conservation of valuable genes. Objective: to determine the genetic diversity in Colombian indigenous sheep by using a panel of 10 microsatellite molecular markers. Methods: blood samples from 362 individuals from 43 farms in 11 Colombian provinces were genotyped and analyzed for a panel of 10 microsatellite markers. Results: a total of 134 alleles were found (13.4 alleles/locus on average) with a range of observed and expected heterozygosity of 0.428 to 0.831 and 0.615 to 0.855, respectively, and 0.742 polymorphic information content (PIC). The average Wright F-statistics (F IS ) of the breeds was 0.107, suggesting moderate levels of inbreeding. Colombian sheep showed a low level of genetic differentiation among breeds (F ST = 0.054) and STRUCTURE analysis showed complex patterns of admixture in the breeds. Conclusion: overall, Colombian sheep have high genetic variability, which is very important for future conservation programs and genetic improvement.

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“…It is observed that in all cases Ho was less than He, except for the loci SRCRSP9 and ILSTS28 loci where it was higher. Similar results were found by Bozzi et al (2009), Zhong et al (2010, and Gornas et al (2011), in sheep populations of Italy, China, and Sudan, respectively.…”

Section: Genetic Diversity Of the General Populationsupporting

confidence: 85%