Mitochondrial analysis sheds light on the origin of hair sheep

Álvarez, Isabel; Capote, J.; Traoré, Amadou; Fonseca, Norge; Pérez, Kirenia; Cuervo, M.; Fernández, I.; Goyache, F.

doi:10.1111/j.1365-2052.2012.02398.x

Cited by 18 publications

(12 citation statements)

References 14 publications

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“…In consequence, we attribute the high genetic differentiation of the Canaria de Pelo sheep to the fact that it has an African rather than Iberian origin. Geographic isolation, until the discovery of the Canarian archipelago by the Spanish in the 15 th century, combined with the occurrence of population bottlenecks may have also contributed to enhance genetic divergence1415.…”

Section: Resultsmentioning

confidence: 99%

Population structure of eleven Spanish ovine breeds and detection of selective sweeps with BayeScan and hapFLK

Manunza

Cardoso

Noce

et al. 2016

Sci Rep

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The goals of the current work were to analyse the population structure of 11 Spanish ovine breeds and to detect genomic regions that may have been targeted by selection. A total of 141 individuals were genotyped with the Infinium 50 K Ovine SNP BeadChip (Illumina). We combined this dataset with Spanish ovine data previously reported by the International Sheep Genomics Consortium (N = 229). Multidimensional scaling and Admixture analyses revealed that Canaria de Pelo and, to a lesser extent, Roja Mallorquina, Latxa and Churra are clearly differentiated populations, while the remaining seven breeds (Ojalada, Castellana, Gallega, Xisqueta, Ripollesa, Rasa Aragonesa and Segureña) share a similar genetic background. Performance of a genome scan with BayeScan and hapFLK allowed us identifying three genomic regions that are consistently detected with both methods i.e. Oar3 (150–154 Mb), Oar6 (4–49 Mb) and Oar13 (68–74 Mb). Neighbor-joining trees based on polymorphisms mapping to these three selective sweeps did not show a clustering of breeds according to their predominant productive specialization (except the local tree based on Oar13 SNPs). Such cryptic signatures of selection have been also found in the bovine genome, posing a considerable challenge to understand the biological consequences of artificial selection.

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Section: Resultsmentioning

confidence: 99%

Population structure of eleven Spanish ovine breeds and detection of selective sweeps with BayeScan and hapFLK

Manunza

Cardoso

Noce

et al. 2016

Sci Rep

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“…Previous investigation using mitochondrial and microsatellite markers were unable to specify a single source for the origin of hair sheep in the region[43,44]. Most agree the major influence on Caribbean hair sheep is Iberian, but fail to account for introgression of West African traits[45, 46].…”

Section: Discussionmentioning

confidence: 99%

“…Their lack of wool eliminates the cost of shearing and obviates the need for practices such as mulesing or docking to prevent health risks particular to fleeced sheep. Heat tolerance facilitated by the characteristics of a hair coat allows these breeds to thrive in tropical, arid, and semi-arid regions[3]. High temperatures and humidity areenvironmental conditions ideal for internal parasites such as Haemonchus contortus .…”

Section: Introductionmentioning

confidence: 99%

“…Prior to this report no genetic studies were able to identify a unique geographical origin of hair sheep in the New World. European, African, and Caribbean hair sheep share a common mitochondrial lineage[3], but different Y-chromosomal, and autosomal backgrounds[8]. This is logical considering the history of migration in the Old World and the colonization of the New.…”

Section: Introductionmentioning

confidence: 99%

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Whole genome structural analysis of Caribbean hair sheep reveals quantitative link to West African ancestry

et al. 2017

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Hair sheep of Caribbean origin have become an important part of the U.S. sheep industry. Their lack of wool eliminates a number of health concerns and drastically reduces the cost of production. More importantly, Caribbean hair sheep demonstrate robust production performance even in the presence of drug-resistant gastrointestinal nematodes, a rising concern to the industry. Despite the growing importance of hair sheep in the Americas their genetic origins have remained speculative. Prior to this report no genetic studies were able to identify a unique geographical origin of hair sheep in the New World. Our study clarifies the African and European ancestry of Caribbean hair sheep. Whole-genome structural analysis was conducted on four established breeds of hair sheep from the Caribbean region. Using breeds representing Africa and Europe we establish an objective measure indicating Caribbean hair sheep are derived from Iberian and West African origins. Caribbean hair sheep result from West African introgression into established ecotypes of Iberian descent. Genotypes from 47,750 autosomal single nucleotide polymorphism markers scored in 290 animals were used to characterize the population structure of the St. Croix, Barbados Blackbelly, Morada Nova, and Santa Ines. Principal components, admixture, and phylogenetic analyses results correlate with historical patterns of colonization and trade. These patterns support co-migration of these sheep with humans.

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“…Creole sheep in Latin America are derived from the introduction of Iberian sheep breeds during European colonization [1][2][3][4]. Normally, the term Creole (Criollo in Spanish) is used in animals and humans to refer to the descendant of an Iberian ancestor in the Americas.…”

Section: Introductionmentioning

confidence: 99%

Mitochondrial DNA Variations in Colombian Creole Sheep Confirm an Iberian Origin and Shed Light on the Dynamics of Introduction Events of African Genotypes

Revelo

López-Álvarez

Landi

et al. 2020

Animals

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The genetic origins and diversity of Creole sheep from five regions of Colombia were investigated based on mitochondrial DNA (mtDNA) variations across 89 sequences from five breeds: one wool Creole sheep (CL) and four hair Creole sheep, including Ethiopian (OPCE), Sudan (OPCS), Pelibuey (OPCP) and Wayúu (OPCW). A global comparison was done using 62 haplotypes from Iberian, African, Indian, Caribbean, Mexican, Caucasian and European sheep based on sequences retrieved from GenBank. This study aimed to identify the maternal origin of Colombian Creole sheep and their genetic relationships at a global level. The results showed 31 different haplotypes from Colombian Creole sheep, which can be assigned to maternal lineage B, the most common lineage found in European sheep breeds and the only one found in several Iberian breed (e.g., Churra, Spanish Merino) that most likely participated in the Creole formation. Additional analyses showed that wool and hair sheep retained a broad genetic identity despite being geographically separated. The global-level phylogenetic analysis revealed that Colombian Creole sheep belong to a distinct and defined genetic lineage that is likely the result of a founder effect with ecotypes of Iberian descent and the subsequent introduction of foreign breeds. This is consistent with historical reports on the presence of sheep in South America and, particularly, Colombia.

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Mitochondrial analysis sheds light on the origin of hair sheep

Cited by 18 publications

References 14 publications

Population structure of eleven Spanish ovine breeds and detection of selective sweeps with BayeScan and hapFLK

Population structure of eleven Spanish ovine breeds and detection of selective sweeps with BayeScan and hapFLK

Whole genome structural analysis of Caribbean hair sheep reveals quantitative link to West African ancestry

Mitochondrial DNA Variations in Colombian Creole Sheep Confirm an Iberian Origin and Shed Light on the Dynamics of Introduction Events of African Genotypes

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