Origin, genetic diversity, and population structure of Chinese domestic sheep

Chen, Shanyuan; Duan, Ziyuan; Tao, Sha; Xiangyu, Jinggong; Wu, Shi-Fang; Zhang, Yaping

doi:10.1016/j.gene.2006.03.009

Cited by 88 publications

(96 citation statements)

References 20 publications

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“…Milchschaf breed in our study), and in accordance with a high gene flow between Asian and European sheep [11]. However, the most relevant result from Iberian exploration was the identification of two individuals showing haplotype C. The recently reported type C has proven more frequent in Anatolian sheep [13] than in other Asiatic breeds [5,8,20], and within Europe it has been found, so far, only in Portugal [14].…”

Section: Discussionsupporting

confidence: 86%

Mitochondrial diversity and the origin of Iberian sheep

et al. 2007

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-Mitochondrial DNA diversity was analysed in 19 Iberian and six foreign sheep breeds. Three mtDNA lineages (B, A and C) were found in the Iberian sheep, with type B clearly predominating over the others. The results were analysed for each of the morphologically determined breed groups in Iberian sheep: Merino, Entrefino, Churro and Iberian trunks. MtDNA lineage C was found only in the Iberian trunk composed of Montesina and Ojalada. These two populations had high mtDNA variability, and in the Iberian sheep only Merino Branco had more variation. The other three Merino types studied showed moderate variability, including the most authentic Merino, the Spanish Merino. These three Merinos clustered closely in a multidimensional scaling representation of distances, while the fourth breed (Merino Branco) showed a clear separation. As for the other two trunks, breeds from the Churro group showed greater maternal uniformity while results for populations included in the so-called Entrefino trunk seemed to have a more heterogeneous maternal origin. The results obtained are discussed with available data from nuclear markers and with morphological classifications, and all this information is analysed in relation to the origin of the different Iberian sheep breeds. mitochondrial DNA / local sheep / sheep origin

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Section: Discussionsupporting

confidence: 86%

Mitochondrial diversity and the origin of Iberian sheep

et al. 2007

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“…In previous studies, partial mtDNA sequences have been used to show the Urial and Argali are highly unlikely to be the progenitor of domestic sheep (Hiendleder et al, 1998(Hiendleder et al, , 2002Wu et al, 2003;Chen et al, 2006;Tapio et al, 2006;Meadows et al, 2007), however the relationship between wild and domestic sheep was revisited in this study for three reasons. First, the relationship between wild species remains unresolved, as a number of different phylogenies have been reported (Hiendleder et al, 2002;Bunch et al, 2006;Meadows et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Haplogroup relationships between domestic and wild sheep resolved using a mitogenome panel

2010

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“…To obtain a maximum value for the biomass of domesticated megafauna, I calculated the present proportion of human biomass to domestic stock biomass as tabulated by Hern (22). I then used that proportion to back-calculate the maximum biomass of domestic stock, given the estimated biomass of humans, going back to 10.5 kyr B.P., by which time pigs, goats, sheep, and cattle were first domesticated (31)(32)(33)(34)(35). For time slices up to 6 kyr B.P., only pigs, goats, and cattle were included in the domestic livestock count.…”

Section: Methodsmentioning

confidence: 99%

Megafauna biomass tradeoff as a driver of Quaternary and future extinctions

Barnosky

2008

Proc. Natl. Acad. Sci. U.S.A.

213

183

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Earth's most recent major extinction episode, the Quaternary Megafauna Extinction, claimed two-thirds of mammal genera and one-half of species that weighed >44 kg between Ϸ50,000 and 3,000 years ago. Estimates of megafauna biomass (including humans as a megafauna species) for before, during, and after the extinction episode suggest that growth of human biomass largely matched the loss of non-human megafauna biomass until Ϸ12,000 years ago. Then, total megafauna biomass crashed, because many non-human megafauna species suddenly disappeared, whereas human biomass continued to rise. After the crash, the global ecosystem gradually recovered into a new state where megafauna biomass was concentrated around one species, humans, instead of being distributed across many species. Precrash biomass levels were finally reached just before the Industrial Revolution began, then skyrocketed above the precrash baseline as humans augmented the energy available to the global ecosystem by mining fossil fuels. Implications include (i) an increase in human biomass (with attendant hunting and other impacts) intersected with climate change to cause the Quaternary Megafauna Extinction and an ecological threshold event, after which humans became dominant in the global ecosystem; (ii) with continued growth of human biomass and today's unprecedented global warming, only extraordinary and stepped-up conservation efforts will prevent a new round of extinctions in most body-size and taxonomic spectra; and (iii) a near-future biomass crash that will unfavorably impact humans and their domesticates and other species is unavoidable unless alternative energy sources are developed to replace dwindling supplies of fossil fuels.paleoecology ͉ pleistocene ͉ mammal ͉ ecological threshold

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Origin, genetic diversity, and population structure of Chinese domestic sheep

Cited by 88 publications

References 20 publications

Mitochondrial diversity and the origin of Iberian sheep

Mitochondrial diversity and the origin of Iberian sheep

Haplogroup relationships between domestic and wild sheep resolved using a mitogenome panel

Megafauna biomass tradeoff as a driver of Quaternary and future extinctions

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