Genetic relationship amongst the major non‐coding regions of mitochondrial DNAs in wild boars and several breeds of domesticated pigs

Okumura, Naohiko; Kurosawa, Yaetsu; Kobayashi, Eiji; Watanobe, Takuma; Ishiguro, Naotaka; Yasue, Hiroshi; Mitsuhashi, T.

doi:10.1046/j.1365-2052.2001.00757.x

Cited by 83 publications

(68 citation statements)

References 17 publications

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“…The prevalence of cytB and D-loop European and Asian haplotypes had been previously studied in major European commercial breeds such as the Large White, Landrace, Duroc, Hampshire and others [2,7,10]. These studies demonstrate that most of these standard breeds had been extensively introgressed with Asian alleles.…”

Section: Resultsmentioning

confidence: 69%

“…Phylogenetic analysis of the porcine mitochondrial genome has revealed that Wild Boar subspecies were independently and simultaneously domesticated in Asia and Europe 9000 YBP [2,[6][7][8]10]. Major European and Asian mtDNA clades diverged well before this domestication event and the estimates for the time of divergence range from 58 000 to 900 000 YBP [1,2,6,7,10].…”

Section: Introductionmentioning

confidence: 99%

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Estimating the frequency of Asian cytochrome B haplotypes in standard European and local Spanish pig breeds

et al. 2004

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-Mitochondrial DNA has been widely used to perform phylogenetic studies in different animal species. In pigs, genetic variability at the cytochrome B gene and the D-loop region has been used as a tool to dissect the genetic relationships between different breeds and populations. In this work, we analysed four SNP at the cytochrome B gene to infer the Asian (A1 and A2 haplotypes) or European (E1 and E2 haplotypes) origins of several European standard and local pig breeds. We found a mixture of Asian and European haplotypes in the Canarian Black pig (E1, A1 and A2), German Piétrain (E1, A1 and A2), Belgian Piétrain (E1, A1), Large White (E1 and A1) and Landrace (E1 and A1) breeds. In contrast, the Iberian (Guadyerbas, Ervideira, Caldeira, Campanario, Puebla and Torbiscal strains) and the Majorcan Black pig breeds only displayed the E1 haplotype. Our results show that the introgression of Chinese pig breeds affected most of the major European standard breeds, which harbour Asian haplotypes at diverse frequencies (15−56%). In contrast, isolated local Spanish breeds, such as the Iberian and Majorcan Black pig, only display European cytochrome B haplotypes, a feature * Corresponding author: Armand.Sanchez@uab.es 98 A. Clop et al. that evidences that they were not crossed with other Chinese or European commercial populations. These findings illustrate how geographical confinement spared several local Spanish breeds from the extensive introgression event that took place during the 18th and 19th centuries in Europe. mitochondria / cytochrome B / pig breeds / Asian and European haplotypes / introgression

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Section: Resultsmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Estimating the frequency of Asian cytochrome B haplotypes in standard European and local Spanish pig breeds

et al. 2004

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“…On the other hand, the Large White present in line B, which is a hyperprolific breed with a higher content of fat in the carcass, may also have influenced this characteristic of line B. According to Watanabe et al (1986), Giuffra et al (2000) and Okumura et al (2001), the Large White breed was influenced by Chinese breeds at the end of the 18th century. Besides, molecular biology studies in Large White breed clearly show an introgression of Asian breeds into European breeds, by the high proportion of mitochondrial DNA originating from Asia.…”

Section: Discussionmentioning

confidence: 99%

Influence of Chinese breeds on pork quality of commercial pig lines

Cesar¹,

Silveira²,

Freitas³

et al. 2010

Genet. Mol. Res.

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ABSTRACT. We compared carcass and meat quality of pigs from the same sire line and two different dam lines, one that included Chinese breeds and one that did not. Line A consisted of 1/4 Landrace, 1/2 Large White, 1/8 Chinese breeds (Meishan, Fengjing, Jiaxing), and 1/8 Large White, Duroc and Pietrain, and line B consisted of 1/2 Large White and 1/2 Pietrain. The animals (N = 144) were slaughtered at a live weight of 108 kg. Backfat thickness, percentage of lean meat, pH 24 h after slaughter, meat color, percentage of drip loss, and percentage of intramuscular fat were measured and compared using analysis of variance in a completely randomized design; the BioEstat 5.0 test was applied for the comparison of means at a significance level of 5% for all analyses. Backfat was significantly lower for line A (12.78 mm) than for line B (15.90 mm). The pH measured 24 h after slaughter was significantly lower in line A (5.68) compared to line B (5.84). Percent lean meat was significantly higher for line A (61.21%) compared to line B (59.72%). Percentage drip loss was significantly higher in line A (2.73%) than in line B (2.23%). Percentage intramuscular fat and meat color were not significantly different between the lines. The inclusion of Chinese breeds produced a higher percentage of lean meat and reduced fat thickness, along with increased heterosis, which are important characteristics for breeding programs.

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“…Haplotypes of the 574-bp mtDNA were used in neighbor-joining analysis [12], which was performed using the PHYLIP program package, version 3.572 [3]. Sixty-three previously reported haplotypes (accession nos: D42170-D42174, D42178-D42185, AB015087-AB015086, AB041465-AB041473, AB041474-AB041476, AB041479-AB041485, AB041487-AB041493, AB041495-AB041499, AB053623-AB053627, D42176, AB071706, AB071707 and AB055222) [6,10,11,14,15] were used as reference sequences in NJ analysis.…”

mentioning

confidence: 99%

Genetic Profile and Serosurvey for Virus Infections of Japanese Wild Boars in Shikoku Island

Ishiguro

Nishimura

2005

J. Vet. Med. Sci.

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ABSTRACT. To estimate the genetic background of Japanese wild boars inhibiting the 4 prefectures of Shikoku Island (Kagawa, Tokushima, Kouchi and Ehime), we examined haplotypes of mitochondrial DNA (mtDNA) and genotypes of the nuclear glucosephosphate isomerase-processed pseudogene (GPIP) in 189 wild boars. Of the 8 different mtDNA haplotypes (J5, J10, J12, J13, J15, J19, J20 and E33) detected in Shikoku Island, the first to be identified were J19 and J20 (of Japanese wild boar lineage) and E33 (of European domestic pig lineage). The presence of haplotype E33 indicates local crossbreeding between wild boar and escaped domestic pigs and/or crossbred Inobuta. Four kinds of the GPIP genotypes were detected from 189 wild baors in Shikoku Island, but no European GPIP alleles were found. In 113 wild boars, no antibodies against Classical Swine Fever or Aujeszky's disease were detected, suggesting that they had not been exposed to those pathogens.

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Genetic relationship amongst the major non‐coding regions of mitochondrial DNAs in wild boars and several breeds of domesticated pigs

Cited by 83 publications

References 17 publications

Estimating the frequency of Asian cytochrome B haplotypes in standard European and local Spanish pig breeds

Estimating the frequency of Asian cytochrome B haplotypes in standard European and local Spanish pig breeds

Influence of Chinese breeds on pork quality of commercial pig lines

Genetic Profile and Serosurvey for Virus Infections of Japanese Wild Boars in Shikoku Island

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