Phylogenetic relationships of Cheju horses to other horse breeds as determined by mtDNA D-loop sequence polymorphism

Ki, Kim; Yh, Yang; Ss, Lee; Park, C; Ma, Ruijuan; Jl, Bouzat; Ha, Lewin

doi:10.1046/j.1365-2052.1999.00419.x

Cited by 76 publications

(76 citation statements)

References 23 publications

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“…The wide variability of the D-loop sequences among our populations may be caused by the multiple origins of the breeds bred in Italy, in accordance with the results of other authors studying different horse populations [8,10,13]. In reference to these breeds, the high variability of the mtDNA haplotypes within Italian populations is probably due to the important role played by other horse populations influencing the evolution of Italian horse breeds.…”

Section: Discussionsupporting

confidence: 78%

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Mitochondrial D-loop sequence variation among Italian horse breeds

et al. 2004

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-The genetic variability of the mitochondrial D-loop DNA sequence in seven horse breeds bred in Italy (Giara, Haflinger, Italian trotter, Lipizzan, Maremmano, Thoroughbred and Sarcidano) was analysed. Five unrelated horses were chosen in each breed and twenty-two haplotypes were identified. The sequences obtained were aligned and compared with a reference sequence and with 27 mtDNA D-loop sequences selected in the GenBank database, representing Spanish, Portuguese, North African, wild horses and an Equus asinus sequence as the outgroup. Kimura two-parameter distances were calculated and a cluster analysis using the Neighbourjoining method was performed to obtain phylogenetic trees among breeds bred in Italy and among Italian and foreign breeds. The cluster analysis indicates that all the breeds but Giara are divided in the two trees, and no clear relationships were revealed between Italian populations and the other breeds. These results could be interpreted as showing the mixed origin of breeds bred in Italy and probably indicate the presence of many ancient maternal lineages with high diversity in mtDNA sequences.mitochondrial DNA / D-loop / biodiversity / phylogeny / Italian horse

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Section: Discussionsupporting

confidence: 78%

“…The mitochondrial DNA D-loop region is very polymorphic as reported by many authors (2,4,5,6,7,8,9,10,12,13,22,24). Twenty-two haplotypes were identified in our samples.…”

Section: Discussionmentioning

confidence: 50%

Mitochondrial D-loop sequence variation among Italian horse breeds

et al. 2004

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“…The Lipizzan haplotypes obtained were compared to equine control region sequences retrieved from the GenBank database: AF064627-32, AF326635-86 [17], AF072975-96 [10], AF169009-10, AF014405-17 [8], AF056071 [8], D23665-6 [5], D14991 [5], AF055876-9 [13], AF132568-94 [2], AF431965-9, X79547 [19], representing sequences of domestic horses (a variety of breeds from all over the world), sequences of Przewalski's wild horses and sequences of late Pleistocene horses from Alaska. Multiple alignment was performed using Clustal W [16].…”

Section: Methodsmentioning

confidence: 99%

History of Lipizzan horse maternal lines as revealed by mtDNA analysis

et al. 2002

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-Sequencing of the mtDNA control region (385 or 695 bp) of 212 Lipizzans from eight studs revealed 37 haplotypes. Distribution of haplotypes among studs was biased, including many private haplotypes but only one haplotype was present in all the studs. According to historical data, numerous Lipizzan maternal lines originating from founder mares of different breeds have been established during the breed's history, so the broad genetic base of the Lipizzan maternal lines was expected. A comparison of Lipizzan sequences with 136 sequences of domestic-and wild-horses from GenBank showed a clustering of Lipizzan haplotypes in the majority of haplotype subgroups present in other domestic horses. We assume that haplotypes identical to haplotypes of early domesticated horses can be found in several Lipizzan maternal lines as well as in other breeds. Therefore, domestic horses could arise either from a single large population or from several populations provided there were strong migrations during the early phase after domestication. A comparison of Lipizzan haplotypes with 56 maternal lines (according to the pedigrees) showed a disagreement of biological parentage with pedigree data for at least 11% of the Lipizzans. A distribution of haplotype-frequencies was unequal (0.2%-26%), mainly due to pedigree errors and haplotype sharing among founder mares.Lipizzan horse / control region / origin / phylogeny / pedigree

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“…In terms of conservation, the observed phylogenetic relationships should help to preserve the more original genetic groups and protect their genetic variability. At a species level, horses possess relatively high haplotype diversity in the D-loop region of mtDNA (Kim et al, 1999;Vilà et al, 2001;Hill et al, 2002;Royo et al, 2005). The mean number of pairwise differences observed among all haplotypes was estimated at 8.81 or 2.72%.…”

Section: Discussionmentioning

confidence: 99%

“…The control region of the mitochondrial DNA (mtDNA) is, due to its high mutation rate, lack of recombinations and maternal inheritance, a very useful marker system for population and evolutionary biology. The mitochondrial DNA studies in horses have proved to be useful to characterize intra-and inter-breed relationships (Ishida et al, 1994;Ishida et al, 1995;Kavar et al, 1999;Kim et al, 1999;Vilà et al, 2001;Jansen et al, 2002;Hill et al, 2002;Mirol et al, 2002;Cozzi et al, 2004;Lopes et al, 2005;Royo et al, 2005;McGahern et al, 2006).…”

mentioning

confidence: 99%

Mitochondrial D-loop sequence variation among autochthonous horse breeds in Croatia

Ivanković¹,

Ramljak²,

Konjačić³

et al. 2009

Czech J. Anim. Sci.

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Genetic variation in three Croatian coldblood horse populations was analysed using a sequence analysis of the proximal part (nt 15 498-15 821) of the D-loop region of mtDNA. Twenty unrelated horses were chosen from the Posavina horse and the Croatian Coldblood breeds and fifteen horses from the Murinsulaner horse population. Sequencing of the proximal part of the mtDNA D-loop region revealed 26 polymorphic sites representing thirty haplotypes which were clustered into eight haplogroups. A wide variety of mitochondrial haplotypes of the analysed horse breeds were clustered into eight different haplogroups. Two haplogroups (D and F) were specific to Posavina horse, five haplogroups were shared among the Croatian Coldblood and Murinsulaner horse, the fact that can be explained by selection strategy at the beginning of the 20 th century and possible gene flow between the two populations. These results indicate the presence of many ancient maternal lineages with high diversity in mtDNA. The genetic information based on mtDNA typing has a great importance for the future breed conservation strategy, especially for the critically endangered breed such as Murinsulaner horse.

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Phylogenetic relationships of Cheju horses to other horse breeds as determined by mtDNA D-loop sequence polymorphism

Cited by 76 publications

References 23 publications

Mitochondrial D-loop sequence variation among Italian horse breeds

Mitochondrial D-loop sequence variation among Italian horse breeds

History of Lipizzan horse maternal lines as revealed by mtDNA analysis

Mitochondrial D-loop sequence variation among autochthonous horse breeds in Croatia

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