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KMID : 1025520040460060937
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Journal of Animal Science and Technology
2004 Volume.46 No. 6 p.937 ~ p.946
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Complete Mitochondrial Genome Sequence and Genetic Diversity of Duroc Breed
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Cho In-Cheol
Han Sang-Hyun
Choi Y. L.
Ko Moon-Suck
Lee Jung-Gyu
Lee Jun-Heon
Jeon Jin-Tae
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Abstract
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Duroc is widely used to improve the meat quality and productivity. To elucidate the phylogenetic relation and the sequence specificity for the maternal property, the complete sequence of mitochondrial genome was determined and the population diversity of Duroc was investigated in this study. The length of mtDNA tested is 16,584-bp. There are several insertion/deletion mutations in the control region and coding regions for tRNA and rRNA, respectively, but not in peptide-coding regions. Four peptide-coding genes(COⅡ, COⅢ, ND3 and ND4) showed incomplete termination codon sequences such as T--, and two(ND2 and ND4L) did alternative initiation codons(AIC), respectively. Especially, the initiation codon sequences of ND2 gene were polymorphic in this population. Polymorphisms were detected in 11-bp duplication motif within control region as well as ND2 and CYTB. Variation patterns observed from the tests on three mtDNA regions were linked completely and then two haplotypes obtained from combining the data dividing this population. Duroc mtDNA is observed at the European pig cluster in the phylogenetic tree, however, the results from the population analyses supported previous opinions. This study suggests that the breed Duroc was mainly originated from the European pig lineage, and Asian lineage was also used to form the pig breed Duroc as maternal progenitors.
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KEYWORD
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Duroc, Haplotype, Maternal origin, Mitochondrial genome, Sus scrofa
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