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Cloning, mapping and association study with carcass traits of the porcine SDHD gene.

A 1320-bp cDNA containing the full coding region of the porcine succinate dehydrogenase complex, subunit D (SDHD) gene was obtained by random sequencing of clones from a Chinese Tongcheng pig 55-day fetal longissimus dorsi muscle cDNA library. Analysis of the SDHD gene across the INRA-University of Minnesota porcine radiation hybrid panel indicated close linkage with microsatellite marker SW2401, located on SSC9p21. The open reading frame of this cDNA covers 480 bp and encodes 159 amino acids. The deduced porcine amino acid sequence showed greater similarity with human and bovine protein sequences than with those from mouse and rat. The BLAST analysis of the porcine SDHD to NCBI identified Unigene Cluster Ssc.2586. Possible single nucleotide polymorphisms (SNP) were identified by alignment of expressed sequence tags in the cluster. The polymerase chain reaction (PCR) single strand conformation polymorphism, sequencing, and PCR restriction fragment length polymorphism were used to confirm and detect a synonymous polymorphic MboI site within the open-reading frame. Allele frequencies of this SNP were investigated in two commercial and five Chinese local pig breeds. These five Chinese breeds had very high frequencies for one allele, whereas frequencies of both alleles were intermediate in Large White and Duroc. An association analysis suggested that different SDHD genotypes have significant differences in loin-muscle area (P < 0.01).[1]

References

  1. Cloning, mapping and association study with carcass traits of the porcine SDHD gene. Zhu, Z.M., Zhang, J.B., Li, K., Zhao, S.H. Anim. Genet. (2005) [Pubmed]
 
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