Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Characterization of QTL for Growth and Meat Quality in Combined Pig QTL Populations

  • Li, Y. (School of Biotechnology, Yeungnam University) ;
  • Choi, B.H. (Animal Genomics and Bioinformatics Division, National Institute of Animal Science) ;
  • Lee, Y.M. (School of Biotechnology, Yeungnam University) ;
  • Alam, M. (School of Biotechnology, Yeungnam University) ;
  • Lee, J.H. (Gyeongbuk Livestock Research Institute) ;
  • Kim, K.S. (Department of Animal Science, Chungbuk National University) ;
  • Baek, K.H. (School of Biotechnology, Yeungnam University) ;
  • Kim, J.J. (School of Biotechnology, Yeungnam University)
  • Received : 2011.07.12
  • Accepted : 2011.08.19
  • Published : 2011.12.01
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Abstract

This study was conducted to detect quantitative trait loci (QTL) for thirteen growth and meat quality traits in pigs by combing QTL experimental populations. Two F2 reference populations that were sired by Korea native pig (KNP) and dammed by Landrace (LN) or Yorkshire (YK) were generated to construct linkage maps using 123 genetic markers (mostly microsatellites) and to perform QTL analysis on porcine chromosomes (SSCs) 1, 2, 3, 6, 7, 8, 9, 11, 13, 14, and 15. A set of line-cross models was applied to detect QTL, and a series of lack-of-fit tests between the models was used to characterize inheritance mode of QTL. A total of 23, 11 and 19 QTL were detected at 5% chromosome-wise level for the data sets of KNP${\times}$LN, KNP${\times}$YK cross and joint sets of the two cross populations, respectively. With the joint data, two Mendelian expressed QTL for live weight and cooking loss were detected on SSC3 and SSC15 at 1% chromosome-wise level, respectively. Another Mendelian expressed QTL was detected for CIE a on SSC7 at 5% genome-wise level. Our results suggest that QTL analysis by combining data from two QTL populations increase power for QTL detection, which could provide more accurate genetic information in subsequent marker-assisted selection.

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References

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