Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Mapping Quantitative Trait Loci with Various Types of Progeny from Complex Pedigrees

  • Lee, C. (Lab. of Statistical Genetics, Institute of Environment and Life Science, Hallym University) ;
  • Wu, X.L. (Lab. of Molecular Biology Applied to Animal Production, Hunan Institute of Animal and Veterinary Science)
  • Received : 2001.05.08
  • Accepted : 2001.08.06
  • Published : 2001.11.01
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Abstract

A method for mapping quantitative trait loci (QTL) was introduced incorporating the information of mixed progeny from complex pedigrees. The method consisted of two steps based on single marker analysis. The first step was to examine the marker-trait association with a mixed model considering common environmental effect and reversed QTL-marker linkage phase. The second step was to estimate QTL effects by a weighted least square analysis. A simulation study indicated that the method incorporating mixed progeny from multiple generations improved the accuracy of QTL detection. The influence of within-genotype variance and recombination rate on QTL analysis was further examined. Detecting a QTL with a large within-genotype variance was more difficult than with a small within-genotype variance. Most of the significant marker-QTL association was detectable when the recombination rate was less than 15%.

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