DNA fingerprint bands applied to linkage analysis with quantitative trait loci in chickens.

An efficient approach to detect association between quantitative traits and bands of DNA fingerprint patterns uses intra-family tail analysis, which compares fingerprints of DNA mixes from individuals at the two tails of a phenotypic distribution. In analysis of 67 paternal half-sibs of a meat-type chicken family, of 57 sire bands generated by two probes, one sire-specific band (S6.6) was associated with abdominal fat deposition. The band effect was estimated by a linear model analysis to be 0.88 standard deviations, or about 30% of the family mean. The association between band S6.6 and abdominal fat was further examined by testing progeny of paternal half-sibs of the chickens which were used in the tail analysis, establishing genetic linkage between the DNA marker and a genetic locus affecting abdominal fat deposition.