Power to detect QTL in a free-living polygynous population

The power to detect quantitative trait loci (QTL) is discussed as it relates to a free-living polygynous population and as used to study a complex red deer pedigree. The power to detect linkage in a complex pedigree was contrasted with that of the half-sib design. In many populations it is not possible to carry out a cross with the organism studied to detect QTL in natural populations. QTL detection may be possible in carefully studied natural populations, but detailed life history data and good pedigree information are essential.