Statistical efficiency of five types of progeny in detecting linkage between marker and quantitative trait loci
1996
Reano, C.V.E.
The efficiency of five types of progenies in detecting linkage between a marker gene and a quantitative trait locus (QTL) were compared. These five progenies include the backcross generations, backcross to the parent 1 (BC 1) and the backcross to parent 2 (BC 2), and three selfed progenies, F3, F4, and F5. The results showed that the efficiency of backcross generations is a function of the level of dominance exhibited by the QTL. In contrast the selfed progenies were not affected by the level of dominance. The effect of recombination is to increase the sample size for all progenies. However, for small values of r, the number of offsprings obtained seem to be quite feasible for an experimental set-up. It was shown that at values of r beyond 0.2 the required number of offsprings may not be too practical. The backcross type of progenies were found to require less offsprings making it more efficient, however the selfed progenies may be more efficient with increasing effects of the environment which contribute to the increased variance within the marker genotypes
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