Simultaneous estimation of additive and dominance genetic variance in heterozygous and homozygous populations

A new mating procedure for estimating additive and dominance genetic variances in a random mating population is presented. With this procedure, m number of plants from a random mating population are selfed to produce S1 families and are also crossed to n inbreds. Subsequently, all the m × n hybrids are selfed. while keeping remnant crossed seeds for the final experiment. The final experiment comprises m × n hybrids, their m × n selfs, m S1, and m S2 families as well as n inbreds. The analysis of the data, recorded on the quantitative traits provides information for both the random mating as well as the inbred populations. Epistasis can be detected by two different tests. The analysis can be applied to F2 instead of random mating populations with less effort.Key words: random mating, genetic variance, epistasis, inbred.