Partial factorial and nested mating designs were used, respectively, to generate the G2 and G3 generations, with 162 and 156 full-sib families (from 95 sires and 97 dams, and 93 sires and 156 dams in the two generations, respectively).
Full-sib nested half-sib and partial factorial mating designs were used to generate families with half-sibling relationships (sharing either a male or female parent) for estimation of heritability.
However, with a factorial family structure, differences in rates of inbreeding due mating designs were minor.
We also compared MC with MCAC, a novel method proposed by Henryon et al. [ 2], but found that differences between these mating designs were small, with the balance of evidence pointing to MC as being more effective.
Three mating designs were studied: (1) Random mating (RAND), in which selected sires and dams were paired by random sampling without replacement from the candidates (2) Minimum coancestry mating (MC), where the sets of male and female mating pairs were chosen in order to minimize the average coancestry between the mates, as calculated from the pedigree.
All these mating schemes have shown some benefits in increased genetic gain and/or reduced inbreeding but comparisons reported in the literature have not concluded on any clearly superior mating design, partly because only a limited number of mating designs were considered in each of the comparisons.
Removing the hierarchical mating restriction of one male per female that was used here in the simulation and allowing for factorial or cross-classified mating designs is expected to further reduce rates of inbreeding [ 23] or could reduce the number of parents needed for the same rate of inbreeding.
However, no fruit setting was achieved in crosses between GyM-H and GyM-F flowers and by selfing GyM-H (Table 2).> -wrap-foot> Replications =3, N =30, No. of crosses/ mating design are 10 for all the above sets.
The mating design was A×A, B×B, (AB or BA)×(AB or BA).
To make use of the diversity, an efficient mating design is needed to break the undesirable linkages and to convert landraces to breeding-ready genetic resources.
