Incompatibility and hybrid breeding in rye.
1984
Wricke G.
The production of F1 hybrid seed of rye with the aid of the two-locus incompatibility system is suggested. Inbred lines derived from a single genotype have a high degree of within line incompatibility. When two such lines are interplanted the seed produced will be largely of hybrid origin. If the lines contain different incompatibilty alleles at the two loci a mixed planting of two lines will produce 83% hybrids between the lines. First results indicate that such a high percentage is reached in experimentally developed hybrids. In this paper the probability of crosses with 83% intercrossing, which depends on the number of alleles at the incompatibility loci, is investigated. Furthermore, experimental results also pointed at the selection of favourable alleles during the propagation of the parental lines. The additional effect of such a selection on the performance of the resulting hybrids is analysed and formulae are given for the case without and with epistasis.
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