Abstract
The genetic behavior of incompatibility in the Japanese radish is extremely complex. However, if the following items are assumed, these results may well be explained:
(1) Sporophytic control of the pollen.
(2) A single series of multiple S-alleles at one locus (S1_??_S10).
(3) The dominance relations between S genes in the pollen and the pistil.
Consequently, it is concluded that the incompatibility of the Japanese radish is of the Crepis-type.
Note added in proof. The work by HARUTA and YAMASHITA cited above has recently been reported in great detail: HARUTA, T. 1962: Studies on the genetics of self- and cross-incompatibility in cruciferous vegetables (in Jap. with Eng. summ.). Res. Bull. Takii Plant Breed. & Exp. Stat., Kyot. 2:1-169.
