Abstract
1. The self-pollinated capsules of a stock of Hosta plantaginea Aschers. bear good seeds and aborted ovules in the ratio 1:3 as is shown in the Table 1.
2. The capsules of the same plant when pollinated with the pollen of H. plantaginea Aschers. var. japonica Kikuchi et F. Maekawa bear good seeds and aborted ovules in the ratio 1:1 as is shown in the Table 2.
3. From these data we can assume that Hosta plantaginea Aschers. at least the stock under my observation is a monogenic heterozygous plant of L and l; L denoting a dominant lethal gene causing the partial sterility of this plant, and l its allele, a recessive gene. LL and Ll cause the abortion of the embryo and ll produces a fertile embryo. The gene L does not affect any gametes.
4. Hosta plantaginea Aschers. var. japonica Kikuchi et F. Maekawa which is a self-sterile or at least a later season fertile plant has no L gene in it. When pollinated with the pollen of this plant H. plantaginea Aschers. bears good capsules containing good seeds and aborted ovules in the ratio 1:1.
