Abstract
1. Crossing 20 flowers of V-icia sativa L. with the pollen of V. tetrasperleea MOENCH., 1 pod containing 3 seeds was obtained. The F1 seeds were smaller than the mother seeds, and the number of days necessary for germination was larger compared with that of the parents. 2. The growth of Fl plants in young stage was poor, but they became gradually more vigourous later. 3. In Fl the type of branching, the colours of stems and leaflets were intermediate betweeh the parents, the leaflets being broader conipared with the parents. The tendrils were long resembling those of the father plant. The hairs at the border of leaflets were shorter and thicker in Vicia sativa L., Ionger and thinner in V. tetrasperleea MOENcH., and in F1 they were longer and thicker. The number of compound leaves grown from a node was smaller resembling that of V. tetrasperleea MOENCH. The colours of standards and wings of F1 flowers were rather rose resembling those of V. sativa L., though were more or less tinged with violet. In general appearance, however, the F1 plants quite resemble the mother plant, showing a matroclinous tendence of inheritance. 4. The chromosome number in V. sativa L, is n=6, and in V. tetrasperma MOENCH. n=7, so that the diploid number of F1 is 13. In F1 the chromosome conjugation at lst metaphase of PMC showed most frequently 1111+511, while other types of conjugation being observed. At ana- and telophases the lagging chrornosomes and chromosome bridges were frequently found. In the tetrad stage a small amount of pentads and hexads was observed. 5, In F1 the % of good pollen grains were 50-63, and the seed fertility was quite good like those of the parents.
