Abstract
"Nori-Asa" (Glutinous Hemp) is an amphidiploid crop which was bred crossing Abelmoschus esculentus with Abel. Manihot. It first appeared in the F2 generation and kept itself constant later on. The fertility of F1∼F10 was studied, the number of seeds per pod having been taken as the index. The avarage fertility calculated for a number of lines of F1, F2 and F3 is 6.2, 29.2 and 29.2 grains respectively, and that of F4∼F10 is ca. 40 grains not showing any further increase. However, the fertility differs more or less in different lines, reaching in a line as far as 48.0 grains per pod in F10.
