Abstract
To reveal the effects of 20 cytoplasms of Triticum and Aegilops species on seed germination of common wheat, a total of 240 alloplasmic lines were investigated, using the data accumulated in the Laboratory of Genetics, Faculty of Agriculture, Kyoto University, since 1966. The results show reduced seed germination in some alloplasmic lines; this reduction can be attributed to the interaction between the T. timopheevi type cytoplasms (G type) and the nuclei of four common wheats, T. aestivum var, erythrospermum, strain P168, strain Salmon and cv. S-615. All of the alloplasmic lines showing reduced germination frequently showed pre-harvest sprouting.
