By M. TANAKA
Laboratory of Genetics, Kyoto University, Kyoto, Japan
It was reported in WIS No.1 that the wild types of Aegilops and Triticum have a winter-growing habit which is considered to be the ancestral type. While, the 4x-strain in Iraq had a spring type and the 6x-strains in Tashkent an intermediate type.
23 out of 58 strains of Aegilops crassa collected by Drs. Kihara and Yamashita, in Afghanistan and Iran in 1955, bave been studied for growing habits in the experimental field in Kyoto (Table 1). As shown in the table, the strains of a winter type have not been found and the strains of spring or intermediate type have been found only in 3 regions in Afghanistan, in both 4x and 6x strains. Spring type was found in Teheran, and intermediate type in Tabriz of Iran.
