抄録
Ear-scab dissase injury of wheat is enormous almost every year in Tokai-Kinki District. So, it is vety important problem for us to breed up scab-resistant wheat varieties. During the 3 yeaf course of investigation of varietal resistance, of this disease, we noticed a morphological character of varieties had some relacion to the resistance in case of wheat, that Was the leaf-angle between I st and 2 nd nor-m.al leaves of wheat seedling. Seedlings were grown on several conditions and 'Lhe leafangle ivere meaSured btweeil I st and 2 nd normal leaves at 3 rd leaf stage, about 10 days after germination. Sdme representative varieties were chosen accord-ing to resistant and susceptible groups. The results indicated, as shown on Table I, 2, 3 and Figure 1, 2, that those varieties of narrower leaf-angle showed to be more resistant, as a whole, than wider ones, though the reason was not yet clear. The correlation coef:cients between leaf-angles and scab-resistance were as follows : r.=0. 6341:!::O. 0648 (88 varie'ties 1950), rO. 5203::O. 0898 (66 varieties 1951).
