*Publication No. 665 under Journal series of the G. B. Pant University of Agriculture and Technology, Experiment Station, Pantnagar.
A total of 4066 lines of soybean including 5 wild species were screened for resistance to rust and yellow mosaic diseases. Six lines, P. I. 200465 (Fusanaridaizu), P.I. 200466 (Gakubun), P.I. 200477 (Hondadaizu), P.I. 200490 (Keburi), P.I. 200492 (Komata) and P.I. 224268 were found to be free from rust. Thirteen lines developed pink spots on leaves at the point of contact with the rust spores inhibiting further sporulation. These were rated as moderately resistant. These lines are P.I. 88816-S, P.I. 181567, P.I. 200456, P.I. 200474, P.I. 200476, P.I. 224270, P.I. 200487, P.I. 285089, P.I. 341352, E.G. 11695, E.C. 50081, E.G. 26694 and E.C. 36956. Only one line viz. P.I. 171443 was found to be completely resistant to yellow mosaic. Of the 5 wild species G. ussuriensis was susceptible to rust as well as yellow mosaic. G.formosana was susceptible to rust but completely resistant to yellow mosaic. G. tabacina, G. tomentella and G. wightii were resistant to both rust and yellow mosaic. Successful crosses were achieved between G. max and G. ussuriensis and G. formosana.
