1Research Station, Mahabaleswar (Maha.).
Indian Agricultural Research Institute, Regional Station (Wheat Breeding), Indore-452 001 (M.P.)
*Part 2 of Evaluation of germplasm of wheat for horizontal and vertical resistance Part 1 appeared in Indian J. Genet. (1977), 37: 327.
One thousand five hundred entries of exotic durum and five hundred entries of exotic aestivum, were screened under natural conditions for rusts and powdery mildew; and in the glasshouse for individual races of leaf and stem rust. The entries were sown in 1 m. row each at Indore, Dhaulakuan, Ropar, Mahabaleswar and Wellington from 1974 to 1976 under medium fertility conditions. The seedlings were also raised in 10 cm. pots in the glasshouse for testing with individual races of the rusts.
About 34 entries were found promising out of this collection of 2,000. E 898, ED 2141, E 3115 and EA 8068 showed excellent field resistance to all the 3 rusts, while ED 1862; EA 7190, 7300, ED 7393 and 8678 to only black and brown rusts. All these entries also exhibited resistance to a number of races of black and brown rusts indicating horizontal resistance in them. Other entries manifested resistance to only one or the other rusts suggesting vertical resistance. ED 2403 and 6052toleaf andstriperusts; E4165 to stemrust;andE931,ED 1598B, E-3109; EA 6016 and 6032 to only leaf rust, showed excellent resistance (ACI 0⋅1–5). All these entries also possessed resistance to powdery mildew except E 898 and 931.
