Inheritance of Field Reaction to Brown Rust and Other Characters in Inter-Varietal Crosses of Triticum Aestivum L.

The mode of inheritance of field reaction to brown rust and a number of other characters was studied in crosses involving Rionegro, Frondoso and Yaqui 53 with variety N.P. 824 and H 167: 7-4-4-8 with Ridley and N.P. 770.

The field resistance for brown rust of each of the varieties of Rionegro, Yaqui 53, Frondoso and H 167: 7-4-4-8 was controlled by two pairs of dominant complementary factors present in them.

The brown rust resistance of Yaqui 53 in the cross N.P. 824 X Yaqui 53, was inhibited by a pair of dominant inhibitors present in the variety N.P. 824.

The strains, H 167: 7-4-4-8, Frondoso and Rionegro showed indication of the common genes for brown rust resistance.

The characters, glume colour, glume pubescence, grain shattering habit, auricle colour and awning were monogenically controlled.

The semi-erect early growth-habit was monogenically dominant over spreading-habit. The inheritance of grass clumping was controlled by a dominant factor and a dominant inhibitor.

Yaqui 53 and Rionegro were found to carry one dominant factor and Bowie Texas and Frondoso three pairs of dominant duplicate factors for red grain colour.