EXPRESSION AND INHERITANCE OF LEAF RUST RESISTANCE GENE LR37 IN WHEATSEEDLINGS

To establish criteria for early-growth stage detection of Lr37, the ef fects of wheat (Triticum aestivum L.) developmental stage, pathotype o f Puccinia recondita Rob. ex Desm. f. sp. tritici Eriks. and temperatu re on resistance expression were studied. Infection types indicated th at interactions among these factors occurred. Resistance in primary le aves (infection types ;l to 2-) was most clearly detected at 15-degree s-C. Testing of backcross-F1, F2 and F3 populations involving Lr37 at 15-degrees-C indicated segregation of a single recessive gene in seedl ings.