| dc.description |
YELLOW rust (Puccinia striiformis) is a hazard to the cultivation of wheat (Triticum aestivum 2n = 6x = 42) in many temperate regions. The most economic method of limiting losses of yield caused by the disease lies in the cultivation of varieties with genetically determined resistance to infection. Most current varieties owe their resistance to the activities of a few major genes which they carry in various combinations. New sources of resistance, however, must be sought continually because mutation or somatic recombination in the pathogen can give rise to genetic variants against which particular resistance genes or combination of genes, in current use, cease to be effective. |
