The role of specific genes in breeding for durable stem rust resistance in wheat and triticale. Chapter 1.
1988
McIntosh R.A.
Breeding for resistance to stem rust in wheat has been succesful. The resistances deployed in agriculture have depended on single identifiable genes and combinations of identifiable genes. The adult plant resistance gene, Sr2, has contributed to durable resistance in many areas. Stem rust resistant wheats for the northeastern wheat areas of Australia have depended on the use of resistances which are replaced following the detection of virulent pathotypes. The deployment of genes in this way depends on relevant pathogenicity surveys, a knowledge of the genes present in wheat cultivars, and industry cooperation in rapid cultivar replacement. Genetic vulnerability to stem rust in the CIMMYT triticale program can be reduced by using information generated in Australia. The narrow genetic base for resistance can be widened by the use of European triticales, rye, and wheat. However, genetic diversity between wheat and triticale should be maintained.
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