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ARS Home » Midwest Area » St. Paul, Minnesota » Cereal Disease Lab » Research » Publications at this Location » Publication #126485
Title: SIMPLE INHERITANCE OF LEAF RUST RESISTANCE IN TWO WHEAT CULTIVARS WITH SLOWRUSTING RESISTANCE

Author
item Kolmer, James
item LIU, JEAN - AGREVO CANADA

Submitted to: Plant Pathology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/28/2001
Publication Date: 9/1/2001
Citation: KOLMER, J.A., LIU, J.Q. SIMPLE INHERITANCE OF LEAF RUST RESISTANCE IN TWO WHEAT CULTIVARS WITH SLOWRUSTING RESISTANCE. PLANT PATHOLOGY. 2001. v. 50. p. 546-551.

Interpretive Summary: The wheat cultivars BH1146 and Westphal 12A were shown to have the gene Lr34 which is an important gene that gives resistance to the fungus Puccinia triticina which is the cause of the disease leaf rust of wheat. Westphal 12A was also determined to have three other resistance genes which contained resistance to leaf rust, while BH1146 was shown to also carry resistance gene Lr13. Gene Lr34 has been found in many wheats throughout the world, and is the most important gene for leaf rust resistance in wheat. One of the resistance genes in Westphal 12A also conditions good resistance to leaf rust and may be useful to incorporate into wheat breeding germplasm in the United States. Wheat breeders may also be able to use this gene to improve leaf rust resistance in US wheat cultivars.

Technical Abstract: The wheat cultivars Westphal 12A and BH1146 were characterized in previous studies as having slow rust resistance to the leaf rust pathogen Puccinia triticina. In the present stude, genetic analysis showed that Westphal 12A has three genes which conditioned resistance in seedling plants and the gene Lr34 which is optimally expressed in adult plants. The three seedling resistance genes in Westphal 12A may be new leaf rust resistant genes. BH1146 was shown to have the adult plant genes Lr13 and Lr34. Wheat cultivars with sow rusting resistance to leaf rust may actually have lr13, lr14 or other previously described Lr genes. Genetic analysis of wheats with slow rusting resistance should be conducted in such a manner to allow direct comparison of results with previous studies that have identified specific Lr resistance genes.