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Title: DIFFERENTIAL CULTIVARS AND MOLECULAR MARKERS REVEAL TWO DISTINCT GROUPS OF ISOLATES OF <I>UROMYCES APPENDICULATUS</I>, THAT CORRESPOND TO THE ANDEAN AND MIDDLE AMERICAN GENE POOLS OF THEIR HOST.

Author
item PASTOR-CORRALES, M - UNIV OF LINC. NEB.
item Aime, Mary

Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: 5/15/2004
Publication Date: 6/1/2004
Citation: Pastor-Corrales, M.A., Aime, M.C. 2004. Differential cultivars and molecular markers reveal two distinct groups of isolates of <i>uromyces appendiculatus</i>, that correspond to the andean and middle american gene pools of their host.. Phytopathology. v. 95 p. S82.

Interpretive Summary:

Technical Abstract: We explored the virulence and molecular diversity in a collection of isolates of U. appendiculatus from different parts of the world. For virulence analysis we used a set of 12 common bean Phaseolus vulgaris L. differential cultivars, six each from the Andean and the Middle American bean gene pools. We also examined their genotypic diversity using the alpha 1 elongation factor. Phenotypic and genotypic results were congruent and revealed the existence of two distinct groups of isolates that corresponded to the Andean and Middle American gene pools of the common bean. These results also revealed that the U. appendiculatus Andean gene pool is less diverse and has greater host-specificity compared to the Middle American gene pool. A molecular assay has been developed to rapidly identify to which group isolates of U. appendiculatus belong.