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https://hdl.handle.net/2440/31
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Type: | Journal article |
Title: | Detection of novel genotypes in progeny from a controlled cross between isolates of Uncinula necator belonging to distinct phenetic groups |
Author: | Stummer, B. Scott, E. |
Citation: | Australasian Plant Pathology, 2003; 32(2):213-218 |
Publisher: | CSIRO Publishing |
Issue Date: | 2003 |
ISSN: | 0815-3191 1448-6032 |
Abstract: | Sexual recombination and segregation in 18 ascospore progeny of Uncinula necator were analysed by mating type (Mat locus), RFLP and PCR markers. Progeny were analysed from a cross of parental isolates representing the genetically distinct phenetic Groups I (AHd2) and II (BNb2). A total of 27 markers was analysed, consisting of four single loci (Mat locus and three RFLP probes), 16 multi-loci (three multi-copy fingerprinting probes) and seven PCR loci. Novel hybrid genotypes were detected in 28 % of the ascospore-derived progeny using the multi-copy RFLP probes, pUn122-11 and pUnP27, and the PCR primers (CAC)₅ and R1, confirming that recombination can occur between isolates representative of the two phenetic groups. This study provides evidence that out-crossing between isolates of U. necator generates novel genotypes and, as such, may have important implications for disease management practices, such as the durability of fungicides and host resistance. |
Keywords: | Grapevine powdery mildew recombination genetic analysis RFLP and PCR markers |
DOI: | 10.1071/AP03002 |
Published version: | http://dx.doi.org/10.1071/ap03002 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 2 |
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