A linkage map of diploid Avena based on RFLP loci and a locus conferring resistance to nine isolates of Puccinia coronata var. ‘avenae’
| Autor: | Roger P. Wise, Michael D. Lee, P. J. Rayapati, J. W. Gregory |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Genetics
education.field_of_study biology Population food and beverages Locus (genetics) General Medicine Plant disease resistance biology.organism_classification Puccinia coronata Gene mapping Genetic linkage Avena strigosa Restriction fragment length polymorphism education Agronomy and Crop Science Biotechnology |
| Zdroj: | Theoretical and Applied Genetics. :831-837 |
| ISSN: | 1432-2242 0040-5752 |
| DOI: | 10.1007/bf00224505 |
| Popis: | An F2 oat population was produced by crossing the diploid (n=7) species Avena strigosa (CI 3815) with A. wiestii (CI 1994), resistant and susceptible, respectively, to 40 isolates of Puccinia coronata, the causal agent of crown rust. Eighty-eight F2 individuals were used to construct an RFLP linkage map representing the A genome of cultivated hexaploid oat. Two hundred and eight RFLP loci have been placed into 10 linkage groups. This map covers 2416 cM, with an average of 12 cM between RFLP loci. Eighty-eight F3 lines, derived from F2 individuals used to construct the map, were screened for resistance to 9 isolates of P. coronata. One locus, Pca, was found to confer a dominant resistance phenotype to isolates 203, 258, 263, 264B, 290, 298, 325A, and 345. Pca also conferred resistance to isolate 276; however, an unlinked second gene may also be involved. |
| Databáze: | OpenAIRE |
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