Vr2: a new apple scab resistance gene
Reports from several European countries of the breakdown of the Vf resistance, the most frequently used source of resistance in breeding programs against apple scab, emphasize the urgency of diversifying the basis of apple scab resistance and pyramiding different apple scab resistances with the use...
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| Veröffentlicht in: | Theoretical and applied genetics 2004-09, Vol.109 (5), p.1087-1092 |
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| container_title | Theoretical and applied genetics |
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| creator | PATOCCHI, A BIGLER, B KOLLER, B KELLERHALS, M GESSLER, C |
| description | Reports from several European countries of the breakdown of the Vf resistance, the most frequently used source of resistance in breeding programs against apple scab, emphasize the urgency of diversifying the basis of apple scab resistance and pyramiding different apple scab resistances with the use of their associated molecular markers. GMAL 2473 is an apple scab resistant selection thought to carry the resistance gene Vr. We report the identification by BSA of three AFLP markers and one RAPD marker associated with the GMAL 2473 resistance gene. SSRs associated with the resistance gene were found by (1) identifying the linkage group carrying the apple scab resistance and (2) testing the SSRs previously mapped in the same region. One such SSR, CH02c02a, mapped on linkage group 2, co-segregates with the resistance gene. GAML 2473 was tested with molecular markers associated with other apple scab resistance genes, and accessions carrying known apple scab resistance genes were tested with the SSR linked to the resistance gene found in GMAL 2473. The results indicate that GMAL 2473 does not carry Vr, and that a new apple scab resistance gene, named Vr2, has been identified. |
| doi_str_mv | 10.1007/s00122-004-1723-8 |
| format | Article |
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GMAL 2473 is an apple scab resistant selection thought to carry the resistance gene Vr. We report the identification by BSA of three AFLP markers and one RAPD marker associated with the GMAL 2473 resistance gene. SSRs associated with the resistance gene were found by (1) identifying the linkage group carrying the apple scab resistance and (2) testing the SSRs previously mapped in the same region. One such SSR, CH02c02a, mapped on linkage group 2, co-segregates with the resistance gene. GAML 2473 was tested with molecular markers associated with other apple scab resistance genes, and accessions carrying known apple scab resistance genes were tested with the SSR linked to the resistance gene found in GMAL 2473. 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GMAL 2473 is an apple scab resistant selection thought to carry the resistance gene Vr. We report the identification by BSA of three AFLP markers and one RAPD marker associated with the GMAL 2473 resistance gene. SSRs associated with the resistance gene were found by (1) identifying the linkage group carrying the apple scab resistance and (2) testing the SSRs previously mapped in the same region. One such SSR, CH02c02a, mapped on linkage group 2, co-segregates with the resistance gene. GAML 2473 was tested with molecular markers associated with other apple scab resistance genes, and accessions carrying known apple scab resistance genes were tested with the SSR linked to the resistance gene found in GMAL 2473. 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Psychology</topic><topic>Genes, Plant - genetics</topic><topic>Genetics</topic><topic>Genetics of eukaryotes. 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GMAL 2473 is an apple scab resistant selection thought to carry the resistance gene Vr. We report the identification by BSA of three AFLP markers and one RAPD marker associated with the GMAL 2473 resistance gene. SSRs associated with the resistance gene were found by (1) identifying the linkage group carrying the apple scab resistance and (2) testing the SSRs previously mapped in the same region. One such SSR, CH02c02a, mapped on linkage group 2, co-segregates with the resistance gene. GAML 2473 was tested with molecular markers associated with other apple scab resistance genes, and accessions carrying known apple scab resistance genes were tested with the SSR linked to the resistance gene found in GMAL 2473. 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| subjects | Ascomycota Biological and medical sciences Chromosome Mapping Classical genetics, quantitative genetics, hybrids Crop diseases Crosses, Genetic Fundamental and applied biological sciences. Psychology Genes, Plant - genetics Genetics Genetics of eukaryotes. Biological and molecular evolution Genomics Immunity, Innate - genetics Malus - genetics Minisatellite Repeats - genetics Nucleic Acid Amplification Techniques Plant Diseases - genetics Plant Diseases - microbiology Polymorphism, Restriction Fragment Length Pteridophyta, spermatophyta Random Amplified Polymorphic DNA Technique Vegetals |
| title | Vr2: a new apple scab resistance gene |
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