Identification of a major QTL together with several minor additive or epistatic QTLs for resistance to fire blight in apple in two related progenies

Autor: Marie-Noëlle Brisset, Charles-Eric Durel, D. Drouet, W.E. van de Weg, Fanny Calenge, Jean-Pierre Paulin, Caroline Denancé
Přispěvatelé: Unité mixte de recherche génétique et horticulture Genhort, Université d'Angers (UA)-Institut National de la Recherche Agronomique (INRA)-Institut National d'Horticulture, Unité de recherche Pathologie végétale et phytobactériologie, Institut National de la Recherche Agronomique (INRA), ProdInra, Migration
Rok vydání: 2004
Předmět:
0106 biological sciences
Malus
disease resistance
scab resistance
Quantitative Trait Loci
Locus (genetics)
[SDV.GEN] Life Sciences [q-bio]/Genetics
Erwinia
Plant disease resistance
Quantitative trait locus
01 natural sciences
03 medical and health sciences
PRI Biodiversiteit en Veredeling
evolution
Genetics
cultivars
Erwinia amylovora
Cultivar
genes
MALUS X DOMESTICA
Crosses
Genetic
030304 developmental biology
Plant Diseases
2. Zero hunger
0303 health sciences
[SDV.GEN]Life Sciences [q-bio]/Genetics
Analysis of Variance
biology
venturia-inaequalis
fungi
linkage maps
Venturia inaequalis
food and beverages
Chromosome Mapping
Epistasis
Genetic
General Medicine
organization
biology.organism_classification
Immunity
Innate
PRI Biodiversity and Breeding
erwinia-amylovora
Fire blight
Agronomy and Crop Science
010606 plant biology & botany
Biotechnology
Zdroj: TAG Theoretical and Applied Genetics
TAG Theoretical and Applied Genetics, Springer Verlag, 2005, 11, pp.128-135
Theoretical and Applied Genetics, 111(1), 128-135
Theoretical and Applied Genetics 111 (2005) 1
HAL
ISSN: 0040-5752
1432-2242
Popis: Although fire blight, caused by the bacterium Erwinia amylovora, is one of the most destructive dis- eases of apple (Malus · domestica) worldwide, no ma- jor, qualitative gene for resistance to this disease has been identified to date in apple. We conducted a quan- titative trait locus (QTL) analysis in two F1 progenies derived from crosses between the cultivars Fiesta and either Discovery or Prima. Both progenies were inocu- lated in the greenhouse with the same strain of E. am- ylovora, and the length of necrosis was scored 7 days and 14 days after inoculation. Additive QTLs were identified using the MAPQTL software, and digenic epi- static interactions, which are an indication of putative epistatic QTLs, were detected by two-way analyses of variance. A major QTL explaining 34.3-46.6% of the phenotypic variation was identified on linkage group (LG) 7 of Fiesta in both progenies at the same genetic position. Four minor QTLs were also identified on LGs 3, 12 and 13. In addition, several significant digenic interactions were identified in both progenies. These results confirm the complex polygenic nature of resis- tance to fire blight in the progenies studied and also reveal the existence of a major QTL on LG7 that is stable in two distinct genetic backgrounds. This QTL could be a valuable target in marker-assisted selection to obtain new, fire blight-resistant apple cultivars and forms a starting point for discovering the function of the genes underlying such QTLs involved in fire blight control.
Databáze: OpenAIRE
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