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- Title
Susceptibility Evaluation to Fire Blight and Genome-Wide Associations within a Collection of Asturian Apple Accessions.
- Authors
García-Fernández, Belén; Dolcet-Sanjuan, Ramon; Micheletti, Diego; Antón-Díaz, María José; Solsona, Cristina; Fernández, Mercedes; Abad, Xavier; Dapena, Enrique
- Abstract
Fire blight, caused by Erwinia amylovora, is one of the most devastating apple diseases. The selection of cultivars of low susceptibility and the study of the genetic mechanisms of the disease play important roles in fire blight management. The susceptibility level to fire blight was evaluated in 102 accessions originating from Asturias, a cider-producing region located in the north of Spain with a wide apple germplasm. Evaluations took place under quarantine conditions using artificial inoculations of grafted plants. The results revealed wide variation in susceptibility responses and low-susceptible cultivars were identified. In addition, 91 cultivars were genotyped using the Affymetrix Axiom® Apple 480 K SNP array to conduct genome-wide association studies (GWAS). A statistically significant signal was detected on chromosome 10 using the multi-locus mixed model (MLMM). Two genes were identified as major putative candidate genes: a TIR-NBS-LRR class disease protein and a protein containing a development and cell death (DCD) domain. The outcomes of this study provide a promising source of information, particularly in the context of cider apples, and set a starting point for future genetic and breeding approaches.
- Subjects
ASTURIAS (Spain); SPAIN; GENOME-wide association studies; ERWINIA amylovora; APPLE cider; FIRE management; PLANT inoculation; APPLES; BLIGHT diseases (Botany)
- Publication
Plants (2223-7747), 2023, Vol 12, Issue 23, p4068
- ISSN
2223-7747
- Publication type
Article
- DOI
10.3390/plants12234068