Effect of polyploidisation on the response of apple (Malus × domestica Borkh.) to Venturia inaequalis infection

Development of new and durable strategies to improve the apple plant’s resistance against apple scab ( Venturia inaequalis ) remains a major challenge. Polyploids or organisms with three or more complete chromosome sets often possess properties superior to their diploid counterparts. Studies reporte...

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Bibliographic Details
Published inEuropean journal of plant pathology Vol. 151; no. 2; pp. 515 - 526
Main Authors Hias, Niek, Svara, Anze, Keulemans, Johan Wannes
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.06.2018
Springer Nature B.V
Subjects
Abiotic factors
Agriculture
Apples
Biomedical and Life Sciences
Deoxyribonucleic acid
Disease resistance
DNA
Ecology
Fruits
Genomes
Genotypes
Life Sciences
Malus domestica
Plant Pathology
Plant Sciences
Ploidy
Polyploidy
Scab
Venturia inaequalis
Resistance
Polyploidy
Apple scab
Non-model fruit crop
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Summary:Development of new and durable strategies to improve the apple plant’s resistance against apple scab ( Venturia inaequalis ) remains a major challenge. Polyploids or organisms with three or more complete chromosome sets often possess properties superior to their diploid counterparts. Studies reported that polyploidy confers an increased resistance to biotic and abiotic stress factors. However, the potential use of polyploidy to increase disease resistance is still insufficiently investigated. We determined the influence of artificial genome doubling on the response of three Malus × domestica genotypes, with a variable level of susceptibility to apple scab. Based on visual symptom evaluation and real-time PCR quantification of the V. inaequalis DNA in apple leaves, an increased resistance was observed in the neotetraploid form of the monogenic resistant genotype compared to its diploid progenitor. No pronounced effects were observed comparing ploidy levels of the susceptible genotypes. These results suggest a potential role for polyploidisation in apple scab resistance, but it seems to depend on the degree of disease susceptibility of the genotype. Still, further research on the effects of polyploidy might offer potential in the development of new and durable resistance strategies.
ISSN:0929-1873
1573-8469
DOI:10.1007/s10658-017-1395-2