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Evaluation of Susceptibility of Apricot Cultivars to Foveavirus latensarmeniacae Using Biological Indexing and RT-PCR
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Evaluation of Susceptibility of Apricot Cultivars to Foveavirus latensarmeniacae Using Biological Indexing and RT-PCR
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Evaluation of Susceptibility of Apricot Cultivars to Foveavirus latensarmeniacae Using Biological Indexing and RT-PCR
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Journal Article
Evaluation of Susceptibility of Apricot Cultivars to Foveavirus latensarmeniacae Using Biological Indexing and RT-PCR
2026
Overview
A two-year experimental study was carried out to investigate the susceptibility of apricot (Prunus armeniaca L.) cultivars and hybrids to Foveavirus latensarmeniacae (Apricot latent virus, ApLV) using biological indexing and RT-PCR diagnostics. In total, 19 different genotypes were analyzed in this study. Inoculated plants developed symptoms on the young sprouting apricot leaves, including chlorotic spots, leaf wrinkling, necrosis, and stunting, most prominently expressed in the first year of cultivation. In the four following evaluation periods (May 2024, July 2024, May 2025, July 2025), symptom expression slightly decreased, while plant mortality increased considerably, the percentage of plant mortality was 35.1%. Significant correlations (p < 0.05) in symptom manifestation between GF-305 indicator and apricot hybrids were observed only in the second evaluation period (July 2024; r = 0.5882), while the most pronounced symptoms on apricots occurred in the first period. ANOVA revealed a significant relationship between symptom expression and virus presence in apricot plants in the first and third periods, whereas GF-305 symptoms correlated with ApLV detection in all periods. Principal component analysis (PCA) further highlighted the relationship between GF-305 symptoms and the number of infected plants, while symptom expression on apricot genotypes was less consistently correlated with RT-PCR diagnostic results. Cluster analysis separated the studied material into two groups, with LE-3246, LEM/2017/18, LEM/2017/20, ‘Orangered’ and ‘Harlayne’ showing indications of a comparatively lower susceptibility to ApLV. These results provide insights into the interaction between ApLV and apricot genotypes. The findings also suggest that ApLV may not be entirely latent under certain conditions, as severe symptoms were observed in several apricot cultivars in this study.
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