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    Occurrence of passion fruit woodiness disease in the coastal lowlands of Kenya and screening of passion fruit genotypes for resistance to passion fruit woodiness disease

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    Date
    2023
    Author
    Asande, Lydia K
    Ombori, Omwoyo
    Oduor, Richard O
    Nchore, Shem B
    Nyaboga, Evans N
    Type
    Article
    Language
    en
    Metadata
    Show full item record

    Abstract
    Background: Passion fruit (Passiflora edulis [Sims]) is an important economic fruit crop in Kenya, grown for domestic, regional and international markets. However, passion fruit production is constrained by both biotic and abiotic stresses. Passion fruit woodiness disease (PWD) complex is the most injurious viral disease responsible for yield losses of up to 100%. In East Africa, it is caused by potyviruses. The most effective way to manage PWD is by using resistant cultivars. The objectives of this study were to determine the occurrence of passion fruit woodiness disease in selected counties at the Coastal lowlands of Kenya and screen farmer preferred passion fruit genotypes for resistance to PWD. Results: In the present study, it was established that all surveyed farms in Kwale and Kilifi counties displayed passion fruit woodiness virus disease symptoms. The highest disease incidence of 59.16% and 51.43% was observed at Kilifi and Kwale counties, respectively. A significant difference (p < 0.05) in symptom severity was observed within the tested genotypes with purple and banana passion fruits having the highest and lowest AUDPC values, respectively, both under greenhouse and field conditions. ACP ELISA assays using universal potyvirus antiserum (Agdia Inc., Elkhat, IN) confirmed that the observed characteristic symptoms of woodiness disease were as a result of potyvirus infection. Conclusions: The findings herein indicate that PWD is widespread in both Kilifi and Kwale counties with low to moderate disease incidence and severity. The observed prevalence, incidence and severity levels of PWD in Kwale and Kilifi counties could be aggravated by poor management practices such as non-sterilization of pruning tools, intercropping with target crops and crop rotation with the same target crops. Response of passion fruit genotypes to woodiness viruses was genotype dependent. There is need to sensitize farmers on the cause and spread of PWD and management strategies in order to increase production and enhance the quality of fruits.
    URI
    https://pubmed.ncbi.nlm.nih.gov/37932686/
    http://erepository.uonbi.ac.ke/handle/11295/163934
    Citation
    Asande LK, Ombori O, Oduor RO, Nchore SB, Nyaboga EN. Occurrence of passion fruit woodiness disease in the coastal lowlands of Kenya and screening of passion fruit genotypes for resistance to passion fruit woodiness disease. BMC Plant Biol. 2023 Nov 6;23(1):544. doi: 10.1186/s12870-023-04546-8. PMID: 37932686; PMCID: PMC10626802.
    Publisher
    University of Nairobi
    Subject
    Disease resistance; Passiflora; Passion fruit woodiness disease; Viruses.
    Collections
    • Faculty of Health Sciences (FHS) [10415]

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