Fruitlet core rot of pineapple (&lt;i&gt;Ananas comosus&lt;/i&gt;) caused by &lt;i&gt;Fusarium ananatum&lt;/i&gt; in Japan

Yamashiro, Maki; Arasaki, Chiemi; Takushi, Tetsuya; Ooshiro, Atsushi; Ajitomi, Atsushi; Takeuchi, Makoto; Moromizato, Chie; Aoki, Takayuki

doi:10.3186/jjphytopath.85.25

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…In the cross, 'Yugafu' was used as a cross-parent with good fruit-eating quality, large fruit size, and high adaptability for the Okinawa climate. 'Yonekura' was used as a possible source of long shelf life, fruitlet core rot tolerance (Yamashiro et al 2019), and yellow flesh color. These cross-seedlings were planted in a pineapple selection field at OPARC-Nago at a density of 40,000 plants/ha, which is the normal planting density for commercial pineapple production in Okinawa.…”

Section: Methodsmentioning

confidence: 99%

Phenotypic Selection to Avoid Discarding Target Genotypes for Four Fruit Traits Based on Environmental Variances in a Pineapple Cross-seedling Population

Yamada,

Nashima,

Takeuchi

et al. 2024

horts

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Early ripening [earlier than 1 Aug during fruit harvest time (FHT)], large fruit weight (FW; >1000 g), high sugar content [>17% soluble solids content (SSC)], and low acidity in fruit juice (<0.7%) are important breeding targets of pineapple for table fresh fruit use in Japan. We investigated the efficiency of primary selection based on the four fruit traits using 129 first-fruiting F1 offspring population of ‘Yugafu’ × ‘Yonekura’ without replicates. Separately, environmental variances were estimated by an analysis of variance using evaluation data from 50 or 49 offspring in three replicates and two-year repeats. The phenotypic distribution in the 129 F1 population approached a normal distribution (P > 0.05). The genotypic distribution was obtained as a normal distribution with the population mean as the mean and genotypic variance obtained by subtracting the environmental variance from the phenotypic variance. The target genotypes were estimated at 14.4%, 58.7%, 5.0%, and 50.0% of the F1 population for FHT, FW, SSC, and acidity, respectively. Critical phenotypic values were established as the upper (FHT and acidity) and lower (FW and SSC) limits of the critical genotypic values at the 95% probability level. The phenotypic selection was made based on the critical phenotypic value, resulting in 45.0%, 88.4%, 27.1%, and 79.1% of the offspring selected for FHT, FW, SSC, and acidity, respectively, and 12.4% simultaneously for all four fruit traits. The results showed that the phenotypic primary selection reduced the population size to 12.4%, avoiding the discarding of target genotypes with a low risk. If breeders intend to further reduce the population size, then increasing the number of traits subject to primary selection would be effective.

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Section: Methodsmentioning

confidence: 99%

Phenotypic Selection to Avoid Discarding Target Genotypes for Four Fruit Traits Based on Environmental Variances in a Pineapple Cross-seedling Population

Yamada,

Nashima,

Takeuchi

et al. 2024

horts

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“…Recent studies in several regions have shown that FCR is caused by various fungal pathogens. For example, Talaromyces amestolkiae and Talaromyces stollii were found to cause FCR in Japan and Reunion Island (Vignassa et al 2021;Yamashiro et al 2019); Fusarium oxysporum, Fusarium proliferatum, and Fusarium sacchari were demonstrated to cause FCR in Reunion Island (Vignassa et al 2021); and Fusarium ananatum was identi ed as an FCR pathogen in China, Japan, Reunion Island, and South Africa (Gu et al 2015;Jacobs et al 2010;Vignassa et al 2021;Yamashiro et al 2019). Several other species in the genera Aspergillus, Clonostachys, Curvularia, Diaporthe, Epicoccum, Fusarium, Pestalotiopsis, Penicillium, Rhizopus, and Trichoderma have also been found in diseased fruitlets (Vignassa et al 2021).…”

Section: )mentioning

confidence: 99%

Rapid identification and characterization of pineapple fruitlet core rot pathogens on the ‘TN20’ cultivar in Taiwan

Liang,

Lin,

Lai

et al. 2023

Eur J Plant Pathol

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Fruitlet core rot (FCR) is a worldwide fungal disease of pineapple, which occasionally occurs on susceptible cultivars in Taiwan. This study describes the fungal pathogens of FCR and their occurrence in Taiwan for the rst time. A total of 51 fungal isolates were obtained from diseased fruitlets and blossom cups of 'TN20', a susceptible cultivar planted in Taiwan. These isolates were identi ed as the Talaromyces species T. amestolkiae, T. funiculosus, and T. stollii and Fusarium species F. ananatum, F. oxysporum, and F. annulatum based on phylogenetic analyses. All of them have been described as FCR pathogens in other countries, if considering that F. annulatum has often been misidenti ed as F. proliferatum. To facilitate identi cation, four pairs of species-speci c primers were developed, which enabled rapid identi cation of T. amestolkiae, T. funiculosus, and T. stollii by multiplex polymerase chain reaction (PCR) and F. ananatum by PCR. Two types of diseased fruitlets, "wet" and "dry", were observed on 'TN20', and T. amestolkiae, T. funiculosus, T. stollii, and F. ananatum could be isolated from both types. In addition, Talaromyces and Fusarium species were isolated from blossom cups at high frequencies, but few fungi were isolated from healthy tissues. The speci c primers designed in this study could provide a useful tool to study FCR in the future, and the ndings could provide a better understanding of the ecology and epidemiology of FCR.

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Rapid identification and characterization of pineapple fruitlet core rot pathogens on the ‘TN20’ cultivar in Taiwan

Liang

Lin

Lai

et al. 2023

Preprint

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Fruitlet core rot (FCR) is a worldwide fungal disease of pineapple, which occasionally occurs on susceptible cultivars in Taiwan. This study describes the fungal pathogens of FCR and their occurrence in Taiwan for the first time. A total of 51 fungal isolates were obtained from diseased fruitlets and blossom cups of ‘TN20’, a susceptible cultivar planted in Taiwan. These isolates were identified as the Talaromyces species T. amestolkiae, T. funiculosus, and T. stollii and Fusarium species F. ananatum, F. oxysporum, and F. annulatum based on phylogenetic analyses. All of them have been described as FCR pathogens in other countries, if considering that F. annulatum has often been misidentified as F. proliferatum. To facilitate identification, four pairs of species-specific primers were developed, which enabled rapid identification of T. amestolkiae, T. funiculosus, and T. stollii by multiplex polymerase chain reaction (PCR) and F. ananatum by PCR. Two types of diseased fruitlets, “wet” and “dry”, were observed on ‘TN20’, and T. amestolkiae, T. funiculosus, T. stollii, and F. ananatum could be isolated from both types. In addition, Talaromyces and Fusarium species were isolated from blossom cups at high frequencies, but few fungi were isolated from healthy tissues. The specific primers designed in this study could provide a useful tool to study FCR in the future, and the findings could provide a better understanding of the ecology and epidemiology of FCR.

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Fruitlet core rot of pineapple (<i>Ananas comosus</i>) caused by <i>Fusarium ananatum</i> in Japan

Cited by 5 publications

References 1 publication

Phenotypic Selection to Avoid Discarding Target Genotypes for Four Fruit Traits Based on Environmental Variances in a Pineapple Cross-seedling Population

Phenotypic Selection to Avoid Discarding Target Genotypes for Four Fruit Traits Based on Environmental Variances in a Pineapple Cross-seedling Population

Rapid identification and characterization of pineapple fruitlet core rot pathogens on the ‘TN20’ cultivar in Taiwan

Rapid identification and characterization of pineapple fruitlet core rot pathogens on the ‘TN20’ cultivar in Taiwan

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