Identifying pathogenicity genes inFusarium oxysporumf. sp.cubense

Czislowski, Elizabeth; Fraser-Smith, S.; Zander, Manuel; Aitken, E. A. B.

doi:10.17660/actahortic.2016.1114.14

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…The data suggest that chromosome 14 of lineage-specific genomic regions (LS) harbors genes responsible for pathogenicity that are dispensable and can be transferred laterally between pathogens, including several polyphyletic clonal lines within the species complex [42] (although, to date, there is no published evidence that chromosome 14 exists in Foc). Recent studies indicate that many genes are required for general pathogenicity in relation to plants, and they are widely distributed throughout the F. oxysporum species complex, but the specific pathogenicity of the Foc host can be attributed to fungal effectors such as SIX genes [25,45,46]. Furthermore, a study has stated that the presence of the SIX1a allele is linked to the virulence of Foc 'TR4' in bananas from the Cavendish subgroup based on mutagenesis analyses [47].…”

Section: Discussionmentioning

confidence: 99%

Evidence of Correlation between Pathogenicity, Avirulence Genes, and Aggressiveness of Fusarium oxysporum f. sp. cubense in Banana “Cavendish” and “Prata” Subgroups

Velame,

Rocha,

Ferreira

et al. 2024

Horticulturae

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Fusarium wilt caused by Fusarium oxysporum f. sp. cubense (Foc) is one of the most destructive diseases in banana farming worldwide. Knowledge of the factors of genetic diversity and virulence of the pathogen contributes to the development of resistant cultivars and management strategies based on exclusion. In this study, phenotypic traits such as virulence and aggressiveness in a sample of 52 Foc isolates were analyzed and their relationship to the presence of putative effectors of gene SIX (Secreted in Xylem) pathogenicity homologs was verified. The similarity matrix revealed three isolates that were closest to the standard Foc race 1 strain. Isolates 229A and 218A were selected according to their aggressiveness profile in ‘Grand Naine’ and ‘Prata-Anã’, respectively, to replace the standard isolate of race 1 in the resistance screening process carried out by the breeding program. Two homologs of the SIX8 gene, SIX8a and SIX8b, are present in isolates of Foc from Brazil, and the SIX8b gene correlates with avirulence in the cultivar ‘Grand Naine’ (Cavendish). These results are important to support the banana genetic breeding program by identifying sources of resistance to Foc and contributing to the establishment of the function of SIX effector proteins.

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Section: Discussionmentioning

confidence: 99%

Evidence of Correlation between Pathogenicity, Avirulence Genes, and Aggressiveness of Fusarium oxysporum f. sp. cubense in Banana “Cavendish” and “Prata” Subgroups

Velame,

Rocha,

Ferreira

et al. 2024

Horticulturae

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show abstract

Evidence of Correlation between Pathogenicity, Avirulence Genes and Aggressiveness of Fusarium oxysporum f. sp. cubense in Banana “Cavendish” and “Prata” Subgroups

Velame,

Pestana,

Rocha

et al. 2024

Preprint

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Fusarium wilt caused by Fusarium oxysporum f. sp. cubense (Foc) is one of the most destructive diseases in banana farming worldwide. Knowledge of the factors of genetic diversity and virulence of the pathogen contributes to the development of resistant cultivars and in management strategies based on exclusion. In this study, phenotypic traits such as virulence and aggressiveness in a sample of 52 Foc isolates, were analyzed and their relationship to the presence of putative effectors of gene SIX (Secreted in Xylem) pathogenicity homologues, verified. According to the dissimilarity matrix, there were three isolates closest to the standard Foc race 1 strain. Isolates 229A and 218A, were selected according to their aggressiveness profile in 'Grand Naine' and 'Prata-Anã', respectively, I order to replace the standard isolate of race 1 in the resistance screening process carried out by the breeding program. Two homologues of the SIX8 gene, SIX8a and SIX8b, are present in isolates of Foc from Brazil and the SIX8b gene correlates with avirulence in the cultivar ‘Grand Naine’ (Cavendish). These results are important to support the banana genetic breeding program by identification of sources of resistance to Foc and contribute in the establishment of the function of SIX effector proteins.

show abstract

Identifying pathogenicity genes inFusarium oxysporumf. sp.cubense

Cited by 2 publications

References 17 publications

Evidence of Correlation between Pathogenicity, Avirulence Genes, and Aggressiveness of Fusarium oxysporum f. sp. cubense in Banana “Cavendish” and “Prata” Subgroups

Evidence of Correlation between Pathogenicity, Avirulence Genes, and Aggressiveness of Fusarium oxysporum f. sp. cubense in Banana “Cavendish” and “Prata” Subgroups

Evidence of Correlation between Pathogenicity, Avirulence Genes and Aggressiveness of<em> Fusarium oxysporum</em> f. sp. <em>cubense</em> in Banana “Cavendish” and “Prata” Subgroups

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