Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

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

Karinna V C Velame
,
Katia Nogueira Pestana
* ,
Anelita de Jesus Rocha
ORCID logo ,
Mileide dos Santos Ferreira
ORCID logo ,
Fernando Haddad
ORCID logo ,
Vanusia B. Oliveira Amorim
,
Claudia Forttes Ferreira
ORCID logo ,
Saulo Alves Santos de Oliveira
ORCID logo ,
Edson Perito Amorim
* ORCID logo
Version 1 : Received: 26 January 2024 / Approved: 26 January 2024 / Online: 29 January 2024 (07:05:49 CET)

A peer-reviewed article of this Preprint also exists.

Velame, K.V.C.; Rocha, A.J.; Ferreira, M.S.; Haddad, F.; Amorim, V.B.O.; Pestana, K.N.; Ferreira, C.F.; Alves Santos de Oliveira, S.; Amorim, E.P. Evidence of Correlation between Pathogenicity, Avirulence Genes, and Aggressiveness of Fusarium oxysporum f. sp. cubense in Banana “Cavendish” and “Prata” Subgroups. Horticulturae 2024, 10, 228. Velame, K.V.C.; Rocha, A.J.; Ferreira, M.S.; Haddad, F.; Amorim, V.B.O.; Pestana, K.N.; Ferreira, C.F.; Alves Santos de Oliveira, S.; Amorim, E.P. Evidence of Correlation between Pathogenicity, Avirulence Genes, and Aggressiveness of Fusarium oxysporum f. sp. cubense in Banana “Cavendish” and “Prata” Subgroups. Horticulturae 2024, 10, 228.

Abstract

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.

Keywords

Musa spp.; resistance; Fusarium wilt; effectors

Subject

Biology and Life Sciences, Agricultural Science and Agronomy

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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