Molecular identification of formae specialis and racial identity in Iranian strains of Fusarium oxysporum f. sp. lycopersici: detection of avirulence genes

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RABIEI MOTLAGH ELAHE; ROUHANI HAMID; SHOKOUHIFAR FARHAD; FALAHATI RASTEGAR MAHROKH; Taher Parissa

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Journal: JOURNAL OF CROP PROTECTION Year:2017 | Volume:6 | Issue:1 Page(s): 67-77

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Title

Molecular identification of formae specialis and racial identity in Iranian strains of Fusarium oxysporum f. sp. lycopersici: detection of avirulence genes

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Keywords

Avirulence genotypeQ1

effector geneQ1

tomato wiltQ1

molecular detectionQ1

Abstract

Fusarium oxysporum f. sp. lycopersici (Fol) is the causal agent of vascular wilt in tomato, an important plant disease in Iran. Four monogenic resistance genes in tomato are used for identification of races of Fol and their corresponding avirulence genes Avr1, Avr2 and Avr3 were identified in pathogen one of which, Avr2, is f. sp. specific. Hence they can serve as reliable markers for racial identity and f. sp discrimination. These markers have been used for strains from other countries except Iran. Furthermore, a point mutation in Avr3 can lead to enhanced virulence of Fol on a susceptible tomato cultivar. To identify forma specialis and racial identity, Avr genes were studied in a collection of Iranian strains. Results revealed that PCR assay is very efficient in distinguishing between non-pathogenic and low virulence strains and in the vast majority of strains, Avirulence genotype was consistent with Fol race1. Furthermore, to determine whether allelic variation of Avr3 could separate strains of different degrees of virulence, Avr3 was sequenced in Fol strains with high and low virulence. The results revealed that allelic variation of Avr3 was not correlated with degree of virulence in Iranian strains.

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APA: Copy

RABIEI MOTLAGH, ELAHE, ROUHANI, HAMID, SHOKOUHIFAR, FARHAD, FALAHATI RASTEGAR, MAHROKH, & Taher, Parissa. (2017). Molecular identification of formae specialis and racial identity in Iranian strains of Fusarium oxysporum f. sp. lycopersici: detection of avirulence genes. JOURNAL OF CROP PROTECTION, 6(1 ), 67-77. SID. https://sid.ir/paper/239057/en

Vancouver: Copy

RABIEI MOTLAGH ELAHE, ROUHANI HAMID, SHOKOUHIFAR FARHAD, FALAHATI RASTEGAR MAHROKH, Taher Parissa. Molecular identification of formae specialis and racial identity in Iranian strains of Fusarium oxysporum f. sp. lycopersici: detection of avirulence genes. JOURNAL OF CROP PROTECTION[Internet]. 2017;6(1 ):67-77. Available from: https://sid.ir/paper/239057/en

IEEE: Copy

ELAHE RABIEI MOTLAGH, HAMID ROUHANI, FARHAD SHOKOUHIFAR, MAHROKH FALAHATI RASTEGAR, and Parissa Taher, “Molecular identification of formae specialis and racial identity in Iranian strains of Fusarium oxysporum f. sp. lycopersici: detection of avirulence genes,” JOURNAL OF CROP PROTECTION, vol. 6, no. 1 , pp. 67–77, 2017, [Online]. Available: https://sid.ir/paper/239057/en

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