3rd International Symposium On Fusarium Head Blight, Session 6: Taxonomy, Populations Genetics and Genomics of Fusarium spp. Poster presentations

Fusarium head blight (FHB) or head Scab is a very devastating fungal disease of wheat. Epidemics results with severe yield losses and overall seed quality reduction due to mycotoxins contaminated grains. Several species of Fusarium are found associated with the disease. But, incidence and severity of FHB and the composition of Fusarium species involved are reported to vary among geographical regions and years due to variations in climatic condi-tions and cropping practices. Climatic conditions, and even local variations in weather, can limit the range of species observed even if several are present, and influence their relative frequency of recovery. Our present study gives an idea about the distribution dynamics of FHB causing Fusarium spp. at three different locations in India. Most of the species can be found in much of geographical area affected but individual species dominate a specific re-gion. Analysis of the results of present study indicated that three Fusarium spp. i.e. F. graminearum, F. pallidoroseum and F. oxysporum were found as-sociated with FHB but F. graminearum was the dominant in all the location surveyed. Other two species are also associated with the disease but fre-quency was low. As these geographical locations represent different climatic conditions, the high relative distribution frequency of F. graminearum indi-cates its better adaptability to variable environmental conditions. Under-standing the pathogen distribution dynamics may also provide insights into the epidemiology and evolutionary potential of Fusarium spp. and could lead to improved management strategies under present climate change scenario.

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Reaction to Fusarium Head Blight (FHB) of Six New Wheat Cultivars Widely Grown in Transylvania

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Agriculture ◽

10.15835/buasvmcn-agr:3980 ◽

1970 ◽

Vol 66 (1) ◽

Author(s):

Sardar AMIN ◽

Marin ARDELEAN ◽

Vasile MOLDOVAN ◽

Rodica CADAR

Keyword(s):

Grain Yield ◽

Fusarium Head Blight ◽

Wheat Cultivars ◽

Head Blight ◽

Fusarium Spp ◽

Developmental Progress ◽

Progress Curve ◽

Symptom Intensity ◽

Winter Wheat Cultivars ◽

Artificial Inoculations

Fusarium head blight (FHB), caused by Fusarium spp., has become one of the most destructive diseases in the world’s wheat growing areas , especially in the humid and semihumid regions (Paillard et al. 2004, Mesterhazy 1978, Stack & Mullen 1985; Kiecana 1987; Kiecana et al. 1988). Six winter wheat cultivars, recently released and widely grown in Trasylvania, have been evaluated for FHB resistance during 2006. The evaluation was made by means of artificial inoculations with Fusarium graminearum and assesment of symptom intensity by computing AUDPC index (Area Under Developmental Progress Curve). Based on these data, two cultivars (Dumbrava and Turda 195) were considered as resistant, two cultivars (Ardeal and Arieşan) as medium resistant and other two cultivars (Fundulea 4 and GK Öthalom) as susceptible to FHB. The reaction to FHB of the six tested cultivars, based on the postharvest indices, showed significant differences among these cultivars as far as the yield elements and the total grain yield were considered. Actually, in the resistant cultivars, both the total grain yield and some of the yield elements (spike wight, grain weght/spike and 1000 kernel weigt) were significantly less affected by FHB than in medium resistant and susceptible cultivars.

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