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SESSION 4: GENETICS OF HOSTS – PLANT RESISTANCE TO FUSARIUM, VARIETY DEVELOPMENT P80 - Breeding resistance for Fusarium head blight in supporting higher efficiency of the integrated plant management in wheat Á. Mesterházy, S. Lehoczki-Krsjak, M. Varga, Á. Szabó-Hevér and B. Tóth, P. Nicholson and M. Lemmens Cereal Research Ltd., Alsókikötősor 9, H-6726, Szeged, Hungary E-mail: akos.mesterhazyabonakutato.hu The experience shows that the breeding of more resistant wheat genotypes is a slow process in spite of the efforts done. The genetic background is complicated; the additive effect of different QTLs is seldom expressed, sometimes different gene combinations might be more susceptible. Most of the QTLs determine FHB reaction, some other only FHB or DON, but only a few influences all. Most of the QTLs are of low or medium effect and many of them cannot be validated. Often they determine traits that influence disease development, but have nothing common with physiological resistances Type I-V. The strong selection for Type II resistance was less effective than thought because fhb1 major QTL determines only 30-40 % os the resistance, the other part is coming from other Type I and Type II QTLs. For this reason a change is now under way to use spraying inoculation more for selection than single floret inoculation. Within the native or local wheat programs many lines and genotypes were found with higher resistance to FHB and their use is more expanded as was before. The high resistance level Asiatic sources resulted in higher resistant plants, but seldom varieties, because the bad agronomy form is hard to correct during the breeding. In the Szeged breeding program several of this type have very high resistance level with acceptable agronomy background. At present the native originated varieties from Szeged give an increasing acreage in Hungary, the leading cultivar is Csillag, but others like Fény, Körös, Berény, and Rozi are also in increasing. The fungicide trials showed that these cultivars in epidemic conditions showed moderate symptoms and combined with fungicide treatment with better technology, also under epidemic conditions the low DON contamination can be secured (below the EU limit 1.25 ppm DON). Acknowledgements: The authors express their thanks for financial support to projects FP7 MycoRed KBBE-2007-2-5-05, contract No. 222690, and GAK (OMFB-00313/2006 ). Keywords: resistance, breeding strategies, DON, QTL, Integrated plant management 173
SESSION 4: GENETICS OF HOSTS – PLANT RESISTANCE TO FUSARIUM, VARIETY DEVELOPMENT P81 - Breeding of cereal cultivars resistant to Fusarium fungi T. Kolomiets, L. Pankratova, E. Kovalenko All-Russian Research Institute of Phytopathology, Moscow Region, Odintsovo district, str. Institute, b.5, VNIIF, Moscw, Russia E-mail: lomi1@yandex.ru Breeding of cereal cultivars resistant to Fusarium fungi causing fusarium head blight, root rot and snow mold is the important problem all over the world, including Russia. Genetic diversity of world gene accessions was studied for selection of breeding sources resistant to Fusarium fungi. Ecological and genetic differentiation of species of host plant was taken into account. Total of 5000 wheat cultivars from different genetic groups was screened with identification of different types and rates of disease severity of root rot and snow mold. There was 6,7% resistant lines from winter accession of bread wheat (T. aestivum), 8,8% - from spring accessions of bread wheat, 1,4% - from spring accessions of durum wheat (T. durum) selected by screening to resistance. The high resistance was shown for Triticale lines. The samples from Aegilops aucheri, Ae.ovata, Ae.columnaris, Ae.triuncialis, Ae.koteshyi species were resistant to fusarium diseases. Distribution of resistant wheat lines dependent on their geographical origin. Winter wheat cultivars with moderate resistance to fusarium root rot were dominated in Western Europe (Icsu – France, Horpacsi – Hungry, Yasen – Bulgaria etc.) and in North America (Chiefkan, Archamp, Benni, Coker 9227 – USA etc.). Resistant spring bred wheat cultivars were revealed within 8 ecological-geographical groups presented majority of countries. The focus of interest was on accessions introduced from North and South America, India, as well as international and regional nurseries (Laura - Canada, Achut - Nepal, Vectis - USA, BVF-2 - Mexico etc.). Durum wheat cultivars with moderate resistance were dominated in the Mediterranean regions and in the southwesten Asia (Aya de Carvo - Portugal, 80/57 – Italy, Ak-bugda - Dagestan, k.6397 - Georgia, k.6397, k. 36269 - Armenia). The origin of wheat cultivars with high resistance to snow mold was West Europe (Glockner, Agent, Aron - Germany, Szemes - Hungary, Turda 81 - Rumania, Sol IV - Sweden). Keywords: Fusarium, wheat, cultivars, breeding 174
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Bordeaux EFS12 12 th European Fusar
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TABLE OF CONTENTS Welcome from the
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4 SPONSORSHIP The 12 th European Fu
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8 13:00 - 14:00 Lunch 14:00 - 15:00
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10 Session 4: Genetics of Hosts - P
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12 Thursday, May 16 th Session 6: F
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Evidence for birth-and-death evolut
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Future challenges of Fusarium and m
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P35 - Screening deoxynivalenol in o
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P76 - Fusarium verticillioides and
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P113 - Agronomic practices and risk
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ORAL PRESENTATIONS 25
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KEYNOTE LECTURE SESSION 1: FUSARIUM
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SESSION 1: FUSARIUM - GENETICS, GEN
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KEYNOTE LECTURE SESSION 2: SECONDAR
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SESSION 2: SECONDARY METABOLITES -
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SESSION 3: PATHOGENESIS - EPIDEMIOL
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KEYNOTE LECTURE 1 SESSION 4: GENETI
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SESSION 4: GENETICS OF HOSTS - PLAN
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KEYNOTE LECTURE 2 SESSION 4: GENETI
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KEYNOTE LECTURE SESSION 5: DISEASE
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SESSION 5: DISEASE CONTROL AND FORE
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SESSION 6: FUTURE CHALLENGE FOR EUR
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POSTER PRESENTATIONS 91
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de Hoog G. S., 89, 114, 236 de Kler
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Ponts N., 33, 36, 82, 94, 104, 106,
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242
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BOKU-University of Natural Resource
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touatisihem03@yahoo.fr He Xinyao In
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steve.oliver@bioc.cam.ac. uk Ortega
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Subramaniam Gopal Agriculture and A
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