tailieunhanh - Screening of wheat varieties for resistance to head scab caused by Fusarium graminearum schwabe

In this study, variability in pathogenicity among Fusarium graminearum isolates from different locations in Ohio was determined. The most virulent isolates from these locations were chosen and used in segregation studies to evaluate the resistance of some resistant by resistant winter wheat crosses to Fusarium head scab. | Turk J Agric For 25 (2001) 37-43 © TÜB‹TAK Screening of Wheat Varieties for Resistance to Head Scab Caused by Fusarium graminearum Schwabe Sibel DERV‹fi Mustafa Kemal Üniversitesi, Ziraat Fakültesi, Bitki Koruma Bölümü, 31043 Hatay - TÜRK‹YE Received: Abstract : In this study, variability in pathogenicity among Fusarium graminearum isolates from different locations in Ohio was determined. The most virulent isolates from these locations were chosen and used in segregation studies to evaluate the resistance of some resistant by resistant winter wheat crosses to Fusarium head scab. Differences in pathogenicity levels were significant among isolates even from the same location. Several generalizations can be made about the segregating generations in this study. The results indicated that Ning 7840 carries multiple genes for resistance. In addition, we found that Freedom and Ning 7840 have at least one resistance gene different. Although the level of resistance observed in the resistant by resistant cross appear to be adequate to protect the cultivar against head scab damage, higher levels of resistance would be useful in the future. As more resistant cultivars are identified, some popular but Fusarium scab suscebtible cultivars, may be replaced. Key Words: wheat varieties, Fusarium graminearum, head scab, resistance Fusarium graminearum Schwabe’un Neden Oldu¤u Baflak Uyuzuna Karfl› Dayan›kl› Bu¤day Varyetelerinin Belirlenmesi Özet : Bu çal›flmada Ohio’da çeflitli bölgelerden elde edilen Fusarium graminearum Schwabe izolatlar›n›n patojenisiteleri aras›ndaki farkl›l›klar saptand›. Bu izolatlardan en virulent olanlar seçildi ve baz› dayan›kl› X dayan›kl› k›fll›k bu¤day varyetelerinin Fusarium baflak uyuzuna karfl› dayan›kl›l›klar›n› de¤erlendirmek için yap›lan segregasyon çal›flmalar›nda kullan›ld›. Patojenisite düzeylerinde, ayn› bölgeden al›nan izolatlar aras›nda bile önemli derecede farkl›l›klar görüldü. Bu çal›flmada segregasyon yapan hatlar hakk›nda .

• Nông nghiệp
• Wheat varieties
• Fusarium graminearum
• Head scab
• Winter wheat crosses
• Wheat Triticum aestivum L
• Leaf rust
• Weather factors and wheat varieties
• Wheat varieties on the occurrence
• Leaf rust of wheat
• LR epiphytotic correlated
• Durum and soil fertility
• Response of wheat varieties
• Temperature situation
• Various phenophases of wheat crop
• Processing effect on phytase
• Selected Indian wheat varieties
• Grain breads are increased
• Phytase assay four wheat varieties
• Wheat native phytase
• Performance of wheat varieties
• Date of sowing in Southern Bihar
• Meteorological observatory
• Rice varieties
• Triticum aestivum L
• Various fertility levels
• Calcium phytate
• Indian wheat varieties
• Kinetic study of phytase
• Phytase in four Indian wheat varieties
• Enzyme kinetics study
• Seed vigour potential wheat
• Vigour parameter
• Different varieties of wheat
• Seed vigour potentia
• Vigour parameters of different varieties
• Seed rate
• Wheat and economics
• Yield attributes
• Yield of different varieties
• Late sowing
• Very late sowing
• Very late sowing conditions
• Zakladnoi and retanova
• Predominant insect pest
• Different wheat varieties against
• Varieties against rice weevil
• Their management
• Nitrogen management practices
• Productivity of late sown wheat
• Buck wheat varieties
• Buckwheat varieties
• Northern parts of west Bengal
• Response of buckwheat varieties
• Bread wheat
• Yield potential
• Genetic variability
• Principal components
• Identify potential varieties of bread wheat
• CRI stage
• Boot leaf stage
• B:C ratio
• Yield attributes of different wheat
• Sulphur nutrient
• IW/CPE ratio
• Moisture regimes on growth
• Productivity of wheat
• Soil nutrients
• Residual soil nutrients
• Influence of varieties
• Herbicide mixtures
• Wheat based cropping system
• Bio organic
• Kymore plateau
• Satpura hill zone
• Vio organic preparations
• Sugarcane ratoon wheat (S R W) system
• Early maturing sugarcane varieties
• Fertility levels
• Recommended dose of fertilizer (RDF)
• Commercial cane sugar
• Millable canes
• Zn application
• Rice and wheat varieties
• Varying Zn sensitivity
• Rhizosphere acidification in rice
• Zn application on rhizosphere acidification
• Proline content
• Suitable mitigation strategy
• Counter the adverse effect
• Zinc application
• Zinc use efficiencies
• Varieties and levels of nitrogen
• Levels of nitrogen on growth functions
• Nitrogen on growth functions
• Growth functions of wheat
• Growth functions
• Nitrogen use efficiency
• Rainfed conditions
• Relation to nitrogen levels
• Performance in different years
• Water requirement
• Water applied and WUE
• Different number of irrigations
• Determination of water requirement