บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Nature of wheat resistance to Fusarium head blight and the role of deoxynivalenol for breeding.

MESTERHAZY, A., BARTOK, T., MIROCHA, C.G. and KOMOROCZY, R.

Plant Breeding 118 : 97-110.

1999

บทคัดย่อ

Nature of wheat resistance to Fusarium head blight and the role of deoxynivalenol for breeding.

Wheat genotypes with different degrees of resistance and origins were tested with seven and eight isolates, respectively, of Fusarium graminearum and four Fusarium culmorum isolates of diverse origin in Europe.  Fusarium head blight (FHB) values, yield response and kernel infection values revealed close but varying relationships with DON content.  This variability is explained by the presence of tolerance mechanisms which affect the relationship between FHB severity and yield response.  Kernel infection resistance accounted for decreasing FHB values.  Genotypes were found with lower infection severity and higher DON contamination and vice versa.  However, in the most resistant genotypes showing no infection to any of the isolates or only sporadic symptom development, nil or very low accumulation of DON was detected.  Resistant genotypes gave a stable reaction with b-values close to zero for all trails tested.  Susceptible genotypes were unstable under different epidemic conditions and their stability was different for the traits investigated.  Therefore, the mean of b-values is suggested to better describe the stability of the wheat genotypes.