MAIZE INBREED LINES RESISTANCE TO FUSARIUM EAR ROT Branimir Šimić - The Agricultural Institute Osijek, 31 000 Osijek, CROATIA Jasenka Ćosić - Vlatka Rozman - Anita Liška University of J.J. Strossmayer in Osijek, Faculty of Agriculture in Osijek, CROATIA
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MAIZE INBREED LINES RESISTANCE TO FUSARIUM EAR ROT Branimir Šimić - The Agricultural Institute Osijek, 31 000 Osijek, CROATIA Jasenka Ćosić - Vlatka Rozman.
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MAIZE INBREED LINES RESISTANCE TO FUSARIUM EAR
ROT
Branimir Šimić - The Agricultural Institute Osijek,31 000 Osijek, CROATIA
Jasenka Ćosić - Vlatka Rozman - Anita Liška University of J.J. Strossmayer in Osijek,
Faculty of Agriculture in Osijek, CROATIA
Introduction
• Vital importance of maize as agricultural crop and market competitiveness among hybrids seed breeders set up high standards in new genotypes creation
• New maize hybrids - high genetic potential for fertility and resistance to the major disease agents and pests
• Fusarium ear rot is one of the most important diseases in all the major
maize breeding areas in the world
• Maize ear infection results in lower maize yield, and poorer quality and accumulation of mycotoxins in grain - risk for human and animal health
• Most frequent isolated Fusarium species on maize grain: Fusarium verticillioidesF. subglutinans andF. graminearum
• Ways of spreading maize ear infection:
silkear stalkdamage made by insects
• Infection, development and intensity of disease are influenced by environmental factors, genotype sensitivity and resistance, and pathogenesis of Fusarium spp. and their mutual interaction
• Stress in the period of vegetation affects plant’s vigour - disorders in physiological processes and increase sensitivity to the agents of the disease
Objective of the study:• determine differences in sensitivity and
resistance of inbreed maize lines grown on two different soil types to Fusarium ear rot
Materials and Methods
• Six inbreed maize lines of FAO 400 and one line of FAO 300 (OS 138-9)• Two locations and two soil types (Kutjevo; pseudogley and Nova
Gradiška; amphigley)• 3-year trial (2001-2003)• Four repetitions following split-plot method
(major plot measured 300m2 ; (15x20m)• Standard fertilization was made:
Urea 200 kg NPK (7:20:30) 200 kg m-2 (ploughed in) KAN 150 kg m-2 in nutrition while cultivating
• 120 plants of each genotype were examined measuring intensity of infection in percentage of maize ear infection
• Results were processed by Statistica for Windows v. 6.0• Significant differences among the treatments were determined by
ANOVA and LSD test
Results and Discussion
Table 1 Percentage of maize ears infected with Fusarium spp. regarding locations and years (%)