Genetic Variation for Resistance to Ear Rots and Mycotoxins Contamination in Early European Maize Inbred Lines
Genetic Variation for Resistance to Ear Rots and Mycotoxins Contamination in Early European Maize Inbred Lines
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DOI：
10.2135/cropsci2008.12.0701
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发表时间：
2009-11-01
期刊：
影响因子：
2.3
通讯作者：
Melchinger, A. E.
中科院分区：
文献类型：
--
作者：
Bolduan, C.;Miedaner, T.;Melchinger, A. E.
由镰刀菌引起的穗腐病是世界上许多玉米种植区的主要问题。我们的目标是(i)评估一组欧洲玉米自交系对穗腐病和霉菌毒素浓度的抗性，（ii）估计方差成分和遗传力，（iii）计算抗性性状之间的相关性。在人工接种条件下，对42个自交系在4种环境下对禾本科赤霉病的抗性进行了评价，对21个自交系在3种环境下对黄萎病赤霉病的抗性进行了评价。记录了赤霉素（AGER）和镰刀菌的严重程度以及脱氧雪腐镰刀菌醇（DON）、玉米赤霉烯酮和伏马毒素的积累情况。人工接种对赤霉病效果显著。基因型和基因型x环境互作差异普遍显著。遗传率估计为中等至高。疾病严重程度与真菌毒素浓度有很强的相关性。对真菌毒素，特别是AGER和DON的耐药选择预期具有良好的相关反应（r(p) = 0.94）。我们建议在目测评分的基础上进行初步选择，并对选定的精华材料进行霉菌毒素浓度评估。
Ear rots caused by Fusarium spp. are a major concern in many maize (Zea mays L.)-growing regions of the world. Our objectives were (i) to evaluate a set of European maize inbreds for resistance to ear rots and mycotoxin concentrations, (ii) to estimate variance components and heritabilities, and (iii) to compute correlations among resistance traits. Forty-two inbreds were evaluated for resistance to F. graminearum in four environments, and 21 inbreds were evaluated for resistance to F. verticillioides in three environments, under artificial inoculation. Data were recorded on severity of Gibberella (AGER) and Fusarium ear rots and accumulation of deoxynivalenol (DON), zearalenone, and fumonisins. Artificial inoculation was effective particularly for Gibberella ear rot. Genotypic and genotype x environment interaction variances were generally significant. Heritability estimates were moderate to high. Disease severity had strong correlations with respective mycotoxin concentrations. Selection for resistance is expected to have favorable correlated response for mycotoxins particularly with respect to AGER and DON (r(p) = 0.94). We recommend conducting initial selection on the basis of visual ratings and evaluate the selected elite material for mycotoxin concentrations.