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Stability of Hybrid Maize Reaction to Gibberella Ear Rot and Deoxynivalenol Contamination of Grain.
Phytopathology ( IF 2.6 ) Pub Date : 2020-11-06 , DOI: 10.1094/phyto-05-20-0194-r
F Dalla Lana 1 , P A Paul 1 , R Minyo 2 , P Thomison 2 , L V Madden 1
Affiliation  

Trials were conducted to quantify the stability (or lack of G × E interaction) of 15 maize hybrids to Gibberella ear rot (GER; caused by Fusarium graminearum) and deoxynivalenol (DON) contamination of grain across 30 Ohio environments (3 years × 10 locations). In each environment, one plot of each hybrid was planted and 10 ears per plot were inoculated via the silk channel. GER severity (proportion of ear area diseased) and DON contamination of grain (ppm) were quantified. Multiple rank-based methods, including Kendall’s concordance coefficient (W) and Piepho’s U, were used to quantify hybrid stability. The results found insufficient evidence to suggest crossover G × E interaction of ranks, with W greater than zero for GER (W = 0.28) and DON (W = 0.26), and U not statistically significant for either variable (P > 0.20). Linear mixed models (LMMs) were also used to quantify hybrid stability, accounting for crossover or noncrossover G × E interaction of transformed observed data. Based on information criteria and likelihood ratio tests for GER and DON response variables, the models with more complex variance-covariance structures—heterogeneous compound symmetry and factor-analytic—provided a better fit than the model with the simpler compound symmetry structure, indicating that one or more hybrids differed in stability. Overall, hybrids were stable based on rank-based methods, which indicated a lack of crossover G × E interaction, but the LMMs identified a few hybrids that were sensitive to environment. Resistant hybrids were generally more stable than susceptible hybrids.



中文翻译:

杂交玉米对赤霉菌穗腐病和谷物中脱氧雪腐酚污染的稳定性。

在30个俄亥俄州环境中(3年x 10个地点)进行了试验,以量化15种玉米杂种与赤霉素耳腐(GER;由镰孢镰刀菌引起)的稳定性(或缺乏G x E相互作用)和谷物的脱氧雪茄烯醇污染(DON)。 )。在每种环境中,每个杂交种都种植了一个地块,并通过丝通道接种了每个地块的10个耳朵。对GER严重程度(患病的耳朵区域的比例)和DON的谷物污染(ppm)进行了定量。包括肯德尔(Kendall)一致性系数(W)和Piepho's U在内的多种基于等级的方法用于量化混合稳定性。结果发现,没有足够的证据表明等级之间存在交叉G x E相互作用,GER(W = 0.28)和DON(W = 0.26)的W大于零,而两个变量的U均无统计学意义(P> 0.20)。线性混合模型(LMM)也用于量化混合稳定性,考虑了转换后的观测数据的交叉或非交叉G x E相互作用。基于信息标准和GER和DON反应变量的似然比检验,方差-协方差结构更复杂异构复合对称性和因子分析models的模型比具有简单复合对称性结构的模型具有更好的拟合度,表明或更多杂种的稳定性不同。总体而言,基于基于秩的方法,杂种是稳定的,这表明缺乏交叉G x E相互作用,但是LMM识别出一些对环境敏感的杂种。抗性杂种通常比易感杂种更稳定。解释转换后的观测数据的交叉或非交叉G x E相互作用。基于信息标准和GER和DON反应变量的似然比检验,方差-协方差结构更复杂异构复合对称性和因子分析models的模型比具有简单复合对称性结构的模型具有更好的拟合度,表明或更多杂种的稳定性不同。总体而言,基于基于秩的方法,杂种是稳定的,这表明缺乏交叉G x E相互作用,但是LMM识别出一些对环境敏感的杂种。抗性杂种通常比易感杂种更稳定。解释转换后的观测数据的交叉或非交叉G x E相互作用。根据信息标准和GER和DON反应变量的似然比检验,方差-协方差结构更复杂异构复合对称性和因子分析models的模型比具有简单复合对称性结构的模型具有更好的拟合度,表明或更多杂种的稳定性不同。总体而言,基于基于秩的方法,杂种是稳定的,这表明缺乏交叉G x E相互作用,但是LMM识别出一些对环境敏感的杂种。抗性杂种通常比易感杂种更稳定。具有更复杂的方差-协方差结构异构复合对称性和因子分析的模型比具有简单复合对称性结构的模型具有更好的拟合度,表明一个或多个杂种的稳定性存在差异。总体而言,基于基于秩的方法,杂种是稳定的,这表明缺乏交叉G x E相互作用,但是LMM识别出一些对环境敏感的杂种。抗性杂种通常比易感杂种更稳定。具有更复杂的方差-协方差结构异构复合对称性和因子分析的模型比具有简单复合对称性结构的模型具有更好的拟合度,表明一个或多个杂种的稳定性存在差异。总体而言,基于基于秩的方法,杂种是稳定的,这表明缺乏交叉G x E相互作用,但是LMM识别出一些对环境敏感的杂种。抗性杂种通常比易感杂种更稳定。这表明缺乏交叉G x E相互作用,但是LMM识别出一些对环境敏感的杂种。抗性杂种通常比易感杂种更稳定。这表明缺乏交叉G x E相互作用,但是LMM识别出一些对环境敏感的杂种。抗性杂种通常比易感杂种更稳定。
更新日期:2020-12-05
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