Disease infection is a major destructive concern in agricultural production, thus a common point of interest in breeding procedure. Evaluation of breeding improvement on plant disease resistance greatly reveals that high yielding selection in disease-free regions indirectly improves yield in diseased environments. Forty-five F1 hybrids and their 10 parents were assessed in 2016 and 2017 cropping season across five environments using 5 × 11 alpha lattice design to: (1) estimate the genetic variance components among tropical maize hybrids under NLB disease infection, and (2) study the genotypes’ agronomic performance and stability in NLB diseased environments. Data were recorded for major agronomic traits. Highly significant mean squares were recorded for environment, genotype and genotype × environment interaction for traits under study indicating distinctiveness of the test environments. Higher proportion of specific combining ability variance over general combining ability variance across test environments shows the predominance of dominance gene effects over additive gene for the inheritance of the traits under study. Significant and positive genetic correlations recorded for the test environments indicate that the hybrids reaction across the significant and positively correlated environments was consistently related signifying similar ranking of the hybrids for NLB disease resistance across test environments. Therefore, either of the test environments would be adequate for selecting NLB disease resistance germplasm. The most stable hybrids across test environments were all derived from resistance parental lines.

中文翻译：

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北方叶枯病感染下热带玉米基因型的遗传变异成分和GGE互作

疾病感染是农业生产中的主要破坏性问题，因此是育种过程中的一个共同点。育种改良对植物抗病性的评价极大地揭示了无病区的高产选择间接提高了病区的产量。在 2016 年和 2017 年的种植季节，使用 5 × 11 alpha 格子设计评估了 45 个 F1 杂种及其 10 个亲本，以：（1）估计 NLB 疾病感染下热带玉米杂种之间的遗传方差分量，以及（2）研究基因型在 NLB 患病环境中的农艺性能和稳定性。记录主要农艺性状的数据。记录了环境的高度显着的均方，所研究性状的基因型和基因型×环境相互作用表明测试环境的独特性。在整个测试环境中，特定配合力方差的比例高于一般配合力方差，这表明优势基因对所研究性状遗传的加性基因的影响占优势。为测试环境记录的显着和正遗传相关性表明，在显着和正相关环境中的杂种反应始终相关，表明杂种在测试环境中的 NLB 抗病性的类似排名。因此，任何一种测试环境都足以选择 NLB 抗病种质。