The value of selection in conventional breeding trials of cultivars destined for organic systems depends on the correlation between systems and relative heritability of key traits. Genotype × environment interaction is a common phenomenon in plant breeding trials. Thus, multiple-environment testing to identify stable genotypes is a high priority for organic systems. In addition, because organic systems have limited inputs to buffer the environment, they may have greater spatial heterogeneity, which may be better accounted for by additional spatial blocking terms beyond traditional randomized complete-block design. Over 2 yr, we evaluated 100 hybrid and 40 inbred sweet corn (Zea mays L.) genotypes in 11 trials in organic systems across six locations and evaluated the addition of augmented incomplete block and row–column design to estimate the performance of sweet corn genotypes. Hybrids differed in their performance for all tested traits. Inbred parents differed in per se performance and general combining ability for all traits. For the hybrid entries, modeling spatial factors beyond the replicated complete blocks improved the model fit for days to anthesis, plant height, ear height, husk protection, ear width, and ear length. For inbred entries, modeling spatial factors beyond the replicated complete blocks improved ∖ model fit for plant height, ear height, tenderness, and ear width. Wricke's ecovalence (W²_i) was a useful measure of stability, correlating reasonably well with two of the three stability statistics considered in this analysis. Based on Wricke's ecovalence, some inbred parents were more stable than others across tested environments in their combining ability for all traits.

中文翻译：

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近交和杂交甜玉米基因型在不同有机环境中的表现

在常规育种试验中选择用于有机系统的品种的价值取决于系统之间的相关性和关键性状的相对遗传力。基因型×环境相互作用是植物育种试验中的普遍现象。因此，识别稳定基因型的多环境测试是有机系统的重中之重。此外，由于有机系统用于缓冲环境的输入有限，因此它们可能具有更大的空间异质性，这可能可以通过传统随机完整块设计之外的额外空间块项来更好地解释。2 年多来，我们评估了 100 种杂交和 40 种自交甜玉米（Zea maysL.) 在 6 个地点的有机系统中的 11 项试验中的基因型，并评估了增加的不完全块和行列设计的增加，以估计甜玉米基因型的性能。杂种在所有测试性状的性能上有所不同。近交亲本在自身表现和所有性状的一般配合力方面存在差异。对于混合条目，对复制的完整块以外的空间因素进行建模改进了模型适合开花天数、植物高度、穗高、外壳保护、穗宽和穗长。对于自交条目，对复制的完整块以外的空间因素进行建模改进了适合植物高度、穗高、柔软度和穗宽的 ∖ 模型。Wricke 的生态价 ( W ² _i) 是一种有用的稳定性度量，与本分析中考虑的三个稳定性统计中的两个具有相当好的相关性。基于 Wricke 的生态价，一些近交亲本在所有性状的结合能力方面在测试环境中比其他亲本更稳定。