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首页> 外文期刊>Australian Journal of Crop Science >Mixed models and multivariate approach applied to maize breeding: A useful tool for biofortification
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Mixed models and multivariate approach applied to maize breeding: A useful tool for biofortification

机译：应用于玉米育种的混合模型和多变量方法：生物侵蚀的一种有用工具

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Biofortification and bioactive compounds enrichment of maize genotypes is a great alternative for mitigating micronutrients deficiency in human and animal diet, and also for improving the benefits of maize for human health. This work aimed to estimate variance components and genetic parameters of bioactive compounds and micronutrients to predict superior maize hybrids from different genetic bases, and to apply the RELM/BLUP methodology to multivariate techniques. The inbreed lines were crossed and the F1 hybrids were grown for evaluations in 2014/2015 and 2015/2016 growing seasons, respectively. Then, micronutrients and bioactive compounds related traits were evaluated. The variance components and genetic parameters were estimated by REML methodology. The BLUP methodology was employed to predict genetic values and to verify the percentages of genetic gain with selection. The predicted genetic values were applied to estimate genetic distances by the Mean Euclidean Distance. The relative contribution of each trait to genetic divergence was evaluated and the principal components analysis determined, proposing the genotypes that are potentially capable to increase a given trait. The presence of genetic variability was evidenced among genotypes, while some of them presented potential for increasing specific traits. The top cross hybrid L64XAS1590 showed the highest estimates for increasing antioxidant-responsible traits, and micronutrients contents such as manganese, cooper, iron and zinc. In general, there was the possibility of achieving genetic gains with selection under application of biofortified and bioactive compounds to enhance maize hybrids through conventional breeding. However, it does not applicable for iron content due to its low estimate of broad sense heritability.
机译：玉米基因型的生物侵蚀和生物活性化合物是一种巨大的替代，用于减轻人类和动物饮食中的微量营养素缺乏，还可以改善玉米对人体健康的益处。这项工作旨在估算生物活性化合物和微量营养素的方差分量和遗传参数，以预测来自不同遗传基础的优质玉米杂种，并将relm / blup方法应用于多变量技术。杂交线越过，F1杂种分别在2014/2015年和2015/2016年生长季节的评估中生长。然后，评估微量营养素和生物活性化合物相关性状。通过REML方法估计方差分量和遗传参数。采用增压方法来预测遗传值，并验证选择的遗传增益百分比。将预测的遗传值应用于通过平均欧几里德距离估计遗传距离。评估了每个性状对遗传分歧的相对贡献，并确定了主要成分分析，提出可能能够增加给定性状的基因型。基因型中证明了遗传变异的存在，而其中一些呈现出增加特定性状的可能性。顶部交叉杂交L64XAS1590显示出增加抗氧化剂的性状和微量营养素含量，例如锰，库珀，铁和锌的最高估计。通常，在施用生物染料和生物活性化合物，通过常规育种来实现在施用生物染料和生物活性化合物以增强玉米杂种的遗传增益。然而，由于其对广义遗传性的低估计，它不适用于铁含量。

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