Butts-Wilmsmeyer Carrie J, Mumm Rita H, Bohn Martin O
Department of Crop Sciences, University of Illinois at Urbana-Champaign , 1102 South Goodwin Avenue, Urbana, Illinois 61801, United States.
J Agric Food Chem. 2017 Sep 27;65(38):8311-8318. doi: 10.1021/acs.jafc.7b02034. Epub 2017 Sep 19.
Although previous studies have examined the concentration of various nutritional compounds in maize, little focus has been devoted to the study of commercial maize hybrids or their inbred parents. In this study, a genetically and phenotypically diverse set of maize hybrids and inbreds relevant to U.S. commercial maize germplasm was evaluated for its variability in phytochemical content. Total protein, unsaturated fatty acids, tocopherols, soluble phenolics, and insoluble-bound phenolics were evaluated in this study. Of these compounds, only soluble and insoluble-bound phenolic acids exhibited means and variances that were at least as large as the means and variances reported for other sets of germplasm. This suggests that selection for high phenolic acid content is possible in current U.S. commercial germplasm. In contrast, while the total protein, unsaturated fatty acid, or tocopherol content could possibly be improved using current U.S. commercial germplasm, the results of this study indicate that the incorporation of more diverse sources of germplasm would most likely result in quicker genetic gains.
尽管此前的研究已考察了玉米中各种营养化合物的浓度，但对商业玉米杂交种或其自交亲本的研究却很少。在本研究中，对一组与美国商业玉米种质相关的、在遗传和表型上具有多样性的玉米杂交种和自交系进行了植物化学含量变异性评估。本研究评估了总蛋白、不饱和脂肪酸、生育酚、可溶性酚类和不溶性结合酚类。在这些化合物中，只有可溶性和不溶性结合酚酸的均值和方差至少与其他种质组报告的均值和方差一样大。这表明在美国当前的商业种质中选择高酚酸含量是可能的。相比之下，虽然使用美国当前的商业种质可能提高总蛋白、不饱和脂肪酸或生育酚含量，但本研究结果表明，纳入更多样化的种质来源最有可能带来更快的遗传增益。
