玉米粒白黄色是转基因吗？
引言
玉米（Zea mays）是全球广泛种植的粮食作物之一，其品种繁多，颜色多样。在市场上，我们常见到玉米粒有白色和黄色两种颜色。关于这些颜色的玉米是否是转基因的，以下是一些权威信息的汇总。
玉米颜色的遗传因素
玉米粒的颜色主要由遗传因素决定，尤其是由玉米中的色素合成途径中的酶基因所控制。黄色玉米粒通常含有较多的类胡萝卜素，而白色玉米粒则含有较少的类胡萝卜素。
是否为转基因
根据美国农业部（USDA）和国家玉米改良协会（NAM）的信息，玉米粒的颜色并不是转基因技术的结果。传统育种方法已经能够培育出白色和黄色两种颜色的玉米品种。
权威信息来源
美国农业部（USDA）关于玉米的遗传改良信息：[USDA玉米遗传改良信息](https://www.ams.usda.gov/publications/content/almanacalmondsmangoesmilletmilletsorghumsorghumsoybeanssquashsweetpotatoestomatoestomatoestomatoeswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnutswalnuts
