介绍2019年美国玉米高产竞赛情况和竞赛结果，分析全美优胜者的分布区域、选用种子品牌及信息，进而分析玉米高产原因，从而提出美国玉米高产竞赛对我国玉米生产的启示和建议。

This paper briefly introduces the National corn yield contest in America in 2019. And based on the results of the competition to analyze the distribution area of the winners in the United States, the selection of seed brands and information, and then analyzes the reasons for the high yield of corn, so as to put forward the enlightenment and suggestions of the high yield competition of corn in the United States for China's corn production.

玉米单倍体人工加倍研究及再生植株的倍性鉴定（y81991501）