2. According to local chronicles and county records of various provinces, corn was first introduced to China in Guangxi, with a time of 153 1 year, less than 40 years later than Columbus' discovery of America.

Extended data

1, related incoming

(1) Wheat and barley: native to West Asia, introduced about 4000 years ago.

(2) Sorghum: originally from Africa, it was introduced to India from Egypt in the Western Zhou Dynasty. It was introduced in the Song and Yuan Dynasties.

(3) Skin oats: native to Europe. Naked oats (naked oats) are native to China.

(4) Lotus root: A pot of lotus root soup was unearthed in Mawangdui Han Tomb, but lotus root was introduced from South Asia.

(5) Potatoes: native to America, introduced and planted in the late Ming Dynasty.

2. Corn has been introduced into China for more than 400 years. The maize planted in China is mainly to popularize imported varieties, and through the combination of natural selection and artificial selection, varieties suitable for China's environment can be obtained. Before 1950, only a small amount of cross breeding research was carried out in China, and it was not applied to production. In fact, the theoretical research on maize hybridization can increase yield began as early as the United States 1909.

Reference corn (Gramineae) _ Baidu Encyclopedia?