杂交水稻于 2 0世纪 70年代初在中国研究成功并于 1976年大面积应用于生产以来 ,2 5ａ的时间过去了。截止目前 ,全球已有 2 0多个国家开展了杂交水稻研究 ,有少数国家已将杂交水稻成功应用于商业化生产。目前 ,在越南、印度、菲律宾、孟加拉、缅甸和美国 ,共种植杂交水稻约 70 Hybrid rice was successfully studied in China in the early 1970s and was applied to production in large area in 1976, with a time lag of 25a. Up to now, more than 20 countries worldwide have conducted hybrid rice research, and a few countries have successfully applied hybrid rice to commercial production. At present, about 70% of hybrid rice is planted in Vietnam, India, the Philippines, Bangladesh, Myanmar and the United States