在毛主席无产阶级革命路线指引下,高粱杂种优势的利用,已在全国推广,增产效果显著。水稻杂种优势利用的研究工作,在我国虽然只有几年的历史(日本已进行了几十年),但进展很快,全国各水稻区对“三系法”的研究已取得不少成绩,现正研究主攻保持系这一难题。 Guided by Chairman Mao’s proletarian revolutionary line, the utilization of sorghum heterosis has been promoted throughout the country, and the effect of increasing yield is remarkable. Although the research on the utilization of heterosis in rice has been going on for only a few years in our country (Japan has been for decades), progress has been made rapidly. The research on the “three lines” in various paddy areas throughout the country has made quite a lot of achievements. Main research is to maintain the Department of this problem.