水稻杂种优势利用的研究成功并迅速应用于生产,是无产阶级文化大革命以后,在毛主席革命路线指引下,我国科技人员和广大贫下中农相结合所取得一项重大突破的科研成果。杂交水稻1973年三系配套,1974年进行杂种优势鉴定,全国有85亩试种,1975年有5600亩栽 The successful and rapid application of rice heterosis in production is a scientific breakthrough made by our scientific and technological personnel and the vast majority of poor and middle peasants under the guidance of Chairman Mao’s revolutionary line after the Great Proletarian Cultural Revolution. Hybrid rice three lines in 1973 supporting the 1974 Heterosis identification, the country has 85 acres of trial planting, planting 5600 acres in 1975