一、良种的变革与作用三十多年来,福建水稻品种发生了翻天覆地的变化.解放前品种多、乱、杂、产量低的局面,通过地方品种评选、引种、高秆改矮秆、杂种优势利用等,面貌全然刷新.回顾其历程,大致可分为三个历史性变革时期,即高秆期、矮秆期和杂优矮秆期.其中,矮秆良种和杂交水稻的选育推广成功,是两个关键性突破 First, the transformation and the role of improved varieties Fujian rice varieties underwent earth-shaking changes over the past 30 years before the liberation of many varieties, chaos, miscellaneous, low-yield situation, through the selection of local varieties, introduction of tall stalks to change dwarf, hybrids The advantages of use, etc., the face completely refreshed.Review of its history, can be divided into three historic periods of change, namely, tall stalk, dwarf period and heterosis dwarf period.Among them, dwarf varieties and breeding of hybrid rice breeding Success is the two key breakthroughs