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70年代中期,中华大地上出现一种由异花授粉产生种子、直接栽培杂种一代而获得显著增产效果的神奇稻,这就是杂交水稻。1976年以来,杂交水稻在我国稻作区得到迅猛发展,对提高水稻单位面积产量、促进我国粮食生产的发展起了很重要的作用。 杂交水稻的育种、制种和杂种栽培,表现出?
In the mid-1970s, there appeared a kind of magical rice in China, where seeds were produced by cross-pollination and the hybrids were directly cultivated to yield significant yield increase. This is hybrid rice. Since 1976, the rapid development of hybrid rice in paddy fields in our country has played an important role in improving the yield per unit area of paddy and promoting the development of grain production in our country. Hybrid rice breeding, seed and hybrid cultivation, showing?