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水稻杂优利用的“三系”配套初获成功,是我国农业科学研究的一项重大成果。1976年全国种植水稻杂种有200多万亩,我省也有1O多万亩,大多数获得增产。如因地制宜栽培得当,有不少面积的杂种水稻比当地种植的品种增产20-30％,表明杂交水稻确有较大的增产潜力。一、水稻杂优利用是增产的新途径所谓杂种优势,是指由两个不同遗传型(或基因型)的物种或品种经过杂交,其第一代表现比双亲有较强的生活力,生长势,适应性,抗逆性和丰产性的一种现象。利用这一现象
The successful application of the “three lines” in the utilization of rice hybrids is a major achievement of agricultural scientific research in our country. In 1976, more than 2 million mu of rice hybrids were planted in the country, and more than 10 million mu were also produced in the province, most of which had been boosted. If properly cultivated according to local conditions, many areas of hybrid rice yield 20-30% more than the local varieties, indicating that hybrid rice does have a larger yield potential. First, the use of hybrid rice is a new way to increase production The so-called heterosis, refers to the two different genetic types (or genotypes) of species or varieties through hybridization, the first generation of their performance than their parents have a strong viability, growth Potential, adaptability, resistance and high yield of a phenomenon. Use this phenomenon