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水稻的杂种优势 (一)杂种优势的概念两个遗传性不同的品种或类型进行杂交所产生的第一代杂种(F_1),往往比杂交亲本具有较强的生长势、适应性、抗逆性和生产力,这种超亲现象称为杂种优势。 (二)水稻杂种优势的表现水稻跟其他作物一样,同样存在着明显的杂种优势,但是不同的组合,其杂种优势表现形式各有不同,一般说来大体表现如下: 根系强大。杂种根多、根长、根粗,根扎得深,分布广。因此,吸收能力强,茎秆粗
The Heterosis of Rice (一) The Concept of Heterosis The first generation hybrid (F1) produced by two hereditary varieties or types of hybrids often has stronger growth vigor, adaptability and resistance to stress than hybrid parents And productivity, this super-pro phenomenon known as heterosis. (B) the performance of rice heterosis Rice and other crops, there are also obvious hybrid heterosis, but different combinations, their heterosis manifestations vary, generally speaking, the general performance is as follows: a strong root system. Roots and more hybrids, root length, root diameter, rooted deep, widely distributed. Therefore, strong absorption capacity, stem thick