植物育种及育种学领域最近的进步（续）

• 作 者: 高桥 隆平 越钟
• 出 处: 科技简报
• 发表日期: 1977年17期
• 关键词: 植物育种 美国玉米 杂种第一代 收获面积 杂种优势 谷类作物 杂种 雄性不育 单位面积 远缘杂交

四、利用雄性不育的谷类作物杂种的育种杂种第一代植株表现出比双亲旺盛的生长发育,并且产量也显著增加的现象,自古以来就知道这是杂种优势。如表2所示,美国玉米收获面积在1933年起的30年间逐年减少,但产量却显著增加。这是由于单位面积的产量几乎增加了2倍,其原因的大部分被归结于优良的杂种种子的选育及其种子的普及。

Fourth, the use of male-sterile grain hybrids of hybrids The first generation of plants showed more than the parental growth and development, and the yield was also significantly increased phenomenon, since ancient times to know that this is heterosis. As shown in Table 2, the area harvested by the U.S. maize decreased year by year in the 30 years starting from 1933, but the yield was significantly increased. This is due to the fact that the yield per unit area has almost tripled, largely due to the breeding of fine hybrid seeds and the popularization of their seeds.