一、什么是杂交育种 自然界茫茫众生,巨大的古木苍松、细小的一花一草,组成它躯体的最小单位是细胞,繁衍它生命的更小物质是精卵细胞。“种瓜得瓜,种豆得豆”,“一娘生九子,九子各不同”的遗传及变异现象的奥秘,就来源于这些看不见、摸不着的最小最小的单位,这就是物种形成和发展的内因所在。毛主席说:“内因是变化的根据”,杂交育 First, what is the vast population of nature breeding cross-breeding, huge ancient pine, small flowers, the smallest unit of the body is composed of cells, multiply its life is the smaller material is sperm cells. The mystery of the genetic and variation phenomena of “growing a melon and harvesting beans,” “giving birth to nine sons and nine sons,” comes from the smallest and smallest units that can not be seen or touched. This is the species The formation and development of the internal causes. Chairman Mao said: “Internal factors are the basis for change” and hybrid education