杂种优势是自然界中广泛存在的现象,生物学大师达尔文曾根据当时的实践,得出自交有害、杂交有益的结论。人类在很早以前就把杂种优势广泛应用在动物和植物方面,杂种化巳成为农业生产的一个重要方面。马驴杂交产生的骡子、杂交稻、杂交高粱、杂交玉米等等,都是农牧业上应用杂种优势的典型事例。杂交为什么会产生优势呢?目前来看 Heterosis is a widespread phenomenon in nature, the biological master Darwin had based on the practice at that time, come to the conclusion that self-injurious hybrids useful. Humans have long been using heterosis for animal and plant use extensively, and hybridization has become an important aspect of agricultural production. The mules, hybrid rice, hybrid sorghum, and hybrid corn produced by donkey hybridization are all typical examples of the application of heterosis in agriculture and animal husbandry. Why hybrids have advantages? For now