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一、杂种优势及其理论杂种优势现象是人们早已熟悉的,远在1400多年前我国“齐民要求”一书已有马和驴杂交繁殖骡子的记载。目前杂种优势已在动植物生产中广泛应用,杂交玉米、杂交高梁、杂种猪、杂种鸡都已在生产上发挥了显著增产作用。近年来杂交水稻在我国也首先得到广泛应用,其它作物如小麦、谷子、棉花等杂种优势的利用也都在研究之中。
First, the heterosis and the theory Heterosis is people already familiar, far more than 1,400 years ago, China “Qi Min requirements ” a book has a horse and donkey hybrid breeding mules records. Currently heterosis has been widely used in animal and plant production, hybrid corn, hybrid sorghum, hybrid pigs, hybrid chickens have been produced in a significant increase in production. In recent years, hybrid rice has also been widely used in China. Other crops such as wheat, millet, cotton and other heterosis utilization are also under study.