目前在农业生产上有许多作物,如玉米、高粱、番茄、水稻等都在利用杂种优势以提高产量。还有许多作物,如小麦等,正在开展研究杂种优势的利用。所以杂种优势在农业生产上的应用越来越广泛了。如何固定杂种优势?不需要每年重新配制杂种种子,是急需解决的重要问题之一。现在有几种可以固定或部份固定杂种优势的设想,这些设想是从现有的两种杂种优势的遗传理论上的假设出发的。第一种假设是等位基因互作。在同一个 At present, there are many crops in agriculture, such as corn, sorghum, tomato, rice and so on, which are using the heterosis to increase the yield. There are many other crops, such as wheat, which are studying the use of heterosis. Therefore, heterosis is more and more widely used in agricultural production. How to fix the heterosis? Do not need to re-formulating hybrid seeds each year, is an urgent need to solve one of the important issues. There are several assumptions that can be made to immobilize or partially stabilize heterosis. These assumptions are based on the genetic hypothesis of two existing heterosis. The first assumption is allelic interaction. In the same one