利用杂种优势是大幅度提高农作物产量的有效措施。为使杂种优势在生产上利用成为可能,一个先决条件就是能否采用简便易行而又经济的方法来配制一代杂种。利用自交不亲和系来配制一代杂种,在甘兰、大白菜等蔬菜上已有先例。甘兰型油菜属常异交作物,通过甘、白种间杂种后代的分离和甘兰型品种种子辐射处理后代筛选的途径,也已育成甘兰型的自交不亲和系。通过利用品种中存在的自交不亲和性,育成甘 The use of heterosis is an effective measure to significantly increase crop yields. One of the prerequisites for making use of heterosis in production is the possibility of formulating hybrids in a simple and economical way. The use of self-incompatibility to formulate a generation of hybrids, in cabbage, Chinese cabbage and other vegetables have precedent. Brassica napus is often outcrossing crops, through the separation of sweet and white interspecific hybrids and screening of the progeny of the radish of Brassica oleracea, the selfing incompatibility line of Brassica napus has also been bred. By using the varieties of self-incompatibility, bred Gan