小麦品种的抗赤霉病性是受多基因控制的数量性状,该性状的遗传力偏低,且抗性基因间存在着加性效应。应用简单的常规手段,很难把控制同一抗性性状的多个主基因组合在一起,更难发挥为数众多的微效基因重组和累加的潜在效应。众所周知,轮回选择是采用多亲本进行杂交组群,通过不断的“选择—互交组群—选择”的程序,把分别存在于各品种(个体)上的优良基因结集起来,组成各种优异基因重组体,它在改良主要由加性基因控制的目标性状方面有突出的效果。显然,采用轮回选择法是小麦抗赤霉病育种中的一个有效方法。国外虽有报道,在燕麦、大豆、春小麦和烟草等自花授粉作物中采用闭合群体进行轮回选择的反 Fusarium head blight resistance of wheat cultivars was a quantitative trait controlled by multiple genes. The inheritance of the traits was low and additive effects existed among the resistant genes. Using simple conventional methods, it is difficult to combine multiple major genes that control the same resistance trait and make it harder to exert the potential effects of a large number of micro-gene recombination and accumulation. As we all know, reincarnation is the use of multi-parent crossbred groups, through continuous “selection - cross-group-selection” program, the existence of various varieties (individuals) of the excellent genes together to form a variety of excellent genes Recombinant, it has a prominent effect in improving the target traits mainly controlled by additive genes. Obviously, the adoption of the cycle selection method is an effective method for the breeding of wheat against Fusarium head blight. Although it has been reported in foreign countries, self-pollinated crops such as oats, soybean, spring wheat and tobacco are closed