改良混合选择法,也叫单株混合选择法,是小麦莜麦等自花授粉作物进行品种提纯复壮的有效方法之一,目前全国各地都在采用。这种方法一般要经过三个步骤,就是单株选择,分系比较和混系繁殖。有的地方分系比较只进行一年(建立穗行圃和原种圃),通称两圃法;有的地方分系比较进行两年(建立穗行圃、穗系圃、原种圃),通称三圃法。这种方法六十年代初开始在我们内蒙地区进行试验,七十年代初普遍推广。由于 Improved hybrid selection method, also known as single plant mixed selection method, is one of the effective methods of purifying and rejuvenating varieties such as wheat oatmeal self-pollination crops, which are currently used all over the country. This method is generally go through three steps, namely, single plant selection, comparison of subsystems and mixed breeding. Some local branches are only compared to one year (the establishment of the ear nursery and the original nursery), commonly known as the two nursery; some local branches compared to two years (the establishment of spike nursery, spike nursery, the original nursery) Known as the three nursery. This method began in the early 1960s in Inner Mongolia, where we experimented and was generally promoted in the early 1970s. due to