我国于５０年代后期开始南繁，取得了巨大成就。据有关资料统计，仅自８０年代以来，全国经过南繁缩短３年至５年育成的品种共有二千余个，涉及三十多种作物。但是我们也不能不看到，我国的南繁工作还存在一些问题。最突出的就是几十年来，南繁的方法和技术手段几乎没有什... Our country started to make Nanfan in the late 1950s and made great achievements. According to relevant statistics, only over 2 000 varieties have been bred in the country since the 1980s with a shortening of 3 to 5 years and involve more than 30 kinds of crops. However, we can not fail to see that there are still some problems with our country's Fanfan work. The most prominent is that for decades, South Fanfan methods and techniques almost no ...