一、引言利用我国幅圆广阔、南方四季温暖的有利自然条件,北方省份在南方建立作物育种与良种繁育基地,一年进行两次选育工作,以加速作物选种与繁种数量,是作物育种与良种繁育工作正在探讨的新途径之一。我 I. INTRODUCTION Taking advantage of the vast natural environment in our country and warm seasons in the south, the northern provinces set up crop breeding and breeding bases in the south. They conducted breeding work two times a year in order to speed up crop selection and breeding. Crops are crops Breeding and breeding work is one of the new ways being explored. I