充分有效利用海南省南部地区,进行玉米自交系冬季繁殖,是解决杂交玉米制种亲本种子种源不足的有效途径,同时也是培育新品种不可缺少的关键环节,它可加快育种材料的世代选择,加快育种进度,缩短育种年限。每年都有数百家科研和种子生产单位南繁,特别是地处海南省南部的凌水、三亚、乐东现已成为国家指定的南繁基地。但由于海南特殊的地理位置和气候条件有别于北方,南繁时会出现这样或那样的问题。依 It is an effective way to solve the problem of lack of provenance of hybrid maize seed in the southern part of Hainan Province for winter maize inbred lines breeding. It is also an indispensable key link to cultivate new varieties. It can accelerate the generation selection of breeding materials , Speed ​​up breeding progress and shorten the breeding period. Every year hundreds of scientific research and seed production units Fanfan, in particular, is located in southern Hainan Lingshui, Sanya, Ledong has now become the national designated Fanfan base. However, due to Hainan’s special geographical location and climatic conditions are different from the north, South Fanfan will appear this or that problem. according to