改良HS相互轮回选择与玉米育种

群体改良是现代玉米育种的基础环节,非常重要,在国外被称作前育种(Pre-breeding),是玉米种质改良创新的核心技术.为了适应玉米杂交育种的需要,必须把群体改良技术转向相互轮回选择.CIMMYT已经全面转向相互轮回选择,而沿用了几十年的全同胞、半同胞、S1、S2及改良穗行法等已很少使用.美国、印度、津巴布韦、巴西等国也逐渐转向相互轮回选择.文章详细介绍了CIMMYT重点利用的改良HS相互轮回选择技术,并提出了对方法的优化及与育种结合的方案。

The Status of Modified HS Reciprocal Recurrent Selection in Maize Breeding

Maize germplasm improvement was the basic of maize hybrid breeding.It was named for Pre -breeding in developed countries.Recurrent selection was basic method and was the core technology for maize germplasm improvement and innovation.The technologies used in germplasm improvement will shift from intra-population selection into reciprocal recurrent selection inter-population due to the need of maize hybrid breeding.The reciprocal recurrent selection inter-population has been used in CIMMYT,and FS,HS,S 1 ,S 2 and modified row recurrent selection methods have less used.It was the same as America,India,Zimbabwe,Brazil ect.The modified HS reciprocal recurrent selection and the predigested method was introduced in this paper.