贵州省玉米三交种的选育与利用

Breeding and Utilization of Maize Tri-crossed Hybrid in Guizhou

简要介绍了玉米三交种的特点,对玉米三交种的生产特性与单交种进行了比较,同时通过对贵州省玉米三交种的选育与利用情况分析,认为三交种更适于山区复杂生产条件和低投入、粗放管理的生产模式,应加强三交种选育的理论研究和投入。总结了贵州省玉米三交种的亲本来源和组配方式:三交种的父本主要采用植株高大、雄穗发达、花粉量大、配合力高的自交系,来源为热带种质和地方种质。组成母本杂交种的自交系的组配方式一般采用地方种质×含有地方种质的自交系、地方种质或含有地方种质的自交系×温带种质。

Maize tri crossed hybrid is suitahle to the diversified production condition in mountainous area and production model of lower cost and extensive management through the comparison of production characteristic between tri-cross and slngle-cross hybrid and the breeding and utilization of maize tri cross hybrid in Guizhou, which shows that the breeding theory and investment in tri- cross hybrid items should be strengthened. The inbred line from tropical and local germplasm with tall and big plant, flourishing tassel and vigorous combing ability should be selected as the male parent [or breeding of tri-cross hybrid. The parent of female hybrid should be combined with local germplasm × part local germplasm inbred line, and the inbred line with local or part local germplasm × subtropical germplasm.