玉米亚热带改良系杂种优势表现的研究

Study on Heterotic Performances of Subtropical Improved Inbred Lines of Maize

采用3套增广NCⅡ设计,对玉米亚热带材料的改良系与吉林省骨干自交系的杂种优势表现及配合力进行了研究。结果表明:亚热带改良系与塘四平头、旅大红骨系统杂交单株产量表现出较高的杂种优势,在18个高的优势组合中,有2/3是亚热带改良材料与塘四平头、旅大红骨系统组配的组合。

Three augmented NC Ⅱ designs were adopted in this experiment and studied on the heterotic performances and genetic characteristics of subtropical improved lines and key inbred lines of Jilin province. The results showed that the ear-kernel weight had high heterosis when subtropical improved lines crossing with Tang and Lv group.Two-thirds of combinations were crossed by subtropical improved lines and Tang group, Lv group in eighteen high heterotic combinations.