竖叶大穗型玉米杂交种GS豫玉11号的选育

Breeding of New Corn Hybrid-GS Yuyu 11Wang Yibo Lu Lixing Wang Zhenhua

以Ｒｅｉｄ类群系８１１２作母本，旅大红骨类群选系３６０选为父本杂交育成了玉米新杂交种——ＧＳ豫玉１１号（９０—１）。该杂交种在１９９０～１９９１年河南省玉米区试中比对照种增产１４．９％，居首位；在１９９２～１９９３年全国夏玉米区试中，晋、鲁、豫、皖、苏五省平均比对照掖单２号增产１５．７％，居首位。在全国１０多个省试验示范中，比对照种增产８．７％～４７．５％，多居一、二位。群体叶面积变化为前快中稳后慢的曲线，植株氮代谢水平高，干物质积累快，总量大，分配合理，经济系数高。高抗多种病害，竖叶大穗，综合性状优良，品质好，中熟，适应性广，制种产量高。

GS Yuyu 11 is a wide adapting corn hybrid trials conducted in Henan province during 1990-1991 showed that its average yield of 529 kg/mu was significantly higher than that of check,whose yield increased by 14.9% and was the maximum one.Results from trials conducted in five provinces during 1992-1993 also demonstrated that its average yield of 512.3 kg/mu was significantly higher than that of control corn Yedan 2,the yield increased by 15.7%,and was the maximum too.Demonstration studies in ten provinces indicated that the yield increments ranged from 8.7% to 47.5%.The maximum yield reached 900 1 kg/mu in one demonstration experiment in summer corn in Henan.The growth of populations′ leaf area is fast in the early stage,stable in the middle stage and slow in the late stage.The level of nitrogen metabolism is high,dry matter accumulation is fast and allotted rationally.Therefore,the yield increase is siginificant.Yuyu 11 is resistant to several diseases and also resistant to lodging.The hybrid has good characters:high quality,medium maturity,wide range of suitable,high seed yield. It grows well in the soils with high and medium fertility in most provinces of the country.