摘要： 郑单14号（豫玉18号）在河南省和国家区试中比对照增产17.6%和12.4%，均居首位，在其他省区试中及试验示范中表现突出，比当地对照增产9.1%~53.3%，多居一、二位。该品种已通过4个省和国家审定，成为河南第一大、全国六大玉米主栽品种，已累计种植333.33多万hm²。该品种中上部叶片夹角小、叶向值大，群体叶面积变化为前快中稳后慢的理想曲线，干物质积累快，总量大，分配合理。叶片光合色素、蛋白质、可溶性糖含量高，过氧化物酶（POD）活性高，丙二醛（MDA）积累少，功能强，衰老慢。高抗多种病害，抗倒、抗旱，竖叶大穗，综合性状优良，品质好，适应性广，适合中等以上肥力地种植。

关键词: 玉米, 郑单14号, 选育

Abstract: Zhengdan 14(Yuyu18)corn hybrid was examined and approved by four provinces and nation.Its planted area ranked first in Henan Province and fifth in the country.The accumulative total planted area reached 3330000 hectare in China.The hybrid yield was 17.6%higher than control in Henan regional tests and 12.4% higher than control in national regional tests,and both ranked first.The inclination of middle and top leaf is small.The growth of populations' leaf area is fast in the early stage,stable in the middle stage and slow in the late stage.The dry matter accumulation is fast and allotted rationally.The content of the leaf photosynthesis pigment,protein and soluble sugar and the activity of the leaf peroxidase are high.Its leaves are with strong function and slow senescence.The hybrid is resistant to several disease,lodging and drought.It has high quality and strong adaptablity,and grows well in the soils with high and medium fertility in most provinces of the country.

Key words: Corn, Zhengdan 14, Breeding

中图分类号: 

• S513.035.1