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我省高海拔地区春播玉米和中部地区夏播米玉的生育中、后期常受低温、冷害的影响。这是我省玉米产量低而不隐的重要原因之一。为了摸清其规律,我们于1982年以“铜单1号”为主要亲本之一,组配了一些不同类型的杂交组合,分别在云南元江(1982年秋播)和贵阳(1983年春播)进行鉴定。研究了玉米生育中、后期的低温反应。 一、材料与方法 (一)材料 1982年夏用“铜单1号”作主要亲本之一,随机组配了20个双交种,25个三交种;另以常用的自交系组配单交种18个,合计63个组合,以“黔单4号”为对照。
The spring sowing of corn in high altitude areas of our province and the sowing of summer sowing of jade in the middle area are often affected by low temperature and cold damage in the later period. This is one of the important reasons why the corn yield in our province is low and not hidden. In order to understand its law, we used “Tongdan 1” as one of the main parents in 1982 and assembled some different types of hybrid combinations in Yunnan Yuanjiang (autumn 1982) and Guiyang (spring 1983) respectively Identification. The low temperature response of maize was studied in the later period. I. Materials and Methods (I) Materials In the summer of 1982, “Copper Dan 1” was used as one of the main parents. 20 double crosses and 25 triple crosses were randomly allocated. The other commonly used inbred lines Single cross-species 18, a total of 63 combinations, “Qiandan 4” as a control.