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1982年秋,我们对关中13个县25个公社33个大队(农场)的玉米生产进行了考察,现将品种方面的问题报告如下: 一、关于接班品种的问题关中地区从六十年代初开始推广自交系间杂交种,当时是以双交种为主。七十年代以单交种代替双交种。从国内外的资料分析表明:生产上每一次品种的更迭,主要是前一个品种丧失抗病性,而并非完全由产量或其他因素所造成。我省推广的陕玉661、662、陕单1号、黄白单交、白单4号、陕单7号等都因大小斑病、丝黑穗病等已经或正在淘汰,但其适应性和丰产性并不低于目前推广的抗病品种中单2号和户单1号。
In the autumn of 1982, we investigated the corn production of 33 brigades (farms) in 25 communes in 13 counties in Guanzhong. Now we report on the breed problems as follows: I. Issues Concerning the Succession Varieties Guanzhong area has been popularized since the early 1960s Inbred line hybrids, was based on double crossbreed. Seventies single cross instead of double cross species. According to the data analysis both at home and abroad, the change of every breed in production is mainly caused by the loss of disease resistance of the former species, not entirely by the yield or other factors. Shaanxi Province, Shaanxi Province, 661,662 promotion, Shan Shan No. 1, yellow and white single pay, Bai Dan 4, Shan Dan No. 7, etc. due to the size of spot disease, head smut, etc. have been or are eliminated, but its adaptability and High yield is not lower than the current promotion of disease-resistant varieties in the No. 2 and No. 1 households alone.