Breeding and Cultivation Techniques of New Maize Varieties Zhongxuan 737 with High Yield and Dense Tolerance
Zhongxuan 737 is a new maize variety with high yield,multi-resistance and wide adaptability,which was bred by cross selection of self-bred inbred line CN301 as the female and XJ2013 as the male by Institute of Cotton Research of CAAS.The main maize variety Xianyu 335 in the spring planting area of Northwest China was applied as the control,a 2-year regional experiment and one year production experiment were carried out to provide scientific basis for the populariza-tion and application of new maize variety Zhongxuan 737.The test results showed that the average yield of Zhongxuan 737 in the 2-year regional trial from 2017 to 2018 was 14 775.0 kg/hm2,which was 4.9%higher than that of Xianyu 335.In 2019,the average yield of Zhongxuan 737 at each test site was 15 708.0 kg/hm2,an increase of 5.3%compared with the control Xianyu 335.Zhongxuan 737 showed the characteristics of high yield,stable yield,anti-fall,disease resistance and comprehensive resistance,and was suitable for planting in the middle and late maturing spring maize type area in Gansu Province.The breeding process,characteristics,yield performance and key points of cultivation technology of Zhongxuan 737 were introduced.
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