The effects of Varieties, Locations and interactions between a Variety and a location; the adapting areas of Single-crosses and their high-yield ability were analysed, using the yield test data from fifteen test locations in Jilin Province in 1987.
The adapting areas of some single-crosses as following:
a. The higher-yield areas; the warm and moist middle-late-maturing regions in Siping and Liaoyuan,Were adaptive for Jidan 131;
b. The middle-yield areas, the warm and dry regions in Baicheng; Were adaptive for Sidan 14;
c. The other middle-Yield areas, included the warm and moist climate regions of Changchun, Jilin, Tonghua and the parts of Siping, adapting for Jidan 133;
d. The Low-yield areas, included the Low-temperature regions in the Parts of Changchun and Baicheng, adapting for Sidan 8.