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1杂交组合的选择针对多年来喀什、w口1’Uhrt在S。704玉米制种过程中存在的诸多技术难题，我们对SC704单交种（南斯拉夫）、正交三系配套SC704（新疆农大）和改良SC704（新疆农垦科学院）进行多点制种试验。对比试验发现SC704单交种和正交三系配套S。704在喀什地区6月中下旬至7
1 Selection of hybrid combinations For many years Kashgar, w mouth 1’Uhrt in S. 704 Many technical problems existed in the seed production of maize. We conducted the multi-spot seed production test on SC704 single cross (Yugoslavia), orthogonal three-line SC704 (Xinjiang Nongda) and improved SC704 (Xinjiang Academy of Agricultural Sciences). Comparative test found that SC704 single cross and orthogonal three-line supporting S. 704 in Kashgar region in late to mid-July