“C郑单二号”是省农林科学院粮食所玉米育种研究室,利用雄性不育系杂交育成的玉米优良杂交种.它不仅能节约大量去雄用工,而且能保证制种质量和提高产量.经省内外77个点试验、示范,平均亩产732.5斤,较正常郑单二号增产6.4%,1981年在我省密县、汲县大面积生产示范,表现抗病、增产.母本C型雄性不育系塘四平头, “C Zheng Dan 2 ” is a maize breeding research institute of the Institute of Foodstuffs of the Provincial Academy of Agriculture and Forestry, which uses maize male sterile lines to breed fine hybrids of maize, which can not only save a large amount of males, but also ensure seed quality and increase The output was 77 points inside and outside the province, demonstrating an average of 732.5 kg of mu per mu, an increase of 6.4% over the normal number of Zheng Dan II. In 1981, a large-scale demonstration of production in Mi County and Jixian County showed disease resistance and yield increase. The C-type male sterile pond Siping flat,