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一、玉米优良杂交种介绍1、“豫农704”单交种品种来源:河南农学院1969年用二南24自交系作母本,525自交系作父本育成的玉米单交种。产量表现:1970年在郑州本院农场夏播鉴定试验中,亩产918斤,比“新单一号”增产36.1%。1973年在夏播产比试验中亩产1071斤,比“新单一号”增产41%;同年在商丘五里杨大队和社旗韩庄大队试验,分别比新单一号增产50.9%和5%,1974年在本院农场夏播产比结果,亩产1111.9斤,比“新单一号”增产37%,比“郑单二号”增
First, the introduction of excellent hybrid corn 1, “Henan 704” single cross-species varieties of origin: Henan Agricultural College in 1969 with two South 24 inbred lines as the female parent, 525 inbred lines as the parent bred maize single cross. Yield performance: In 1970, in our summer farm broadcast test in Zhengzhou, 918 kg of mu was produced, an increase of 36.1% over that of “New Single No.”. In 1973, the mu production of 1071 kg in the summer broadcast ratio test was 41% higher than that of “New Single No.”. In the same year, the Wuli-Yang brigade and Shangqi Hanzhuang Brigade in Shangqiu experimented with 50.9% and 5% respectively over the new single No., In 1974, compared with the results of summer sowing in our hospital farms, 1111.9 kg of mu per mu were produced, an increase of 37% over that of the “New Single No.”