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1、品种来源豫农704是河南农学院1969年用二南24自交系作母本,“525”自交系作父本配制育成的杂交种。这个品种已在河南省的南阳、许昌、洛阳地区和新乡、安阳、商邱等县大面积推广种植。豫农704于1976年引入我省,经过两年全省早熟组玉米区域试验和在汉阳县洪北大面积示范,都表现早熟、抗病、高产稳产、优质,可在我省低山和平原地区示范推广。2、产量表现豫农704引入我省参加全省早熟组玉米区域试验的结果:1976年十个点,平均亩产830.07斤,比对照群单105增产14.1％;1978年六个点,除郧阳点比对照新单1号减产0.6％外,在武汉、宜昌、保康、沔阳、恩施等五个点均比对照增产,增产幅度为3.7—
1, the source of varieties Yunsong 704 is Henan Agricultural College in 1969 with two South 24 inbred lines as the female parent, “525” inbred lines as the father of the preparation of hybrids. This variety has been widely planted in Nanyang, Xuchang, Luoyang and Xinxiang, Anyang and Shangqiu counties in Henan Province. Yuongnong 704 was introduced into our province in 1976. After two years of regional trial of premature corn in the province and a large area demonstration in Hongbei of Hanyang County, Yuongnong 704 showed early maturity, disease resistance, high and stable yield, high quality, and lowland and plain areas in our province Demonstration promotion. 2, yield performance Yuinong 704 into the province to participate in the province precocious corn regional test results: 10 points in 1976, the average yield 830.07 kg, compared with the control group alone 105 yield 14.1%; 1978 six points, except Yun Yang points than the new No. 1 0.6% reduction in the control, in Wuhan, Yichang, Baokang, Shenyang, Enshi and other five points than the control yield, increase of 3.7-