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长早7号是我所1992年利用两个早熟玉米自交系杂交选育而成的一个早熟、高产、质优、抗病的优良玉米杂交种。1996年4月山西省农作物品种审定委员会第22次会议通过认定，准予推广种植。1品种特征特性及产量表现长早7号是以自选系长455作母本，外引系获塘嘉作父本杂交选育而成。幼
As early as 7 on the 7th is our early 1992, the use of two early-maturity inbred corn inbred and breeding of a precocious, high yield, high quality, disease-resistant maize hybrids. In April 1996, the 22nd Meeting of Shanxi Crop Variety Approval Committee was approved and the plantation promotion was allowed. 1 characteristics and yield characteristics of varieties Changzao No. 7 is based on the optional length of 455 as the female parent, cited outside the Department of Tang Jia parental cross breeding. young