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豫芝四号是驻马店地区农科所用宜阳白作母本、驻芝一号作父本有性杂交育成。1989年经河南省品种审定委员会审定并命名为豫芝四号。具有早熟、高产、稳产、耐渍、抗病等特性。该品种1986—1989年经省和国家级95点次区试和生产试验中平均亩产66.63公斤,比对照(中芝7号、豫芝1号)平均增产21.26％。其中1986年河南省预备试验、平均亩产83.23公斤,比豫芝1号增产37.47％,同年全国预备试验,平均亩产60.43公斤,比中芝7号增产22.67％。1987—1988年河南省区试,平均亩产71.82公斤,比豫芝1号增产22.86％,同期全国区试平均亩产62.27公斤,比中7号增产8.92％。1987—1988年河南省生产试验,
Yuzhi No. 4 is Zhumadian Yiyang white used as the mother of the mother, in Chicago on the 1st parent sexual hybrid bred. In 1989 by the Henan Provincial Commission for species approval and named Yuzhi four. A precocious, high yield, stable yield, stain resistance, disease resistance and other characteristics. The average yield per mu was 66.63 kg in the provincial and national level 95-point sub-region test and production test from 1986 to 1989, an increase of 21.26% on average compared with the control (Zhongzhi 7 and Yuzhi 1). In 1986, Henan Province was ready to test, with an average yield of 83.23 kg per mu, an increase of 37.47% over that of Yuzhi No.1. In the same year, China prepared an average of 60.43 kg of mu per mu, an increase of 22.67% over that of Zhongzhi 7. 1987-1988 Henan Province trial, average mu yield 71.82 kg, an increase of 22.86% over Yuzhi 1, the same time the national average of 62.27 kg per mu, than the 7th yield 8.92%. 1987-1988 Henan Province production test,