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Ｅ２８是以Ａ６１９Ｈｔ１为母本，旅９宽为父本，１９７７年组配，经与旅９宽回交三次，然后自交选育而成．试验、示范结果表明：Ｅ２８抗大斑Ｈｔ１基因，抗病、抗虫、抗倒、配合力高，生育期适中．以Ｅ２８为父本与Ｍｏ１７Ｈｔ１、５００Ｕ等为母本，配制成的丹玉１３号、沈单７号杂交种，已在全国范围内大面积应用推广，成为近年来国内同类研究水平中，应用面积最大、经济效益最高的一个优良自交系．
E28 is A619Ht1 as the female parent, Brigade 9 wide as the paternity, with the 1977 grouping, and the Brigade 9 back to back three times, and then self-breeding. The results showed that E28 was resistant to large spot Ht1 gene, resistant to disease, insect pests, lodging resistance, high combining ability and moderate growth period. With E28 as the male parent and Mo17Ht1,500U as the female parent, formulated Dan Yu 13, Shen Dan 7 hybrids, has been widely applied throughout the country to promote, become the same level of research in recent years, the application area Maximum, the highest economic efficiency of an excellent inbred line.