多抗性玉米自交系E28的选育与利用

Application of Multiple Resistance Inbred Line E28 of Corn in Breeding

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．

Inbred line E28 was derived from cross Lu-9kuan×A619Ht1 in 1977,and back crossed with Lu-9kuan for three times,then selected from its self-pollinated progeny. E28 has the gene Ht1 which resisted to Hlminthosprium Turcicum and also has the characters to resist corn borer and lodging resistance. It has high combining ability and wide adaptaion in most province in China. The hybrid varieties Mo17Ht1×E28 and 5003×E28 named as Danyu-13 and Shen Dan-7 occupied larger areas of maize than any other hybrids. The economic effetiveness and planting areas of hybrids with E28 is the best and largest one in China in recent year.