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中文摘要：
对我国30份主要玉米自交系保绿性进行鉴定,结果表明：大部分自交系保绿性一般或较差,从供试材料中筛选出4份保绿性较强的玉米自交系178、沈3195、沈137和齐319,分别来源于旅大红骨类群（国内地方种质）和PB类群（国外引进种质）,可用于改良类群内其他材料的保绿性。
英文摘要：
Thirty major maize inbred lines were evaluated in stay-green trait.The results showed that most of them were ordinary or poor in stay-green trait except 4 lines（178,Shen 3195,Shen 137 and Qi 319） which had a good stay-green trait.The 4 stay-green inbred lines,stemming from the domestic L（u｜¨）dahonggu group and the foreign PB group,could be used to improve the stay-green trait of other lines within the same group.
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