10份先锋改良玉米自交系配合力分析与抗病评价

以10份先锋改良父本玉米自交系为供试材料,以2份先锋骨干母本自交系(PH 6 WC、PHHJC)和2份课题组改良先锋母本系(丹L 658、丹5866)为测验种,采用NCⅡ不完全双列杂交设计,对7个玉米主要性状进行配合力测定,并在自然发病的条件下对10份自选系进行了抗3种叶斑病(大斑病、灰斑病、弯孢菌叶斑病)病害评价。结果表明,丹Y 6882、丹Y 5327、丹Y 3123等3个自选系产量等性状一般配合力较高,且与多个测验种组配出高产组合,具有较高的应用潜力。抗性鉴定结果表明,丹Y 5327和丹Y 3123对3种叶斑病表现出较好的抗性,丹Y 6882较感叶斑病。

Combining Ability Analysis and Disease Resistance Evaluation of 10 Pioneer Improved Maize Inbred Lines

In this paper,10 pioneer improved male parent maize inbred lines,two pioneer backbone female inbred lines(PH 6 WC and PHHJC)and two improved pioneer female inbred lines(Dan L 658 and Dan 5866)by research group were used as test lines to investigate combining ability of 7 main traits of maize by NCⅡincomplete diallel cross design and determined the resistance of 10 self-selected maize lines to to three leaf spot diseases including leaf blight,grey speck disease and corn curvalaria leaf spot under the condition of the nature.The results showed that three self-selected lines,Dan Y 6882,Dan Y 5327 and Dan Y 3123,had high general combining ability of yield and other traits,and had high application potential by combining with several tested varieties to produce high-yield combinations.The results of resistance identification showed that Dan Y 5327 and Dan Y 3123 appeared good resistance to three leaf spot diseases,but Dan Y 6882 was more susceptible to leaf spot disease.