【摘要】 采用大田试验,对中国北方1990s以来种植面积较大的50个玉米品种粗蛋白质含量(CPC)进行了研究。通过探测分析和正态分布测试检测表明,秸秆CPC、籽粒CPC和整株粗蛋白产量(CPY)分别符合正态分布N(5.48,0.532)、N(9.42,0.792)和N(530.67,64.632),三者的变化范围分别为4.38%～7.09%、7.03%～11.00%和417.43～726.72g/plant。籽粒CPC与秸秆CPC相关性不显著(P>0.05)。对籽粒和秸秆的CPC进行分层聚类,将北方玉米品种划分为籽粒高秸秆低型(HGLS)、籽粒与秸秆双低型(LGLS)和籽粒与秸秆双高型(HGHS)。目前CPC双高的HGHS型品种相对较少,仅占20%,应当加强该类型品种的选育工作。更多还原

【Abstract】 In field experiments,crude protein content (CPC)and yield of fifty maize varieties widely planted in the north of China since 1990s were studied. By exploring analysis and testing of normality for stalk CPC,gain CPC,and whole-plant CP yield (CPY),each of which accorded with normal distribution N(5.48,0.532),N(9.42,0.792),and N(530.67,64.632),respectively. The ranges of stalk CPC were 4.38%-7.09%,grain CPC were 7.03%-11.00%,whole-plant CPY were 417.43-726.72 g/plant. The stalk CPC was not significantly correlated with grain CPC (P>0.05). Through hierarchical cluster analysis for stalk CPC and grain CPC of the fifty maize varieties,the maize varieties could be classified into 3 types:high-grain CPC with low-stalk CPC type (HGLS),low- grain CPC with low-stalk CPC type(LGLS),and high-grain CPC with high-stalk CPC type(HGHS). Currently, maize varieties in the north of China were short of HGHS type hybrids which was only 20 percent,it is suggested that breeding and selection for this type of maize should be strengthened.更多还原