摘要
为研究不同类型象草(Pennisetum purpureumSchum.)产量与形态特征之间的关系,以杂交狼尾草(Pennis-etum americanum×P.purpureum)为对照,于2007年对16个象草实生苗株系以及紫象草(114)进行研究,对产量、叶/茎比、株高、分蘖数、叶长、叶宽以及茎粗等生物学性状进行了分析。结果表明:所有调查性状品系间存在显著差异(P<0.05);株高、分蘖数与产量成极显著正相关(P<0.01);叶长、叶/茎比与产量成极显著负相关(P<0.01);通径分析认为株高、叶/茎比对产量的直接作用最大;根据产量、株高以及叶/茎比等生物学性状可将参试材料分为矮生多蘖、较高中蘖、较高少蘖以及高大少蘖共4种类型。
In order to study the relationship between yield and morphological traits in napier grass,some important morphological traits including yield,leaf/stem ratio,plant height,tillers plant-1,leaf length,leaf width,and stem diameter of 16 lines of napier grass and one purple napier grass and hybrid penisetum（pearl millet×napier grass） as control were investigated in 2007.The results were as follows： The differences were significant for investigated traits among tested lines.There were significantly positive correlations between yield and plant height,tillers plant-1（P〈0.01） and significantly negative correlations between yield and leaf length,leaf/stem ratio（P〈0.01）.Plant height and leaf/stem ratio had the most important contribution to yield.The tested lines were divided into four groups by clustering analysis based on dry yield,leaf/stem ratio,plant height,etc.The four groups were dwarf and numerous tillers type,semi-dwarf and more tillers type,intermediate height and less tillers type,and high plant and less tillers type.
出处
《草地学报》
CAS
CSCD
北大核心
2009年第5期670-674,共5页
Acta Agrestia Sinica
基金
江苏省博士后基金(5310703)
国家科技计划(2008BADB3B10)
关键词
象草
产量
生物学性状
相关分析
通径分析
聚类分析
Pennisetum purpureum Schum.
Yield
Morphological traits
Correlation analysis
Path analysis
Cluster analysis
