Abstract: The correlative analysis of 25 fall-dormancy alfalfa cultivars on their 11 agronomic and 5 reproductive characteristics,and the regression analysis of their fresh forage yield and seed yield were carried out.The results showed that the cultivars'8 agronomic characteristics were directly influenced by fall dormancy;they were fresh forage yield,plant height,stem length,node numbers,leaf area,leaf length,leaf width,and winter survival rate.Among these characteristics,the fresh forage yield exhibited a significant positive correlation(0.806),and the winter survival rate an immensely significant negative correlation((-0.957)),while the other 6 characteristics revealed tremendously significant positive correlations.Their correlation indices were successively: leaf area(0.995),stem length(0.987),leaf length(0.983),plant height(0.940),node numbers(0.900),and leaf width(0.885).Immensely significant negative correlations existed between the 5 reproductive characteristics of the alfalfa cultivars and fall dormancy.The successive order of the correlation indices was: fertile shoots(-0.959),seed yield(-0.958),pod number/fertile shoot((-0.954)),1000-seed weight(-0.943),seed number/pod(-0.859).

Key words: Alfalfa, Fall dormancy, Quantitative characters, Correlation, Regression model

摘要： 对25个不同秋眠级苜蓿品种的11个农艺性状和5个生殖性状进行相关分析,并对其鲜草产量和种子产量的构成进行回归分析。结果表明:受秋眠级直接影响的性状有鲜草产量、株高、主茎长、茎节数、叶面积、叶长、叶宽和越冬率等8个性状,其中产草量与秋眠级呈显著正相关,相关系数0.806,越冬率与秋眠级呈极显著负相关,相关系数-0.957,其余6个性状与秋眠级均呈极显著正相关,相关系数依次为叶面积0.995、主茎长0.987、叶长0.983、株高0.940、茎节数0.900、叶宽0.885;所测苜蓿的5个生殖性状,均与秋眠级呈极显著负相关,相关系数依次为生殖枝数-0.959、种子产量-0.958、荚果数/生殖枝-0.954、千粒重-0.943、种子数/荚果-0.859。

关键词: 苜蓿, 秋眠级, 数量性状, 相关分析, 回归方程