美洲黑杨×青杨F_1无性系生根性状的遗传变异及C效应  

Genetic Variation and C-effects in Rooting Characteristics of Populus deltoides×P. cathayana F 1 Clones

作　　者：李火根[1] 黄敏仁[1] 陈道明[1] 

机构地区：[1]南京林业大学

出　　处：《东北林业大学学报》1998年第3期12-15,共4页Journal of Northeast Forestry University

基　　金：国家"八五"科技攻关专题

摘　　要：通过水培生根试验，对１２个美洲黑杨×青杨Ｆ１无性系及两亲本的最早生根时间、主根总长、主根数、侧根数等生根特性进行了研究。所有生根性状均存在显著或极显著的无性系差异，无性系方差占总方差的１４％７０％～３９６６％，并具有较强的超亲优势；以无性系平均为基准的广义遗传力均较高，选择生根能力好的无性系是有效的。所有生根性状均存在极显著的Ｃ效应，Ｃ效应方差占总方差的１３７２％～２０８１％，在进行早期无性系选择时应引起重视。he date of first root emergence( D R ), length of main roots ( L M ), number of main roots ( N M ) and number of lateral roots ( N L ) of 12 Populus deltoides ×P. cathayana F 1 clones and their parents were investigated based on cutting culture in water containers. Clonal variation is highly significant for all rooting characteristics, and accounts for 23.96%, 14.70%, 21.91% and 39.66% of the total variation for D R, L M, N M and N L respectively. It is possible to select superior clones of good rooting characteristics for the strong hybrid vigor and high broad-sense heritabilities based on clone-means ( H 2 ). The results also indicate that C-effects is highly significant for 4 rooting traits, and accounts for 13.72%, 19.30%, 20.81% and 20.57% of the total variation for D R, L M, N M and N L respectively. C-effects cann't be ignored when early clone selection be made.

关 键 词：美洲黑杨 青杨 生根性状 遗传变异 无性系 

分 类 号：S722.34[农业科学—林木遗传育种] S792.110.4[农业科学—林学]