白花泡桐×兰考泡桐杂种F_1自然接干性状的遗传变异  

Genetic Variation of Natural Stem-join Characters of P. fortunei×P. elongata Hybrid F_1 Clones

作　　者：叶金山[1] 胡伟华[1] 谢青[1] 杨文萍[1] 

机构地区：[1]国家林业局泡桐研究开发中心,郑州450003

出　　处：《东北林业大学学报》2008年第4期1-3,7,共4页Journal of Northeast Forestry University

基　　金：河南省自然科学基金项目(0611032600)资助

摘　　要：运用种间杂交试验、田间试验和统计分析的方法研究了白花泡桐×兰考泡桐杂种F1无性系自然接干性状的遗传变异规律,结果表明:①白花泡桐×兰考泡桐的自然接干性状在杂种F1无性系水平上存在广泛而明显的遗传变异性。②白花泡桐×兰考泡桐的正反交试验揭示了4对假二叉分枝相对性状的遗传变异规律和无正反交效应的特性。③除通直度性状没有达到显著性差异外,其余的自然接干性状都有极显著的差异性。④自然接干性状在白花泡桐×兰考泡桐杂种F1无性系间存在极显著的差异性。⑤大多数白花泡桐×兰考泡桐杂种F1无性系在胸径性状上无显著性差异,而少数白花泡桐×兰考泡桐杂种F1无性系在绝大多数自然接干性状上都有显著性差异。⑥接干材积因子、主干材积因子和主干平均削度因子分别为第一、第二和第三主成分,其总贡献率为77.09%。⑦pfe12和pfe10是参试无性系中自然接干性表现最好的二个优良无性系。A study was conducted to analyse the genetic variation of the natural stem-join characters of P. fortunei （ Seem. ） Hemsl. ×P. elongata S.Y. Hu hybrid F1 clones by means of interspecific crossing experiment, field test and statistical analysis. Results showed that the natural stem-join characters of P. fortunei x P. elongata had extensive and obvious genetic variations at the hybrid F1 clone level. The reciprocal cross experiments on P. fortunei × P. elongata and P. elongata × P. fortunei revealed concrete genetic variation regularities of relative characters of four pairs of pseudo-blfurcate branch and the characteristics without reciprocal cross effects. Apart from the insignificant difference in straightness of stem, marked differences were found in other natural stem-join characters. The natural stem-join characters had extremely marked difference between the hybrid F1 clones of P. fortunei × P. elongata. Most hybrid F1 clones showed unobvious differences in diameter breast high, but a few had marked difference in most natural stem-join characters. Stem-join volume factor, main stem volume factor and average taper of main stem were the first three main components, and the total contribution rate was 77.09%. Pfe12 and pfe10 were the finest hybrid clones among all the experimental clones. Some important genetic parameters were calctdated simply.

关 键 词：白花泡桐×兰考泡桐 杂种F1无性系 自然接干性状 遗传变异 

分 类 号：S792.43[农业科学—林木遗传育种] S722.34[农业科学—林学]