Variation of growth traits of progenies of twenty-three cross combinations in Populus was analysed,and genetic variation among parents was studied by Amplified Fragment Length Polymorphism(AFLP).The results showed tha...Variation of growth traits of progenies of twenty-three cross combinations in Populus was analysed,and genetic variation among parents was studied by Amplified Fragment Length Polymorphism(AFLP).The results showed that growth traits of progenies and molecular genetic distance(GD) among parents had considerable variation.Correlation and regression analysis between molecular genetic distances among parents and growth traits of progenies indicated that the relationship between GD and growth was linear equation in a certain range(0.024 9～0.368 1),and that the relationship was quadratic parabola equation in a wide range(0.024 9～0.531 4).If the genetic distance among parents in Populus would range from 0.19 to 0.36,the ultimate effect of hybridization could be achieved based on the established relationship between GD and growth.展开更多
25 clones(6 trees from each clone) were sampled (aged 15 years) from clone test stand of Populus tomentosa. The fiber forms (fiber length, fiber width, ratio of fiber length and fiber width, fiber wall thinckness, fib...25 clones(6 trees from each clone) were sampled (aged 15 years) from clone test stand of Populus tomentosa. The fiber forms (fiber length, fiber width, ratio of fiber length and fiber width, fiber wall thinckness, fiber lumen diameter, ratio of 2 fiber wall thinckness and fiber lumen diameter, ratio of fiber lumen diameter and cell diameter) were analysed. Variance analysis showed that these 7 traits were significantly different among clones at 0.05 level. 2 characters, Fiber width and fiber lumen diameter, were strongly inherited, and others 5 traits were under moderate genetic control. The selection could be conducted effectively among clones. The variation analysis of microfibrillar angles showed that there was significantly difference among clones at 0.05 level. The clones repeatability (0.961) and single repeatability (0.651) of microfibrillar angles indicated that the character was under genetic control. And selection could be conducted effectively among clones and within clones. The variance analysis of transverse section tissue percentage include vessel percentage, fiber percentage and wood ray percentage of Populus tomentosa were perfected. All traits except vessel percentage were observed significant clonal differences at 0.05 level. The values of clone repeatability of vessel percentage and fiber percentage were 0.437 and 0.336 separately, and the values of clone repeatability of wood ray percentage was 0.711. This showed that genetic control for wood ray percentage is feasible.展开更多
文摘Variation of growth traits of progenies of twenty-three cross combinations in Populus was analysed,and genetic variation among parents was studied by Amplified Fragment Length Polymorphism(AFLP).The results showed that growth traits of progenies and molecular genetic distance(GD) among parents had considerable variation.Correlation and regression analysis between molecular genetic distances among parents and growth traits of progenies indicated that the relationship between GD and growth was linear equation in a certain range(0.024 9～0.368 1),and that the relationship was quadratic parabola equation in a wide range(0.024 9～0.531 4).If the genetic distance among parents in Populus would range from 0.19 to 0.36,the ultimate effect of hybridization could be achieved based on the established relationship between GD and growth.
文摘25 clones(6 trees from each clone) were sampled (aged 15 years) from clone test stand of Populus tomentosa. The fiber forms (fiber length, fiber width, ratio of fiber length and fiber width, fiber wall thinckness, fiber lumen diameter, ratio of 2 fiber wall thinckness and fiber lumen diameter, ratio of fiber lumen diameter and cell diameter) were analysed. Variance analysis showed that these 7 traits were significantly different among clones at 0.05 level. 2 characters, Fiber width and fiber lumen diameter, were strongly inherited, and others 5 traits were under moderate genetic control. The selection could be conducted effectively among clones. The variation analysis of microfibrillar angles showed that there was significantly difference among clones at 0.05 level. The clones repeatability (0.961) and single repeatability (0.651) of microfibrillar angles indicated that the character was under genetic control. And selection could be conducted effectively among clones and within clones. The variance analysis of transverse section tissue percentage include vessel percentage, fiber percentage and wood ray percentage of Populus tomentosa were perfected. All traits except vessel percentage were observed significant clonal differences at 0.05 level. The values of clone repeatability of vessel percentage and fiber percentage were 0.437 and 0.336 separately, and the values of clone repeatability of wood ray percentage was 0.711. This showed that genetic control for wood ray percentage is feasible.
