Analysis of growth difference of 3-year-old Idesia polycarpa seedlings from different provenances
In order to screen out the provenances of Idesia polycarpa with excellent early growth traits,the 3-year-old seedlings of 7 provenances of Idesia polycarpa were taken as the research objects in this article.The growth indexes such as seedling height,ground diameter,crown width and biomass were measured,and the genetic variation,multiple comparison,correlation and membership function analysis of each trait were analyzed.The results showed that the variation coefficient of each growth trait of Idesia polycarpa from different provenances ranged from 31.11％to 49.82％,all of which were larger than 20％and belonged to moderate variation,indicating that the growth traits of Idesia polycarpa from different provenances had great differences.The multiple comparison of growth traits of Idesia polycarpa showed that there were significant differences in ground diameter,seedling height,height-diameter ratio,aboveground biomass,underground biomass,crown width and root-shoot ratio of Idesia polycarpa seedlings from different provenances(P＜0.05).According to the correlation analysis,there was a significant positive correlation between seedling height and underground biomass and crown width(P＜0.01).There were rich genetic variations in the growth traits of different provenances of Idesia polycarpa,which was also the reason for the wide distribution and rich variation of Idesia polycarpa.Through membership function and multiple comparison,it could be concluded that Ganzhou provenance and Jinggangshan provenance grew well in the early stage of southern hilly area and could be used as excellent provenances in this area.
万方数据
维普
