The Influence of Inbreeding Depression and Hybrid Superiority on Wood Property and Tree Growth of Eucalypt  

桉树纸浆材生长、材性指标近交退化和杂种优势分析(英文)

作　　者：鲍甫成[1] 罗建举[2] 

机构地区：[1]中国林业科学研究院,北京100091 [2]广西大学林学院,南宁530001

出　　处：《Forestry Studies in China》2002年第2期61-67,共7页中国林学（英文版）

摘　　要：With F1 of self pollinated Eucalyptus urophylla, F1 of inter tree pollinated E.urophylla, F1of open pollinated E.urophylla and F1 of E.urophylla×grandis as materials,inbreeding depression and hybrid superiority in growth and wood traits are analyzed and discussed.The results are as follows.①There was a regularity for E.urophylla that F1 of self pollinated was subjected to more intense depression than F1 of open pollinated,and growth traits showed more signifcant depression than wood traits.②As to F1 of self pollinated E.urophylla, height,DBH and volume showed significant or extremely significant depression,while water content of green wood,wood density and bark thickness showed no significant depression.③As to F1 of open pollinated E.urophylla, height,DBH and volume showed depression to a certain degree,but not significant;Here again,water content of green wood,wood density and bark thickness showed no significant depression.④F1 of E.urophylla×grandis showed significant hybrid superiority in height,DBH and volume,but the hybrid superiority percentage of different cross pairs varied greatly;It showed no hybrid superiority in water content of green wood,wood density and fiber length;Its bark thickness and content of 1% NaOH extractives decreased evidently.With F1 of self pollinated Eucalyptus urophylla, F1 of inter tree pollinated E.urophylla, F1of open pollinated E.urophylla and F1 of E.urophylla×grandis as materials,inbreeding depression and hybrid superiority in growth and wood traits are analyzed and discussed.The results are as follows.①There was a regularity for E.urophylla that F1 of self pollinated was subjected to more intense depression than F1 of open pollinated,and growth traits showed more signifcant depression than wood traits.②As to F1 of self pollinated E.urophylla, height,DBH and volume showed significant or extremely significant depression,while water content of green wood,wood density and bark thickness showed no significant depression.③As to F1 of open pollinated E.urophylla, height,DBH and volume showed depression to a certain degree,but not significant;Here again,water content of green wood,wood density and bark thickness showed no significant depression.④F1 of E.urophylla×grandis showed significant hybrid superiority in height,DBH and volume,but the hybrid superiority percentage of different cross pairs varied greatly;It showed no hybrid superiority in water content of green wood,wood density and fiber length;Its bark thickness and content of 1% NaOH extractives decreased evidently.

关 键 词：inbreeding depression hybrid superiority self  pollination open  pollination intra  species hybridization inter  species hybridization 

分 类 号：S792.39[农业科学—林木遗传育种]