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The Study on Major Character Variation of Torreya Grandis in Natural Population

Author: LiYang
Tutor: YaoXiaoHua
School: Chinese Academy of Forestry
Course: Silviculture
Keywords: Torreya grandis Character Variation
CLC: S664.5
Type: Master's thesis
Year: 2009
Downloads: 47
Quote: 1
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Abstract


Torreya grandis is a Tertiary relict plant, Taxaceae Torreya is the case of plants, originating in China, Chinese unique economic valuable tree species, famous dried nuts trees.the same as the case of other species,Torreya grandis has been in the majority of wild or semi-wild state.Study on orderliness of main characters variation of Torreya grandis Fort.ex Lindl.The results are as follows: There are differences in apiece characters of Torreya grandis Fort.ex Lindl. among and within strains within habitats and among habitats.Torreya grandis tree traits had different degrees of variation in producing area.Tree height, stem high, high crown, diameter, crown width, tree height-diameter ratio, height- crown ratio, tree diameter crown traits has different degrees of variation in producing area.tree height, stem high, high crown, diameter at breast height, tree height-diameter ratio, height- crown ratio, tree crown diameter ratio were extremely significant level of difference among producing areas.the differences of Crown was not significant among producing areas.Torreya grandis branch characters were different degrees of variation in origin.Coefficient of variation from small to big production in the order as follows: branch-shaped index, branch length, branch diameter, leaf number, leaf density, branch angle. Production traits between the branches of the branch diameter, number of leaves, branches and leaf-shaped density index, the difference between production reached significant levels, shoot length, reaching a significant level, branching angle, the difference was not significant.Torreya grandis flowering period from late March to late April, the flowering period is not different between the origin.Torreya grandis flowering capacity of different parts of branches has different degrees of variation in producing area. Wild origin in various flowering Chinese Torreya several main branch, the number of flowering branches, the number of Acremonium bloom, flowering lateral branches few, the total number of flowering branches, such as differences in traits are extremely significant level. Coefficient of variation for the descending order of number of Acremonium flowering, flower number of main branch, the number of flowering branches, the number of flowering lateral branches, the total number of flowering branches.Torreya grandis seed production traits has different degrees of variation in producing area. Origin of all characters between the coefficient of variation is not very different from each other. Fuyang values of the mutation were significantly lower than the Yixian and Jiande similar value. Between production traits in origin there are different degrees of variation. The volume of seed production per plant, nut plant production, plant production kernel, unit canopy seed production, nut production crown units, unit production crown kernel 6 traits the difference between the origin reached a significant level.Seeds of Torreya major components of fatty acid composition as follows: linoleic acid, oleic acid and palmitic acid, the three components of the total fatty acids accounted for more than 70%, to a lesser extent stearic acid, linolenic acid, arachidic acid and acid gondo . One main component of fatty acid composition in place within the linoleic acid, oleic acid, palmitic acid, stearic acid, linolenic acid, arachidic acid and acid gondo there are varying degrees of variation. Major components of fatty acid composition were different degrees of variation in the place of production.Stearic acid, palmitic acid, oleic acid, linoleic acid, linolenic acid, arachidic acid, acid in the production gondo the difference between the level was extremely significant.Through the correlation analysis the actual traits of Torreya grandis seed,The results show that the Torreya grandis characters were all varying degrees of correlation within and among origin.

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CLC: > Agricultural Sciences > Gardening > Fruit trees gardening > Nuts (shell fruit ) > Torreya
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