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Tree Improvement Cycle

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Presentation on theme: "Tree Improvement Cycle"— Presentation transcript:

1 Tree Improvement Cycle
Creating a Better Tree

2 Tree Improvement Application of knowledge to produce superior trees
Improvement can be made in: -Trees’ growth rate -Disease resistance -Stem, wood and/or fiber quality

3 Tree Selection Find “good” trees Collect their seeds or take cuttings
Cross bred them Test the offspring Select the best of the offspring Repeat Easy?

4 What is a “good” tree? Crown: Narrow; Short vs. height of tree; healthy Branches: small diameter Stem: Straight; low taper; high volume vs. neighbors; disease and/or insect resistant; high quality wood

5 Selection Select trees in natural stands based on physical characteristics; superior growth, form, reduce disease and/or insect damage.

6 Collect seeds or take grafts
To preserve the genetic material, seeds of the selected tree or twigs are collected to graft on to root stock.

7 Test Offspring Testing involves growing seedlings of each parent and comparing them to other selected seedlings to determine the capability of the parents to pass on their genetic superiority.

8 Breeding Breeders isolate young flowers of parent trees so that unwanted pollen can not contaminate the tree.

9 Seed Orchard Select the best of the offspring to establish a seed orchard Repeat the process

10 Time It takes 6-8 years before one receives useful results from testing About 10 years after a seed orchard is establish it will produce seed for reforestation


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