. 1979 Research accomplishments : forests for our needs. Forests and forestry Research United States. Timber Management. Tree breeding strategies using multiple populations will allow high genetic improve- ment in trees. SE 40 Tree Breeding Strategies Scientists at the Southeastern Forest Experiment Station are studying the highly specialized field of quantitative genetics. They are concerned about the complex problems associated with breeding designs and strategies inherent in long-term tree breeding programs for improvement of multiple traits. A system of tree breeding using multiple populat
. 1979 Research accomplishments : forests for our needs. Forests and forestry Research United States. Timber Management. Tree breeding strategies using multiple populations will allow high genetic improve- ment in trees. SE 40 Tree Breeding Strategies Scientists at the Southeastern Forest Experiment Station are studying the highly specialized field of quantitative genetics. They are concerned about the complex problems associated with breeding designs and strategies inherent in long-term tree breeding programs for improvement of multiple traits. A system of tree breeding using multiple populations has been shown to be feasible. By dividing breeding populations into subunits, re- searchers have found that more genetic gain can be achieved than by using a single breeding population of comparable size. When the future is uncertain, as it generally is in forestry because of the long gen- erational span, selection for different trait combinations or site con- ditions can be undertaken simultaneously by selecting for different responses among the subunits. Using this approach, tree breeders can deploy multiple populations in several directions around combinations of high predicted future value. This practice will allow high immediate genetic improvement, guard against selection of improper direction, and provide genetic flexibility and variation in the tree breeding population for many generations in the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Forest Service. [Washington, D. C. ?] : U. S. Dept. of Agriculture, Forest Service
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