Abstract
Forest tree improvement programs have become quite complex and program strategies and intensities vary dramatically around the world. It is often necessary to examine the reasons for each activity separately in order to ascertain how all steps fit together in a strategy aimed at achieving genetic gain. This paper establishes a conceptual framework that explains the purposes of the various activities of tree improvement and allows complicated program strategies to be easily conveyed. This conceptual model, called the breeding cycle, stresses why, not how, each activity is conducted. The breeding cycle turns around one time for each generation of breeding and is composed of various types of plant populations. Each plant population serves a role in the tree improvement program and is created form a preceding population in the cycle by an activity of the breeder.
Tree improvement concepts are explained and the roles of genetic test plantations are described in the context of the breeding cycle. This conceptual model is useful for foresters responsible for implementing tree improvement programs, for students and breeders trying to understand and compare divergent program strategies and for managers responsible for making investment decisions.
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References
Allard, R.W. 1960. Principles of Plant Breeding. John Wiley and Sons, New York, NY.
Bridgwater, F.E. & Squillace, A.E. 1986. Selection indexes for forest trees (pp. 17–20). In: Advanced Generation Breeding of Forest Trees. Southern Coop. Series Bull. 309. Louisiana Ag. Exp. Stn., Baton Rouge, LA.
Burdon, R.D. & Shelbourne, C.J.A. 1972. Breeding populations for recurrent selection: Conflicts and possible solutions. N.Z. J. For. Sci. 1:174–193.
Cotterill, P.P. 1984. A plan for breeding radiata pine. Silvae Genet. 33:84–90.
Dorman, K.W. & Zobel, B.J. 1973. Genetics of loblolly pine. USDA For. Serv. Res. Pap. WO-19, Washington, D.C.
Foster, G.S. 1986. Making clonal forestry pay: Breeding and selection for extreme genotypes, (pp. 582–590). In: Proc. IUFRO Conf. on Breeding Theory, Progeny Testing and Seed Orchards. October 13–17, Williamsburg, VA.
Fowler, D.P. 1976. Genetic variation influences tree improvement strategies. Pulp Pap. CAN 77:65–69.
Gladstone, W.T., Bean, P.M., Hughes, J.H. and Talbert, C.B. 1987. A challenge for tree improvement, (pp. 1–7). In: Proc. 19th South. For. Tree Improve. Conf. June 16–18, College Station, TX.
Gladstone, W.T. 1981. Customize or compromise-An alternative for loblolly, (pp. 200–204). In: Proc. 16th South. For. Tree Improve. Conf. May 26–29, Balcksburg, VA.
Goddard, R.E. 1980. The University of Florida Cooperative Genetics Research Program, (pp. 31–42). In: Proc. 15th North. Amer. Quant. For. Genet. Group Workshop. August 6–8, Coeur d'Alene, ID.
Kang, H. 1979 a. Designing a tree breeding system, (pp. 51–66). In: Proc. Seventeenth Meeting Canadian Tree Improvement Association. August 27–30, Gander, Newfoundland.
Kang, H. 1979 b. Long-term tree breeding, (pp. 66–72). In: Proc. 15th South. For. Tree Imp. Conf. June 19–21. Mississippi State Univ., Starkeville, MS.
Kang, H. 1982. Components of a tree breeding plan, (pp. 119–135). In: Proc. IUFRO Conf. On Breeding Strategies Including Multiclonal Varieties. September 6–10, Sensenstein, West Germany.
Lambeth, C.C., Dougherty, P.M.. Gladstone, W.T., McCullough, R.B. & Wells, O.O. 1984. Large-scale planting of North Carolina loblolly pine in Arkansas and Oklahoma: A case of gain versus risk. J. For. 82:736–741.
Lambeth, C.C., van, Buijtenen, J.P., Duke, S.D. & McCullough, R.B. 1983. Early selection is effective in 20-year-old genetic tests of loblolly pine. Silvae Genet. 32:210–215.
Libby, W.J. 1973. Domestication strategies for forest trees. Can. J. For. Res. 3:265–276.
Lindgren, D. 1986. How should breeders respond to breeding values?, (pp. 361–372). In: Proc. IUFRO Conf. on Breeding Theory, Progeny Testing and Seed Orchards. October 13–17, Williamsburg, VA.
Lowe, W.J. & van Buijtenen, J.P. 1981. Tree improvement philosophy and strategy for the Western Gulf Forest Tree Improvement Program, (pp. 43–50). In: Proc. 15th North Amer. Quant. For. Genet. Group Wrokshop. August 6–8, Couer d'Alene, ID.
McKinley, C.R. 1983. Objectives of progeny tests, (pp. 2–13). In: Progeny Testing of Forest Trees, Southern Coop. Series Bull. 275. Texas A & M Univ., College Station, TX, 77843.
Silen, R.R. & Wheat, J.G. 1979. Progressive tree improvement program in coastal Douglas-fir. J. For. 77:265–276.
Silen, R.R. 1966. A simple, progressive tree improvement program for Douglas-fir. USDA For. Serv. Res. Note PNW-45. Pac Northwest. For. and Range Exp. Stn., Portland, OR 13p.
Stoneycypher, R. & Arbez, M. 1976. Methods of selection, (pp. 31–46). In: Proc. IUFRO Conf. on Advanced Generation Breeding, Juny 14–18, Bordeaux, France.
Talbert, C.B. 1986. Multi-criterion index selection as a tool for operational tree improvement, (pp. 228–238). In: Proc. IUFRO Conf. on Breeding Theory, Progeny Testing and Seed Orchards. October 13–17, Williamsburg, VA.
Toda, R. 1964. A brief review and conclusions of the discussion on seed orchards. Silvae Genet. 13:1–4.
van Buijtenen, J.P. & Bridgwater, F. 1986. Mating and genetic test designs, (pp. 5–10). In: Advanced Generation Breeding of Forest Trees. Southern Coop. Series Bull. 309. Louisiana Ag. Exp. Stn., Baton Rouge, LA.
van, Buijtenen, J.P. and Namkoong, G. 1983. Mating designs, (pp. 7–13). In: Progeny Testing of Forest Trees. South. Coop. Series Bull. No. 275. Texas A&M Univ., College Station, TX.
van Buijtenen, J.P. 1975. Advanced Generation Breeding, (pp. 63–72). In: Proc. 13th South. For. Tree. Improve, Conf. June 10–11, Raleigh, N.C.
van Buijtenen, J.P. 1976. Mating designs, (pp. 11–27). In: Proc. IUFRO Joint Meeting on Advanced Generation Breeding. June 14–18, Bordeaux, France.
van Buijtenen, J.P. 1981. Strategies for advanced generation orchards, (pp.121–129). In: Proc. Eighteenth Meeting of the Canadian Tree Improvement Assoc. August 17–20, Duncan, BC, Can.
Weir, R.J. & Goddard, R.E. 1986. Advanced generation operational breeding programs for loblolly and slash pine, (pp. 21–26). In: Southern Coop. Series Bull. 309. Louisana Agric. Exp. Stn., Baton Rouge, LA, 70903.
Weir, R.J. 1980. North Carolina State Industry Cooperative Tree Improvement Program, (pp. 57–70). In: Proc. 15th North Amer. Quan. For. Gen. Workshop. August 6–8, Couer d'Alene, ID.
Wheat, J. and Silen, R. 1982. 1982 Progress Report for IFA-PNW Cooperative Tree Improvement Programs. Industrial For. Assoc., Portland, OR. 97295.
White, T., Flinchum, M., Rockwood, D., Kok, H. & Powell, G. 1986. Twenty-eighth Progress Report, Cooperative Forest Genetics Research Program. Dept. of For., Univ. of Florida, Gainesville, FL.
Wright, J.W. 1961. Progeny tests or seed orchards?. Recent Adv. Bot. 2:1681–1687.
Zobel, B. J. & Talbert, J. 1984. Applied Forest Tree Improvement. John Wiley and Sons, New York, NY.
Zobel, B.J., Weir, R.J. & Jett, J.B. 1972. Breeding methods to produce progeny for advanced-generation selection and to evaluate parent trees. Can. J. For. Res. 2:339–345.
Zobel, B.J. 1971. The genetic improvement of southern pines. Sci. Amer. 225:95–103.
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White, T.L. A conceptual framework for tree improvement programs. New Forest 1, 325–342 (1987). https://doi.org/10.1007/BF00031742
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DOI: https://doi.org/10.1007/BF00031742