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Computer modeling of a sublining breeding system

Many tree breeding programs have adopted some form of multiple population strategy (sublining) to manage inbreeding. Many questions arise about how these populations should be constructed and managed. Among these are the questions of how individuals should be assigned to sublines and how selection should be done within and among sublines. Computer simulation of a sublining breeding strategy suggests that: (1) selecting the best individual from the four best families (self or outcross) ranked on expected breeding values is an alternative that will give good genetic gains and result in relatively moderate rates of increase in coancestry within sublines; (2) assigning parents to sublines at random or disassortatively rather than by positive assortment will increase within-subline genetic variance and result in greater expected genetic gains.


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Author(s): Floyd E. Bridgwater, W. C. Woodbridge, M. F. Mahalovich

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1993

Section: Concurrent Session 7: Breeding and Progeny Testing