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Customize or Compromise-An Alternative for Loblolly

Within the framework of broad recurrent selection programs, fine-tuning of genotype-site relationships will maximize genetic gain. Interactions evident in progeny, provenance and nursery tests suggest that individual specification of site conditions and cultural practices for many production-scale half-sib families will result in significant growth gains. Segregation of families or groups of families from cone harvest through the regeneration effort can enhance realized genetic gain and, in instances of orchard seed surpluses, permits an after-the-fact roguing of the maternal side of an orchard through preferential planting of the best families. Poorer performers may be used to advantage in other geographic areas, or not harvested.


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Author(s): William T. Gladstone

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1981

Section: Section 4: Seed Utilization and Seed Orchard Management