Breeding Strategy for the First-Generation of Pinus taeda in the Northeast Region of Argentina

A strategy for the Genetic Tree Improvement Cooperative of the northeast region of Argentina was developed to start with a broad genetic base to ensure maximum genetic gain in the long-term as well as provide insurance against new diseases or traits that may become important in the future. The breeding strategy for the first-generation is simple, cost-effective and yet as powerful as possible, using well-known technology for the species. The primary objective is to make near-optimal genetic gain in two traits (volume growth and straightness). At the same time, the strategy is flexible enough to permit each member to pursue traits of special interest. Also, it will provide for mixing and interchange of alleles among many sources and types of selections (different provenances, plantation selections, backward selections). The aim is to produce, in one or two generations of breeding, a well-adapted and genetically improved land race for Argentina that combines the best alleles from the many different types of selections and sources. The strategy relies on use of open-pollinated seed from each selection for the firstgeneration, but will permit open pollination or control pollination for breeding and testing in the second-generation. The main breeding population will be composed of 600 selections and sub-divided in twelve unrelated lines of 50 open-pollinated families in each line.

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Author(s): Mirta N. Baez, Timothy L. White

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1997

Section: Contributed Presentations: Full Papers