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Field Performance of Slash Pine from Fusiform Rust-Resistant Families

Six families of putatively fusiform-rust resistant slash pine (Pinus elliottii Engelm. var. elliottii) were planted in four consecutive years at three locations in south Mississippi, and fusiform rust infections were documented according to the calendar year in which they occurred. Each of 24 plots contained 80 trees--13 or 14 established trees of each family in a completely random arrangement. Rankings of the six families tested were highly variable in different trials that separated infection by year of occurrence. Every family ranked well in some trials and poorly in other trials. Much of the variation was apparently due to the low number of trees for computing percentage with infection, but there was some evidence to confirm that relative family performance was probably influenced by the local (plot) environment as well as by differences in the environment among locations.

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Author(s): R. C. Froelich

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1989

Section: Concurrent Session 3B