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Fusiform Rust in Crosses Among Resistant and Susceptible Loblolly and Slash Pines

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Progenies from a half-diallel cross among six loblolly pines (Pinus taeda L.) and another among six slash pines (P. elliottii Engelm. var. elliottii) were field-tested in central Georgia for fusiform-rust (Cronartium quercuum [Berk.] Miyabe ex Shirai f. sp. fusiforme) resistance. Three of each set of six parents were rated resistant (R) and three susceptible (S) to the fungus relative to check lots in previous progeny tests. For both species, relative susceptibility of the three types of progenies at age 5 years was R x R < R x S < S x S. The R x R and R x S progenies in slash pine had considerably less infection than did the same types of progenies in loblolly pines. All S x S progenies were heavily infected. Heritability estimates for percentage infection and average galls per tree indicated that in these progenies, family selection should be based on percentage infection for slash pine and galls per tree for loblolly pine. South. J. Appl. For. 13(4):174-177.
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Document Type: Journal Article

Affiliations: USDA Forest Service, Southeastern Forest Experiment Station, Dry Branch, GA 31020

Publication date: 1989-11-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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