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Susceptibility of parent and interspecific F1 hybrid pine trees to tip moth damage in a coastal North Carolina planting

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Abstract:

Tip moth damage among families of parent pine species and their interspecific F1 hybrids was quantitatively assessed in a coastal planting in North Carolina. Three slash pine (Pinus elliotti var. elliotti Engelm.), two loblolly pine (Pinus taeda L.), and four interspecific F1 hybrid pine families were used. The F1 hybrids were as susceptible to damage by Nantucket pine tip moth (Rhyacionia frustrana (Comst.)), as was their susceptible loblolly pine parent. Their phenotypes support a dominant or partially dominant mode of inheritance for susceptibility. The phenotype of one slash pine family was not statistically different from the phenotypes of the loblolly and F1 hybrid pines. The high susceptibility of that one slash pine family appeared to be intrinsic, even though slash pine is considered resistant to tip moth damage. Tip moth damage on the two other slash pine families was significantly lower.

Les dommages causés par le perce-rameau du pin parmi les familles d'espèces de pin, chez les parents et leurs hybrides interspécifiques F1, ont été mesurés dans une plantation côtière de la Caroline du Nord. Trois familles de pin de Floride (Pinus elliotti var. elliotti Engelm.), deux familles de pin à encens (Pinus taeda L.) et quatre familles d'hybrides interspécifiques F1 ont été utilisées. Les hybrides F1 étaient aussi susceptibles aux dommages causés par le perce-rameau du pin (Rhyaciona frustana (Comst.)) que leurs parents également susceptibles. Leur phénotype possède un mécanisme d'héritabilité dominant ou partiellement dominant pour la susceptibilité. Le phénotype d'une famille de pin de Floride n'était pas statistiquement différent des phénotypes des pins à encens et des hybrides F1. La susceptibilité élevée de cette famille de pin de Floride apparaissait intrinsèque, même si le pin de Floride est considéré comme résistant au perce-rameau. Les dommages causés par le perce-rameau étaient significativement plus faibles sur les deux autres familles de pin de Floride.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: 2001-05-01

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  • Published since 1971, this monthly journal features articles, reviews, notes and commentaries on all aspects of forest science, including biometrics and mensuration, conservation, disturbance, ecology, economics, entomology, fire, genetics, management, operations, pathology, physiology, policy, remote sensing, social science, soil, silviculture, wildlife and wood science, contributed by internationally respected scientists. It also publishes special issues dedicated to a topic of current interest.
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