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Genotype-Environment Interaction in North Central United States

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Genetic and site effects have generally been stronger than genotype-site interaction in 8- to 12-year-old provenance and progeny tests of 11 species conducted in north central United States. However, in four species there were strong north-south interactions which were probably related to differences in winter temperature and hardiness. Many lesser interactions could be proved statistically in most experiments but might be artifacts and are of little practical significance because they cannot be interpreted. Purely statistical data on non-interpretable interactions are of little practical value but are the main reason for practicing replication within each of several test plantations. Ideal experiments may be those in which each seedlot is replicated at many different places but in which there is a minimum of replication within each plantation. Because of the scarcity of interpretable interactions, it is difficult to explain many of the genetic differences in terms of adaptation to modem climatic and site conditions. Forest Sci. 19:113-123.

Keywords: Heritability; adaptation; experimental design; provenance; selection

Document Type: Journal Article

Affiliations: Professor of Forestry, Michigan State University, East Lansing, Mich. 48823

Publication date: June 1, 1973

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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