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Revising the use of age-age correlation for conifer tree breeding in Alberta

Description

This paper describes an attempt to develop correlation prediction equations using data from Alberta species grown in the Alberta environment. It changes the form of the equation used by Lambeth by... More ≫

Description

This paper describes an attempt to develop correlation prediction equations using data from Alberta species grown in the Alberta environment. It changes the form of the equation used by Lambeth by inputting the age difference between measurement and rotation ages as a predictor variable as opposed to an age ratio that Lambeth uses, which inadvertently equates the latest field measurement to a rotation age measurement. it should be noted that this paper is not intended to increase the size of the age-age correlation compared to what could be obtained by Lambeth. it is only intended to provide an empirical procedure of obtaining a correlation that is biologically meaningful and partly related to the species and trials for which the genetic gain is being sought.

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Surveys of damage agents affecting young tree genetics research plantations and seed orchards in Alberta and a summary of control treatments

Description

The results of the surveys reported here provide a summary of the biotic and abiotic agents affecting cones, seedlings and trees, gives a distributional summary of damage agents according to... More ≫

Description

The results of the surveys reported here provide a summary of the biotic and abiotic agents affecting cones, seedlings and trees, gives a distributional summary of damage agents according to plantation sites established within the province up to 1994, and indicates the relative importance of each agent. The report also provides a listing of unpublished technical reports that resulted from the work described here and can be referred to for further details where necessary.

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Patterns of optimal growth for white spruce provenances in Alberta

Description

This paper describes the pattern of genetic variation for growth potential among white spruce provenances in Alberta. It uses total height and diameter at breast height at 27-years from seed to... More ≫

Description

This paper describes the pattern of genetic variation for growth potential among white spruce provenances in Alberta. It uses total height and diameter at breast height at 27-years from seed to identify provenance differences in relation to latitude and elevation of weed origin. Latitude and elevation are the main variables that adequately describe climatic variability in Alberta.

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Patterns of optimal growth for lodgepole pine provenances in Alberta

Description

This report describes results from measurements of 15 year height and diameter at breast height made on a series of provenance trials comprised of 23 Alberta populations planted on 0 test sites... More ≫

Description

This report describes results from measurements of 15 year height and diameter at breast height made on a series of provenance trials comprised of 23 Alberta populations planted on 0 test sites across the province. Although currently the age of these trials ranges from 19 to 24, only 15 year data for height and diameter are available for all trials.

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