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Heritability and Expected Gain Estimates for Traits of Scotch Pine Christmas Tree Seed Sources

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Abstract:

Forty-five full-sib families of Scotch pine (Pinus sylvestris L.) from an incomplete factorial mating design were planted in northeastern Kansas in 1981. The trees were evaluated in 1986 for survival, height growth, crown width, taper (crown width/height), number of stems per tree, the presence or absence of stem crooks, and the number of full faces. Needle length and needle color were measured at a consistent location on each tree in December 1987. Individual tree heritabilities were high; 49.68% for taper, 61.64% for crown width, 66.83% for height, and 71.46% for needle length. Estimated genetic gains showed that rapid improvements through selection are possible for these four traits. Combined selection consistently had the highest percentage gain and is the recommended selection procedure. Genetic correlation indicated that taper is negatively correlated with height (-0.651). Therefore, because of the commercial importance of form, selection for rapid height growth should not be the emphasis in future breeding efforts. West. J. Appl. For. 7(3):82-86.

Document Type: Journal Article

Affiliations: Department of Forestry, Kansas State University, Manhattan, KS 66506

Publication date: July 1, 1992

More about this publication?
  • 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 Western Journal of Applied Forestry covers the western United States, including Alaska, and western Canada; WJAF will also consider manuscripts reporting research in northern Mexico that has potential application in the southwestern United States.
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