Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Genetics of growth rate in Quercus rubra: provenance and family effects by the early third decade in the North Central U.S.A.

Abstract

In 3 provenance trials established in Ohio, Indiana and Michigan in 1962-64, trees from seed originating at 43-46°N latitude (from the Mississippi River to western Maine) had a consistently higher growth rate than trees of other origins. Seed sources from farther north (including southern Canada), south or west were less promising, although some sources were above average. About 16% of measured variance in height growth was attributable to provenance and 7% to family. Age × age correlations in the Ohio trial showed that selection for growth rate was not possible at age 8, probably partly because of early mortality and rabbit injury. The best provenances in terms of growth rate could be selected at age 14, but not the best individual trees. Improvements in technology for red oak plantation establishment are thought to make early selection in red oak more feasible.