2026-09-20T18:52:24Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/85367 2023-07-11 col_2142_5131 col_2142_14826 com_2142_5130 com_2142_8913 com_2142_8903

Hu, Feng Sheng Paige, Ken N. Anderson, Lynn Lorraine 2015-09-25T22:42:33Z 2015-09-25T22:42:33Z 10000-01-01 2006 2006 Plant response to climate change can occur through a variety of mechanisms including population migration and phenotypic evolution. The effects of migration are often preserved in genetic patterns of contemporary forests, and can include genetic drift during population fragmentation as well as genetic bottlenecks during founder events. Besides migration, populations often change phenotypically in response to shifting climates. In this study I quantify genetic and morphological patterns of central and western North American white spruce populations. Specifically I have (1) provided evidence supporting Hulten's long standing hypothesis that ice-free areas of Beringia served as northern refugia for arctic and boreal biota during the last Quaternary glaciation using cpDNA markers, (2) provided evidence for multiple refugia in Alaska and uncovered the roles of gene flow and drift in structuring the patterns we see today and (3) teased apart the controlling mechanisms behind morphological expression (genetics, environment, or genetic x environmental interactions) in traits by comparing needle morphologies of common garden and naturally grown individuals. Made available in DSpace on 2015-09-25T22:42:33Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3250207.pdf: 2763108 bytes, checksum: 5a344e78d0044a756996a300c9068016 (MD5) Previous issue date: 2006 Embargo set by: Seth Robbins for item 86648 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 79 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006. http://hdl.handle.net/2142/85367 (MiAaPQ)AAI3250207 eng Biology, Ecology Genetic and Morphological Analyses of White Spruce in North America text Biology Biology University of Illinois at Urbana-Champaign Dissertation Ph.D.