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1	Disease resistance and productivity in genetically improved loblolly pine: Results from a resistance screening trial and a midrotation comparison of genetic improvement levels Goodfellow, Stephen W. 09 December 2022 (has links) Decades of tree improvement has resulted in genetic gains in loblolly pine productivity, form, and resistance to fusiform rust. The goal of this study was to advance the understanding and applied use of genetic improvement by analyzing inter- and intra-provenances hybrids’ rust resistance and evaluating midrotation performance of varying levels of genetically improved stock types. The first study compares 16 seedlots at the USDA Resistance Screening Center and evaluates rust resistance of controlled-pollinated inter- and intra-provenances crosses, and openpollinated seedlots from three provenances: Western Gulf, Atlantic Coastal, and Interior Piedmont. Post inoculation, one Coastal OP seedlot was resistant and ten of the seedlots were susceptible to the disease. The second study compares three levels of improved stock types: second-generation open-pollinated, controlled pollinated, and varietal material. After the fifteenth growing season, all three improved stock types were not significantly different from one another in defects, height, diameter, volume, and exhibited site index. loblolly controll mass pollinated open pollinated forestry tree breeding tree improvement coastal western gulf piedmont plant genetics Forest Sciences Genetics and Genomics Plant Sciences
2	A History of Place: Using Phytolith Analysis to Discern Holocene Vegetation Change on Sanak Island, Western Gulf of Alaska Wilbur, Cricket C. January 2013 (has links) No description available. Archaeology Botany Climate Change Conservation Earth Ecology Environmental Science Freshwater Ecology Geology Limnology Native Americans Natural Resource Management Paleobotany Paleoclimate Science Paleoecology Plant Biology Pollen Paleolimnology Phytoliths Phytolith Analysis Aleutian Islands Sanak Island Western Gulf of Alaska Stomata Maritime tundra Grasses Dicotyldons Arctic ecosystems Climate change Paleoenvironmental reconstruction Holocene Lake sediment

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Disease resistance and productivity in genetically improved loblolly pine: Results from a resistance screening trial and a midrotation comparison of genetic improvement levels

A History of Place: Using Phytolith Analysis to Discern Holocene Vegetation Change on Sanak Island, Western Gulf of Alaska