Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Polinko, Adam D.
Committee Member
Dougherty, Phil
Committee Member
Poudel, Krishna P.
Date of Degree
12-9-2022
Document Type
Graduate Thesis - Open Access
Major
Forestry
Degree Name
Master of Science (M.S.)
College
College of Forest Resources
Department
Department of Forestry
Abstract
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.
Recommended Citation
Goodfellow, Stephen W., "Disease resistance and productivity in genetically improved loblolly pine: Results from a resistance screening trial and a midrotation comparison of genetic improvement levels" (2022). Theses and Dissertations. 5641.
https://scholarsjunction.msstate.edu/td/5641