Readily available resources across sites and genotypes result in greater aboveground growth and reduced fine root production in Pinus taeda

•11-year-old loblolly pines with higher aboveground growth increments had lower fine root production.•Loblolly pines in Brazil had greater initial fine root biomass than those in the native range.•Larger trees did not necessarily produce more fine roots or have higher rates of root turnover.•No relationship was found between fine root production and leaf biomass.