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Field-Grown Mir156 Transgenic Switchgrass Reproduction, Yield, Global Gene Expression Analysis, And Bioconfinement, Chelsea R. Johnson, Reginald J. Millwood, Yuhong Tang, Jiqing Gou, Robert W. Sykes, Geoffrey B. Turner, Mark F. Davis, Yi Sang, Zeng-Yu Wang, C. Neal Stewart Jr
Field-Grown Mir156 Transgenic Switchgrass Reproduction, Yield, Global Gene Expression Analysis, And Bioconfinement, Chelsea R. Johnson, Reginald J. Millwood, Yuhong Tang, Jiqing Gou, Robert W. Sykes, Geoffrey B. Turner, Mark F. Davis, Yi Sang, Zeng-Yu Wang, C. Neal Stewart Jr
Plant Sciences Publications and Other Works
Background
Genetic engineering has been effective in altering cell walls for biofuel production in the bioenergy crop, switchgrass (Panicum virgatum). However, regulatory issues arising from gene flow may prevent commercialization of engineered switchgrass in the eastern United States where the species is native. Depending on its expression level, microRNA156 (miR156) can reduce, delay, or eliminate flowering, which may serve to decrease transgene flow. In this unique field study of transgenic switchgrass that was permitted to flower, two low (T14 and T35) and two medium (T27 and T37) miR156-overexpressing ‘Alamo’ lines with the transgene under the control of the …