TY - JA AU - Crespo-Herrera,L.A. AU - Singh,R.P. AU - Reynolds,M.P. AU - Huerta-Espino,J. TI - Genetics of greenbug resistance in synthetic hexaploid wheat derived germplasm SN - 1664-462X PY - 2019/// CY - Switzerland PB - Frontiers KW - Wheat KW - AGROVOC KW - Genetics KW - Pest resistance KW - Schizaphis graminum KW - Tolerance KW - Genes N1 - Peer review; Open Access; WC; FP3 N2 - The greenbug, Schizaphis graminum Rondani, significantly reduces wheat, Triticum aestivum L., grain yields if not controlled. Host plant resistance (HPR) can protect yield, is environmentally friendly and easy to use. Our objectives were to: (1) identify genomic regions associated with S. graminum resistance in a recombinant inbred line (RIL) population derived from a cross of “Sokoll” (resistant) and “Weebill1” (moderately susceptible), (2) evaluate Sokoll derived breeding germplasm for resistance, and (3) conduct allelism tests between Sokoll and sources carrying resistance genes Gba, Gbb, and Gbd. Resistance was measured quantitatively and qualitatively using a SPAD meter and visual assessments, respectively. We identified a large effect resistance gene on chromosome arm 7DL of Sokoll, herein referred as GbSkl, which contributed up to 24% of the phenotypic variation. Other minor QTL on chromosomes 2B, 3A, and 7B were also identified. The QTL on 2B and 3A originated from Weebill1. Of the Sokoll derived germplasm, 13% displayed resistance. Allelism tests indicated that GbSkl could be allelic or tightly linked to the temporarily designated genes Gba, Gbb, and Gbd. Utility of SPAD to determine quantitative variation in resistance phenotyping is demonstrated and breeding efforts are underway to transfer the resistance from Sokoll to new CIMMYT elite germplasm UR - https://hdl.handle.net/10883/20241 DO - https://doi.org/10.3389/fpls.2019.00782 T2 - Frontiers in Plant Science ER -