Professor and Louis P. Martini Endowed Chair in Viticulture, Department of Viticulture & Enology, UC Davis
Walker has been a faculty member of the Department of Viticulture and Enology since 1989, the same year he began breeding grapes.
Walker’s research program involves developing new rootstocks with resistance to fanleaf, dagger and root-knot nematodes and phylloxera. His lab studies include researching the genetics of resistance to these pests, their genetic diversity and aggressivity, and host/pest interactions of these pests with grape species. His lab is also actively involved in breeding table, raisin and wine grapes for resistance to Pierce’s disease and powdery mildew. Other lab activities include classical breeding and inheritance studies, the development of rapid resistance assays, field trials of promising rootstock and scion selections, DNA marker analysis and mapping, and genetic engineering.
Professor Walker serves as Chair of the Horticulture and Agronomy Graduate Group, which administers the M.S. degree in Viticulture and all applied plant programs.