V
Valerie M. Williamson
Researcher at University of California, Davis
Publications - 97
Citations - 8185
Valerie M. Williamson is an academic researcher from University of California, Davis. The author has contributed to research in topics: Gene & Root-knot nematode. The author has an hindex of 45, co-authored 94 publications receiving 7556 citations. Previous affiliations of Valerie M. Williamson include University of California.
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Journal ArticleDOI
The nematode resistance gene Mi of tomato confers resistance against the potato aphid
Magdalena Rossi,Fiona L. Goggin,Stephen B. Milligan,Isgouhi Kaloshian,Diane E. Ullman,Valerie M. Williamson +5 more
TL;DR: It is shown that Mi is expressed in leaves, that aphid resistance is isolate-specific, and that susceptible tomato transformed with Mi is resistant to the same aphid isolates as the original resistant lines.
Journal ArticleDOI
The root knot nematode resistance gene Mi from tomato is a member of the leucine zipper, nucleotide binding, leucine-rich repeat family of plant genes.
Stephen B. Milligan,John Bodeau,Jafar Yaghoobi,Isgouhi Kaloshian,Pim Zabel,Valerie M. Williamson +5 more
TL;DR: The Mi locus of tomato confers resistance to root knot nematodes, and three open reading frames were identified with similarity to cloned plant disease resistance genes, including Prf, a tomato gene required for resistance to Pseudomonas syringae.
Journal ArticleDOI
Nematode Pathogenesis and Resistance in Plants
TL;DR: Nematodes comprise a large phylum of animals that includes plant and animal parasites as well as many free-living species, and the Heteroderidae can be divided into two groups: the cyst nematodes, which include the genera Heterodera and Globodera; and the root-knot nematode, which is the most economic damage worldwide.
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Sequence and genetic map of Meloidogyne hapla: A compact nematode genome for plant parasitism
Charles H. Opperman,David McK. Bird,Valerie M. Williamson,Daniel S. Rokhsar,Mark Burke,Jonathan A. Cohn,John Cromer,Steve Diener,Jim Gajan,Steve Graham,Thomas D. Houfek,Qingli L. Liu,Therese Mitros,Jennifer E. Schaff,Reenah Schaffer,Elizabeth H. Scholl,Bryon Sosinski,Varghese P. Thomas,Eric Windham +18 more
TL;DR: Meloidogyne hapla is established as a tractable model plant-parasitic nematode amenable to forward and reverse genetics, and a complete genome sequence is presented that defines a platform to elucidate mechanisms of parasitism by what is the largest uncontrolled group of plant pathogens worldwide.
Journal ArticleDOI
The root-knot nematode resistance gene Mi-1.2 of tomato is responsible for resistance against the whitefly Bemisia tabaci.
TL;DR: The tomato gene Mi-1.2 is unique among characterized resistance genes in its activity against three very different organisms (root-knot nematodes, aphids, and whiteflies), making Mi a valuable resource in integrated pest management programs.