Science Posters

Globodera in the U.S.

A Spatial Point Pattern Analysis of the Potato Cyst Nematode Globodera pallida in Southern Idaho

A Spatial Point Pattern Analysis of the Potato Cyst Nematode Globodera pallida in Southern Idaho

Spatial point pattern analysis used to understand the intensity and directionality of Globodera pallida (the pale cyst nematode) in fields in southern Idaho.

PDF   Presented at SON Conference, August 2017


Globodera Resistance Development

Molecular Characterization of the Expansin gene in Globodera pallida and Globodera ellingtonae

Molecular Characterization of the Expansin gene in Globodera pallida and Globodera ellingtonae

Potato cyst nematodes (PCN) are serious pests of potato worldwide. Globodera pallida is a quarantine pest in the United States and found only in Idaho.  Globodera ellingtonae, a new species of cyst nematode has a biotrophic relationship with the host plant and can reproduce on potato.  Expansin genes present in nematodes and in potato are associated with several plant metabolic and parasitic functions.  For nematodes, expansin has been shown to suppress defense responses, and may be important in syncytium formation. In plants, expansin is crucial to cell growth, emergence of root hairs, and other developmental processes where cell wall loosening occurs. Therefore, the identification and experimental validation of this target gene could help to develop novel management practices against PCN.

PDF   Presented at SON Conference, August 2017


Screening potato breeding clones and varieties for resistance to three potato cyst nematode species

Screening potato breeding clones and varieties for resistance to three potato cyst nematode species

Two species of potato cyst nematodes, Globodera rostochiensis, and G. pallida, are found in the United States. Potato is also a host for a newly described Globodera species, G. ellingtonae. All three Globodera spp. were used in this study to evaluate resistance in 22 potato breeding clones and varieties. Each clone was replicated four to five times using similar methodologies conducted in two replicated experiments with each nematode species. Three entries had high resistance to all three cyst nematodes. Seven entries had resistance to G. ellingtonae and G. rostochiensis. There was close alignment with resistance to G. ellingtonae and G. rostochiensis, suggesting that the significant effort to incorporate resistance to G. rostochiensis may provide twice the benefit.

PDF   Presented at Potato Expo, January 2017


Characterization of Effector Genes from Globodera Pallida in Potato Plants

Characterization of Effector Genes from Globodera Pallida in Resistant and Susceptible Potato Plants

Potato cyst nematodes (PCN) are some of the most economically important pests of potato. Globodera pallida was first detected in the United States in Idaho in April 2006. Nematode secretions (effector genes) are the first signals perceived by the plant, and affect the host defense response, facilitates the second-stage (J2) penetration and development in the host plant.

PDF   Presented at: SON/ONTA Conference, July 2016.