Distribution of Cereal Cyst Nematodes ( and ) in Eastern Washington State.

08:00 EDT 12th July 2019 | BioPortfolio

Summary of "Distribution of Cereal Cyst Nematodes ( and ) in Eastern Washington State."

Cereal cyst nematodes (CCN; and ), cause substantial worldwide yield loss in small grain cereals such as wheat, barley, and oat. was first detected in the United States in western Oregon in 1974 and had spread to northeast Oregon by the mid-1980s. Although was detected in eastern Washington in 1984, extensive infestations were not recognized until 2010. , first detected in Oregon in 2008, was found in eastern Washington in 2014. To gain more information about the distribution of these two species, an extensive survey was undertaken in eastern Washington, and methods were developed to distinguish species using DNA sequencing of single cysts. In this study, we surveyed 356 wheat and barley fields in eastern Washington from 2007 to 2017. CCN from the infested locations were identified to species level by sequencing the ribosomal internal transcribed spacers (ITS) and/or 28S ribosomal RNA (rRNA) genes. The sequences were compared in the GenBank database in the National Center for Biotechnology Information (NCBI) to identify species. The results show that is primarily confined to southern Whitman County, WA; and has a wider distribution across the higher precipitation annual cropping area of eastern Whitman County. Knowledge of species identification is critical for deployment of host resistance as an effective means of management, since resistance genes for one species of CCN may not be effective against the other.


Journal Details

This article was published in the following journal.

Name: Plant disease
ISSN: 0191-2917
Pages: PDIS10181881SR


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A plant genus of the family POLYGONACEAE that is used as a cereal grain. Although the seeds are used as cereal, the plant is not one of the cereal grasses (POACEAE).

Cysts formed from epithelial inclusions in the lines of fusion of the embryonic processes which form the jaws. They include nasopalatine or incisive canal cyst, incisive papilla cyst, globulomaxillary cyst, median palatal cyst, median alveolar cyst, median mandibular cyst, and nasoalveolar cyst.

State bounded by on the north by Canada, on the east by Idaho, on the south by Oregon, and on the west by the Pacific Ocean.

State bounded on the north by Canada, on the east by Montana and Wyoming, on the south by Nevada and Utah, and on the west by Oregon and Washington.

State bounded on the north by Washington, on the east by Idaho, on the south by California and Nevada, and on the west by the Pacific Ocean.

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