SCRI Project Updates

IYSV & Thrips Tolerance


“Ensuring U.S. Onion Sustainability: Breeding and Genomics to Control Thrips and Iris yellow spot virus”


Project Director – Dr. Mike Havey at


[ Supported in Part by USDA-NIFA-SCRI Project No. 2008-04804 ]



Goal:  Establish collaborative research among growers, extensionists, pathologists, and breeders to identify, validate, and deliver resistances to thrips and thrips-vectored Iris yellow spot virus (IYSV) in relation to the following objectives:


·   Extension – Identification of resistances to thrips and IYSV; Validation of phenotypes and distribution of selected germplasms;  Cost-benefit estimates for thrips and IYSV resistances.


·  Research – Biological diversity and inoculation protocols for IYSV; Identification of SNPs in expressed onion sequences; Production of a high throughput genotyping platform and a high-density genetic map of onion; Association of SNPs with glossy-type foliage and/or thrips and IYSV resistances.


·  Outreach – Outreach to the onion community; Development of web-based bioinformatic and educational resources; Undergraduate and graduate student training.

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