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Zucchini yellow mosaic virus resistance in cucumber

Cucumber (Cucumis sativus) production is negatively affected by Zucchini yellow mosaic virus (ZYMV). Three sources of ZYMV resistance have been commercially deployed and all three resistances are conditioned by a single recessive gene.

A vacuolar protein sorting–associated protein 4-like (VPS4-like) gene has been proposed as a candidate for ZYMV resistance from cucumber line A192-18. We analyzed the genomic region across the VPS4-like gene for three independent sources of ZYMV resistance in cucumber (A192-18, Dina-1, and TMG-1) and identified three haplotypes across the coding region and considerable variation in the introns.

However, the haplotypes in the coding regions of the VPS4-like gene of A192-18, Dina-1, and TMG-1 encode the same protein sequence, revealing the genetic uniformity for ZYMV resistance from diverse germplasm sources.

Access the full study at HortScience.