Rose Rosette Disease Resistance Loci Detected in Two Interconnected Tetraploid Garden Rose Populations

Jeekin Lau; Ellen L Young; Sara Collins; Mark T Windham; Patricia E Klein; David H Byrne; Oscar Riera-Lizarazu

doi:10.3389/fpls.2022.916231

Rose Rosette Disease Resistance Loci Detected in Two Interconnected Tetraploid Garden Rose Populations

Front Plant Sci. 2022 Jul 7:13:916231. doi: 10.3389/fpls.2022.916231. eCollection 2022.

Authors

Jeekin Lau¹, Ellen L Young¹, Sara Collins², Mark T Windham², Patricia E Klein¹, David H Byrne¹, Oscar Riera-Lizarazu¹

Affiliations

¹ Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States.
² Department of Entomology and Plant Pathology, University of Tennessee Institute of Agriculture, Knoxville, TN, United States.

Abstract

Rose rosette disease (RRD), caused by the Rose rosette emaravirus (RRV), is a major threat to the garden rose industry in the United States. There has been limited work on the genetics of host plant resistance to RRV. Two interconnected tetraploid garden rose F₁ biparental mapping populations were created to develop high-quality tetraploid rose linkage maps that allowed the discovery of RRD resistance quantitative trait loci (QTLs) on linkage groups (LGs) 5, 6, and 7. These QTLs individually accounted for around 18-40% of the phenotypic variance. The locus with the greatest effect on partial resistance was found in LG 5. Most individuals with the LG 5 QTL were in the simplex configuration; however, two individuals were duplex (likely due to double reduction). Identification of resistant individuals and regions of interest can help the development of diagnostic markers for marker-assisted selection in a breeding program.

Keywords: Phyllocoptes fructiphilus; Rosa; Rose rosette emaravirus; emaravirus; eriophyid mite; quantitative trait loci; rose rosette virus.