Table_1_Rose Rosette Disease Resistance Loci Detected in Two Interconnected Tetraploid Garden Rose Populations.docx

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.

由玫瑰丛矮埃玛病毒（Rose rosette emaravirus, RRV）引发的玫瑰丛矮病（Rose rosette disease, RRD），是美国园林月季产业的主要威胁之一。当前针对寄主植物抗RRV的遗传研究仍较为有限。本研究构建了两个相互关联的四倍体园林月季F₁双亲本作图群体，以开发高质量的四倍体月季连锁图谱，并借此定位到分布于连锁群（linkage groups, LGs）5、6、7上的抗RRD数量性状位点（quantitative trait loci, QTLs）。上述QTL单个可解释约18%~40%的表型方差，其中对部分抗性效应最强的位点位于LG5。绝大多数携带LG5 QTL的个体呈单剂量构型，仅2个个体为双剂量构型（推测由双减数分裂导致）。筛选抗性个体并明确相关候选区域，可为育种项目中开发用于标记辅助选择的诊断标记提供重要支撑。