Identification of QTLs for Reduced Susceptibility to Rose Rosette Disease in Diploid Roses
Resistance to rose rosette disease (RRD), a fatal disease of roses (<i>Rosa</i> spp.), is a high priority for rose breeding. As RRD resistance is time-consuming to phenotype, the identification of genetic markers for resistance could expedite breeding efforts. However, little is known ab...
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MDPI AG
2022-06-01
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| Online Access: | https://www.mdpi.com/2076-0817/11/6/660 |
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| author | Ellen L. Young Jeekin Lau Nolan B. Bentley Zena Rawandoozi Sara Collins Mark T. Windham Patricia E. Klein David H. Byrne Oscar Riera-Lizarazu |
| author_facet | Ellen L. Young Jeekin Lau Nolan B. Bentley Zena Rawandoozi Sara Collins Mark T. Windham Patricia E. Klein David H. Byrne Oscar Riera-Lizarazu |
| author_sort | Ellen L. Young |
| collection | DOAJ |
| description | Resistance to rose rosette disease (RRD), a fatal disease of roses (<i>Rosa</i> spp.), is a high priority for rose breeding. As RRD resistance is time-consuming to phenotype, the identification of genetic markers for resistance could expedite breeding efforts. However, little is known about the genetics of RRD resistance. Therefore, we performed a quantitative trait locus (QTL) analysis on a set of inter-related diploid rose populations phenotyped for RRD resistance and identified four QTLs. Two QTLs were found in multiple years. The most consistent QTL is <i>qRRV_TX2WSE_ch5</i>, which explains approximately 20% and 40% of the phenotypic variation in virus quantity and severity of RRD symptoms, respectively. The second, a QTL on chromosome 1, <i>qRRD_TX2WSE_ch1</i>, accounts for approximately 16% of the phenotypic variation for severity. Finally, a third QTL on chromosome 3 was identified only in the multiyear analysis, and a fourth on chromosome 6 was identified in data from one year only. In addition, haplotypes associated with significant changes in virus quantity and severity were identified for <i>qRRV_TX2WSE_ch5</i> and <i>qRRD_TX2WSE_ch1</i>. This research represents the first report of genetic determinants of resistance to RRD. In addition, marker trait associations discovered here will enable better parental selection when breeding for RRD resistance and pave the way for marker-assisted selection for RRD resistance. |
| first_indexed | 2024-03-09T22:48:41Z |
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| language | English |
| last_indexed | 2024-03-09T22:48:41Z |
| publishDate | 2022-06-01 |
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| series | Pathogens |
| spelling | doaj.art-b68afc5c65e34e7b837271cf231904f72023-11-23T18:24:51ZengMDPI AGPathogens2076-08172022-06-0111666010.3390/pathogens11060660Identification of QTLs for Reduced Susceptibility to Rose Rosette Disease in Diploid RosesEllen L. Young0Jeekin Lau1Nolan B. Bentley2Zena Rawandoozi3Sara Collins4Mark T. Windham5Patricia E. Klein6David H. Byrne7Oscar Riera-Lizarazu8Department of Horticultural Sciences, Texas A&M University, College Station, TX 77843, USADepartment of Horticultural Sciences, Texas A&M University, College Station, TX 77843, USADepartment of Integrative Biology, University of Texas at Austin, Austin, TX 78705, USADepartment of Horticultural Sciences, Texas A&M University, College Station, TX 77843, USADepartment of Entomology and Plant Pathology, Institute of Agriculture, University of Tennessee, Knoxville, TN 37996, USADepartment of Entomology and Plant Pathology, Institute of Agriculture, University of Tennessee, Knoxville, TN 37996, USADepartment of Horticultural Sciences, Texas A&M University, College Station, TX 77843, USADepartment of Horticultural Sciences, Texas A&M University, College Station, TX 77843, USADepartment of Horticultural Sciences, Texas A&M University, College Station, TX 77843, USAResistance to rose rosette disease (RRD), a fatal disease of roses (<i>Rosa</i> spp.), is a high priority for rose breeding. As RRD resistance is time-consuming to phenotype, the identification of genetic markers for resistance could expedite breeding efforts. However, little is known about the genetics of RRD resistance. Therefore, we performed a quantitative trait locus (QTL) analysis on a set of inter-related diploid rose populations phenotyped for RRD resistance and identified four QTLs. Two QTLs were found in multiple years. The most consistent QTL is <i>qRRV_TX2WSE_ch5</i>, which explains approximately 20% and 40% of the phenotypic variation in virus quantity and severity of RRD symptoms, respectively. The second, a QTL on chromosome 1, <i>qRRD_TX2WSE_ch1</i>, accounts for approximately 16% of the phenotypic variation for severity. Finally, a third QTL on chromosome 3 was identified only in the multiyear analysis, and a fourth on chromosome 6 was identified in data from one year only. In addition, haplotypes associated with significant changes in virus quantity and severity were identified for <i>qRRV_TX2WSE_ch5</i> and <i>qRRD_TX2WSE_ch1</i>. This research represents the first report of genetic determinants of resistance to RRD. In addition, marker trait associations discovered here will enable better parental selection when breeding for RRD resistance and pave the way for marker-assisted selection for RRD resistance.https://www.mdpi.com/2076-0817/11/6/660RosaemaravirusQTLvirus resistanceplant breeding |
| spellingShingle | Ellen L. Young Jeekin Lau Nolan B. Bentley Zena Rawandoozi Sara Collins Mark T. Windham Patricia E. Klein David H. Byrne Oscar Riera-Lizarazu Identification of QTLs for Reduced Susceptibility to Rose Rosette Disease in Diploid Roses Pathogens Rosa emaravirus QTL virus resistance plant breeding |
| title | Identification of QTLs for Reduced Susceptibility to Rose Rosette Disease in Diploid Roses |
| title_full | Identification of QTLs for Reduced Susceptibility to Rose Rosette Disease in Diploid Roses |
| title_fullStr | Identification of QTLs for Reduced Susceptibility to Rose Rosette Disease in Diploid Roses |
| title_full_unstemmed | Identification of QTLs for Reduced Susceptibility to Rose Rosette Disease in Diploid Roses |
| title_short | Identification of QTLs for Reduced Susceptibility to Rose Rosette Disease in Diploid Roses |
| title_sort | identification of qtls for reduced susceptibility to rose rosette disease in diploid roses |
| topic | Rosa emaravirus QTL virus resistance plant breeding |
| url | https://www.mdpi.com/2076-0817/11/6/660 |
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