Genetic dissection of stem and leaf rachis prickles in diploid rose using a pedigree-based QTL analysis.

Introduction: Prickles are often deemed undesirable traits in many crops, including roses ( sp.), and there is demand for rose cultivars with no or very few prickles. This study aims to identify new and/or validate reported quantitative trait loci (QTLs) associated with stem and leaf rachis prickle density, characterize the effects of functional haplotypes for major QTLs, and identify the sources of QTL-alleles associated with increased/decreased prickle density in roses.

Pedigree-based QTL analysis of flower size traits in two multi-parental diploid rose populations.

Rose ( spp.) is one of the most economically important ornamental species worldwide. Flower diameter, flower weight, and the number of petals and petaloids are key flower-size parameters and attractive targets for DNA-informed breeding.

QTL mapping and characterization of black spot disease resistance using two multi-parental diploid rose populations.

Black spot disease (BSD) () is the most common and damaging fungal disease in garden roses (.). Although qualitative resistance to BSD has been extensively investigated, the research on quantitative resistance lags behind.

Pedigree-based analysis in multi-parental diploid rose populations reveals QTLs for cercospora leaf spot disease resistance.

Cercospora leaf spot (CLS) () is a major fungal disease of roses ( sp.) in the southeastern U.S.