Articles
Development of genetic analyses for resistance breeding in cultivated rose
Article number
1461_6
Pages
43 – 56
Language
English
Abstract
Roses are beautiful and delicate flowers that pose cut and garden rose growers to a number of different disease challenges.
One of the solutions for these challenges lies within breeding for resistance.
Among the most important diseases are powdery mildew, Agrobacterium, Botrytis and black spot.
With the advancement of tools for genetic analyses in polyploids of the last 15 years it is now possible to generate sufficient genetic markers and perform QTL analyses in several different population settings for tetraploid cultivated material.
We will present the recent advances of QTL studies for disease resistance in collaboration with breeding companies using tetraploid breeding material.
Powdery mildew resistance both in a bi-parental population as well in a GWAS study setting will be the focus.
Using the integrated map of Spiller as well as the available genome sequences an attempt was made to combine results of literature studies and the recent studies in a meta-analyses.
In spite of issues with older marker types and different mapping accuracies, a number of important regions in the rose genome for powdery mildew resistance were identified.
QTL analyses have been performed for Botrytis and black spot.
Results from these studies facilitate in depth studies on the evolution of resistance genes and the search for candidate genes as well as genetic diversity within these genes and gene clusters in a pangenome setting.
An example for a specific QTL region will be discussed to showcase the utility of a pangenome.
One of the solutions for these challenges lies within breeding for resistance.
Among the most important diseases are powdery mildew, Agrobacterium, Botrytis and black spot.
With the advancement of tools for genetic analyses in polyploids of the last 15 years it is now possible to generate sufficient genetic markers and perform QTL analyses in several different population settings for tetraploid cultivated material.
We will present the recent advances of QTL studies for disease resistance in collaboration with breeding companies using tetraploid breeding material.
Powdery mildew resistance both in a bi-parental population as well in a GWAS study setting will be the focus.
Using the integrated map of Spiller as well as the available genome sequences an attempt was made to combine results of literature studies and the recent studies in a meta-analyses.
In spite of issues with older marker types and different mapping accuracies, a number of important regions in the rose genome for powdery mildew resistance were identified.
QTL analyses have been performed for Botrytis and black spot.
Results from these studies facilitate in depth studies on the evolution of resistance genes and the search for candidate genes as well as genetic diversity within these genes and gene clusters in a pangenome setting.
An example for a specific QTL region will be discussed to showcase the utility of a pangenome.
Authors
P. Arens, G. Tumino, P.M. Bourke, R. Voorrips, M. Zerdoner, S. Gabriëls, D.J. Arcega Rustia, M.J.M. Smulders
Keywords
rose, genetic markers, QTL analysis, disease resistance, breeding
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