Multiscale Phenotyping and Decision Strategies in Breeding for Resistance

Abstract

Advances in biotechnology have rendered tracking of quantitative trait loci (QTLs) a much easier task, making phenotyping, and not genotyping, the main bottleneck to integrating quantitative host plant resistance into breeding programs. The relevance of phenotyping methods is conditioned by their ability to predict the performance of a genotype at the field scale. Components of resistance represent the keystone hierarchy level between resistance expression in the field (the breeder's scale) and QTLs (the geneticist's scale). We describe approaches for upscaling processes to identify components of resistance that best predict field resistance, and for decision making for selection in breeding programs. We further highlight avenues for future research considering specific processes: disease transmission, defoliation, disease escape, polyetic processes, and interactions between components of resistance.

Published in

Trends in Plant Science
2017, volume: 22, number: 5, pages: 420-432
Publisher: ELSEVIER SCIENCE LONDON

SLU Authors

• Yuen, Jonathan

  • Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences
    

Associated SLU-program

SLU Plant Protection Network

UKÄ Subject classification

Plant Biotechnology

Publication identifier

• DOI: https://doi.org/10.1016/j.tplants.2017.01.009

Permanent link to this page (URI)

https://res.slu.se/id/publ/82537