6533b82bfe1ef96bd128dd01

RESEARCH PRODUCT

Composantes de l’architecture racinaire de la plante associées aux QTL de résistance à Aphanomyces euteiches dans des lignées quasi-isogéniques de pois (Pisum sativum L.)

subject

description

Pea (Pisum sativum L.) is the most cultivated seed legume in the world after common bean. But it issubject to a disease against which there is no effective treatment, root rot caused by Aphanomyceseuteiches. The only sustainable solution to control A. euteiches is genetic control. Previous studies haveidentified a positive correlation between the root area or biomass of lines and their level of resistance toroot rot caused by A. euteiches. The aim of the internship, which was part of the research project"Diversification and Combination of Aphanomyces Resistance QTLs in Protein Pea (DORA)", was toidentify whether changes in the components of the root system architecture of pea are induced by the A.euteiches resistance QTLs alone or in combination. The study was based on image analyses of the rootsystems of 12 pea lines, including 9 NILs (Near-Isogenic Lines) with 0 to 5 resistance QTLs, usingSmartRoot software. The use of this software allowed us to obtain data for 16 root variables but was verytime consuming. By analysing the results obtained, we selected a subset of 8 variables, representative ofthe root system and less time-consuming to obtain, and allowing us to highlight differences between thelines at the early stages of development. Further analysis will allow us to study differences between lines atlater stages