Identification and genetic mapping of Brassica napus for resistance to pathotype 5X of Plasmodiophora brassicae

The Challenge

Particular concern about the erosion of clubroot resistance in the Canadian resistant hybrids in 2014 due to the emergence of a new pathotype 5X.

The Project

Identify new sources for resistance to pathotype 5X in Brassica napus and study the inheritance of clubroot resistance (CR) to manage the disease with developing canola cultivars.

The Results

52 lines from B.napus, B.oleracea, and B.nigra were found resistant to 5X, as well as 5 B.napus lines that are resistant to novel pathotypes 3A, 2B and 3D.

Grower Benefits

By finding new lines resistant to novel pathotypes, seed companies can take this information and apply it to their canola varieties for them to be commercially available to growers.