Identification of CRa and CRb Genes Resistant to Clubroot Disease among Twenty -Four Chinese Cabbage Varieties with Molecular Markers
Sun Zhaohui
Ma Anfeng
Cao Dandan
Cheng Fei
Gao Jianwei
Abstract：Clubroot disease is one of the most serious diseases of Chinese cabbage (Brassica rapa) caused by the soil -borne plant pathogen Plasmodiophora brassicae.CRa and CRb are the two important genes against to clubroot disease in Chinese cabbage breeding.In this research,we selected a pair of effective SCAR makers SC2930 -T and SC2930 -Q to detect CRa gene from four published candidates.Depending on this pair of markers and another effective codominant marker TCR05 closely linked to CRb gene,12 varieties both with CRa and CRb genes,5 varieties only with CRa gene,3 varieties only with CRb gene and 4 varieties with neither CRa nor CRb genes were screened out from 24 important Chinese cabbage varieties.This research re-sults showed that both CRa and CRb were independent dominant genes resistant to clubroot disease in Chinese cabbage.This research had great reference values for molecular marker assisted breeding of Chinese cabbage resistant to clubroot disease.
Keywords：Chinese cabbageGermplasm resourcesClubroot diseaseCRa and CRbMolecular markers
Publication Date：2016-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 16-19,53 )