Format

Send to

Choose Destination
Theor Appl Genet. 2003 Oct;107(6):997-1002. Epub 2003 Sep 3.

Identification of two loci for resistance to clubroot (Plasmodiophora brassicae Woronin) in Brassica rapa L.

Author information

1
National Institute of Vegetable and Tea Science (NIVTS), 360 Kusawa, Ano, Age, Mie 514-2392, Japan.

Abstract

In an analysis of 114 F(2) individuals from a cross between clubroot-resistant and susceptible lines of Brassica rapa L., 'G004' and 'Hakusai Chukanbohon Nou 7' (A9709), respectively, we identified two loci, Crr1 and Crr2, for clubroot (caused by Plasmodiophora brassicae Woronin) resistance. Each locus segregated independently among the F(2) population, indicating that the loci reside on a different region of chromosomes or on different chromosomes. Genetic analysis showed that each locus had little effect on clubroot resistance by itself, indicating that these two loci are complementary for clubroot resistance. The resistance to clubroot was much stronger when both loci were homozygous for resistant alleles than when they were heterozygous. These results indicate that clubroot resistance in B. rapa is under oligogenic control and at least two loci are necessary for resistance.

PMID:
12955203
DOI:
10.1007/s00122-003-1309-x
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Springer
Loading ...
Support Center