Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. Oleracea spp. Capitata). IV. A resistant 18-chromosome B1 plant and its B2 progenies

Chiang, B. Y.; Chiang, M. S.; Grant, W. F.; Crête, R.

doi:10.1007/bf00037248

Cited by 21 publications

(5 citation statements)

References 8 publications

(6 reference statements)

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“…Thus, the monogenic dominant inheritance found in this study indicates that this single gene is located on a chromosome in the 'al' genome. This result also supports our earlier deduction that the dominant gene governing resistance to race 2 in plant Bl-A-I, the 18-chromosome B1 plant derived from an interspecific triploid F1 hybrid (2n = 28, genomes alclc) and 2x-cabbage, is located on one of the two 'al' chromosomes transferred from B. naps (CHIANG et al, 1980). Furthermore, resistance in BI-A-1 and its B2 progenies was not the result of recombination but was the result of limited transmission of a B. nupus chromosome which was either successfully transmitted or not transmitted at all (CHIANG et al, 1980).…”

Section: And Discussionsupporting

confidence: 79%

“…This result also supports our earlier deduction that the dominant gene governing resistance to race 2 in plant Bl-A-I, the 18-chromosome B1 plant derived from an interspecific triploid F1 hybrid (2n = 28, genomes alclc) and 2x-cabbage, is located on one of the two 'al' chromosomes transferred from B. naps (CHIANG et al, 1980). Furthermore, resistance in BI-A-1 and its B2 progenies was not the result of recombination but was the result of limited transmission of a B. nupus chromosome which was either successfully transmitted or not transmitted at all (CHIANG et al, 1980). On the other hand, in plants derived from Bl-20 in this study, resistance apparently has resulted from recombination because meioses in the plants examined were all regular, and the expected classic Mendelian segregation was manifested.…”

Section: And Discussionsupporting

confidence: 79%

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Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. Oleracea ssp. capitata). V. The inheritance of resistance

Chiang

Crête

1983

Euphytica

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Section: And Discussionsupporting

confidence: 79%

Section: And Discussionsupporting

confidence: 79%

Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. Oleracea ssp. capitata). V. The inheritance of resistance

Chiang

Crête

1983

Euphytica

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“…Chiang et al (1980) introduced resistance into Brassica oleracea from Brassica napus. Yoshikawa et al (1981) found clubroot-resistant (CR) lines in European fodder turnips and used them as sources for breeding CR Chinese cabbages.…”

Section: Introductionmentioning

confidence: 99%

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

Suwabe

Tsukazaki

Iketani³

et al. 2003

Theor Appl Genet

199

168

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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.

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“…For Clubroot, a single dominant gene from resistant B. rapa turnip morphotypes was successfully introduced into Chinese cabbage (Yoshikawa, 1980 ). Transfer of a Clubroot resistance gene was also performed from B. napus into B. oleracea , with the resistance gene believed to also be carried in the A genome of B. rapa (Chiang et al, 1980 ). In Canada, efforts to transfer a Clubroot resistance gene from the B. napus hybrid “Mendel” into a local susceptible spring B. napus cultivar was promising (Rahman et al, 2011 ).…”

Section: Strategiesmentioning

confidence: 99%

Current Status and Challenges in Identifying Disease Resistance Genes in Brassica napus

2017

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Brassica napus is an economically important crop across different continents including temperate and subtropical regions in Europe, Canada, South Asia, China and Australia. Its widespread cultivation also brings setbacks as it plays host to fungal, oomycete and chytrid pathogens that can lead to serious yield loss. For sustainable crop production, identification of resistance (R) genes in B. napus has become of critical importance. In this review, we discuss four key pathogens affecting Brassica crops: Clubroot (Plasmodiophora brassicae), Blackleg (Leptosphaeria maculans and L. biglobosa), Sclerotinia Stem Rot (Sclerotinia sclerotiorum), and Downy Mildew (Hyaloperonospora parasitica). We first review current studies covering prevalence of these pathogens on Brassica crops and highlight the R genes and QTL that have been identified from Brassica species against these pathogens. Insights into the relationships between the pathogen and its Brassica host, the unique host resistance mechanisms and how these affect resistance outcomes is also presented. We discuss challenges in identification and deployment of R genes in B. napus in relation to highly specific genetic interactions between host subpopulations and pathogen pathotypes and emphasize the need for common or shared techniques and research materials or tighter collaboration between researchers to reconcile the inconsistencies in the research outcomes. Using current genomics tools, we provide examples of how characterization and cloning of R genes in B. napus can be carried out more effectively. Lastly, we put forward strategies to breed resistant cultivars through introgressions supported by genomic approaches and suggest prospects that can be implemented in the future for a better, pathogen-resistant B. napus.

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Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. Oleracea spp. Capitata). IV. A resistant 18-chromosome B1 plant and its B2 progenies

Cited by 21 publications

References 8 publications

Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. Oleracea ssp. capitata). V. The inheritance of resistance

Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. Oleracea ssp. capitata). V. The inheritance of resistance

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

Current Status and Challenges in Identifying Disease Resistance Genes in Brassica napus

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