Molecular markers linked to white rust resistance in mustard Brassica juncea

White rust, caused by Albugo candida (Pers.) Kuntze, is an economically important disease of Brassica juncea (L.) Czern and Coss mustard, particularly in India. The most efficient and cost-effective way of protecting mustard plants from white rust disease is through genetic resistance. The objective...

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Bibliographic Details
Published in:Theoretical and applied genetics 1998-10, Vol.97 (5/6), p.865-870
Main Authors: Prabhu, K.V, Somers, D.J, Rakow, G, Gugel, R.K
Format: Article
Language:English
Subjects:
ac21 locus
Albugo candida
Biological and medical sciences
Brassica juncea
bulked segregant analysis
chromosome mapping
Classical genetics, quantitative genetics, hybrids
Cruciferae
cultivars
disease resistance
Fundamental and applied biological sciences. Psychology
Genetic aspects
Genetic markers
genetic techniques and protocols
Genetics
Genetics of eukaryotes. Biological and molecular evolution
Genomics
germplasm
Identification and classification
linkage (genetics)
linkage groups
loci
Plant breeding
Plant genetics
Plant immunology
Pteridophyta, spermatophyta
random amplified polymorphic DNA technique
rust diseases
segregation
Vegetals
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Summary:White rust, caused by Albugo candida (Pers.) Kuntze, is an economically important disease of Brassica juncea (L.) Czern and Coss mustard, particularly in India. The most efficient and cost-effective way of protecting mustard plants from white rust disease is through genetic resistance. The objective of this study was to identify RAPD markers for white rust resistance in an F1-derived doubled-haploid (DH) population originating from a cross between white rust-susceptible and white rust-resistant breeding lines of B. juncea from the canola-quality B. juncea breeding project of the Agriculture and Agri-Food Canada-Saskatoon Research Centre. The DH population was used to screen for RAPD markers associated with white rust resistance/susceptibility using bulked segregant analysis. Two markers, WR2 and WR3, linked to white rust resistance, flanked the resistance locus Ac2(1) and were highly effective in identifying the presence or absence of the resistance gene in the DH population. These two markers were shown to be specific to the Russian source of white rust resistance utilized in this project. It is concluded that the availability of these RAPD markers will enhance the breeding for white rust resistance in B. juncea.
ISSN:0040-5752
1432-2242
DOI:10.1007/s001220050966