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White rust: Plant-microbe interaction and plant breedingperspective on Indian mustard

Indian Agricultural Research Journals

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Title White rust: Plant-microbe interaction and plant breedingperspective on Indian mustard
 
Creator D PRAKASH
K SRIVASTAVA
B SINHA
 
Subject Avirulence gene, Brassica, Molecular markers, Resistance gene, White rust
 
Description White rust is an important disease of Indian mustard which results in appreciable yield losses. A monogenic dominant gene has been responsible for resistance against this pathogen in B. juncea. In the pathogen, avirulence has been observed to be dominant, governed by a single gene. R gene (resistance gene) present in resistant lines of B. juncea, encodes CC-NB-LRR (coiled coil nucleotide binding leucine rich repeat) protein whereas, susceptible lines have truncated LRR domain of the same protein. Resistant and moderately resistant lines have higher amount of chlorophyll, sugars and total phenols than susceptible cultivars, throughout crop growth. Increased accumulation of phytoalexins such as spirobrassinin, cyclobrassinin and rutalexin have been observed in resistant lines compared to, susceptible ones upon infection by fungi. Molecular markers tagged to R gene are being used in resistance breeding programmes. Scientists have developed intron polymorphism (IP) markers namely;At5g41560, At5g41940 and At2g36360 for positive selection of white rust resistance and, simple sequence repeat (SSR) marker, At2g34700, for negative selection of resistance in different rust resistant sources. The major issue in use of these markers is their transferability as they do not show association with R gene in different set of crosses.
 
Publisher Indian Society of Oilseeds Research
 
Date 2023-12-14
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/JOR/article/view/146144
10.56739/04jdkp09
 
Source Journal of Oilseeds Research; Vol. 40 No. Specialissue (2023): Journal of Oilseeds Research
0970-2776
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/JOR/article/view/146144/53285
 
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