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Linkage disequilibrium mapping: A journey from traditional breeding to molecular breeding in crop plants

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Title Linkage disequilibrium mapping: A journey from traditional breeding to molecular breeding in crop plants
 
Creator Sahoo, Jyoti Prakash
Mohapatra, Upasana
Saha, Debanjana
Mohanty, Iswar Chandra
Samal, Kailash Chandra
 
Subject Association mapping
GWAS
Linkage disequilibrium
Molecular markers
QTLs
 
Description 434-442
Germplasms are the reservoir of agronomically important traits traditionally maintained by various tribal communities
over the year. Maintaining these germplasms generations after generations has little value unless exploited for the desired
agronomic traits like biotic and abiotic stress, yield attributes and nutritional enrichment. Association mapping, otherwise
called linkage disequilibrium mapping, is a molecular breeding approach for characterizing complex traits with agronomic
importance in crop plants. It is a systematic method for identifying novel traits and is treated as an alternative tool to
traditional QTL mapping approaches, which involves correlating molecular markers with the phenotypic trait in a diversified
population. The map's resolution in association mapping is based on the candidate-gene approach or genome-wide
association approach. Therefore, association mapping studies offer a great perspective on crop genetic improvement. Still,
considerably large-scale research is required to determine the sensible implementation of association mapping analysis in
most crop plants. Currently, there is considerable interest in using association mapping approaches in crop breeding
programs, which can be achieved by advanced genomic technology and the development of statistical computer software
packages. Here, the linkage disequilibrium approach and its usefulness in association mapping studies, including the steps
associated with it are discussed. The current status and future challenges in complex trait dissection by utilizing the linkage
disequilibrium mapping in crop plants are also discussed.
 
Date 2022-05-04T09:42:16Z
2022-05-04T09:42:16Z
2022-04
 
Type Article
 
Identifier 0975-1068 (Online); 0972-5938 (Print)
http://nopr.niscair.res.in/handle/123456789/59646
 
Language en
 
Relation Int Cl22: A01H 1/00, A01H 1/04
 
Publisher NIScPR-CSIR, India
 
Source IJTK Vol.21(2) [April 2022]