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Genome-Wide Association Mapping in Rice MAGIC indica panel detects QTLs and Genes for Broad-spectrum resistance breeding against African Bacterial Blight

Indian Agricultural Research Journals

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Title Genome-Wide Association Mapping in Rice MAGIC indica panel detects QTLs and Genes for Broad-spectrum resistance breeding against African Bacterial Blight
 
Creator Okello, Moses
Ssemakula, Mildred Ochwo
Lamo, Jimmy
Onaga, Geoffrey
Odong, Thomas L
Geoffrey, Tusiime
Tukamuhabwa, Phinehas
Mukasa, Settumba B
Peter, Wasswa
Ogwal, Jonathan
Oliva, Ricardo
 
Subject Africa
Bacterial blight (BB)
broad-spectrum resistance (BSR)
multiparent advanced generation intercross (MAGIC)
Quantitative trait loci (QTL)
Xanthomonas oryzae pv. oryzae
 
Description Rice (Oryza sativa) bacterial blight (BB) is a direct threat to production in Africa. The extent of damage on the continent is not known. We conducted a genome-wide association study (GWAS) to seek out Quantitative trait loci (QTL) that confer the broad-spectrum resistance (BSR) to rice Xanthomonas oryzae pv. oryzae in the rice Multiparent advanced generation intercross (MAGIC) population. The diverse genetic composition and high levels of recombination, are potential resources for the identification of QTL for BSR. Dealing with the ever-evolving Xoo requires identification of novel R gene and resistance quantitative trait loci (QTL). We conducted a genome-wide association study (GWAS) using 250 rice MAGIC indica panel to evaluate for resistance to three Xoo strains from Cote D'Ivoire, namely XooCIkor, XooCIgag and XooCIcii2 which are prevalent highly virulent pathotypes.Using the 3 K RG 4.8mio filtered SNP Dataset, a total of 3 QTL associated with BB resistance on chromosome 9, 6 and 5 were identified.The results of the GWAS identified novel loci that gives useful insight for more investigation and also validated known genes underlying resistance to virulent African strains of BB. Genetic donors identified in this will help plant breeders in improving and broadening resistance to BB.
Key words: Africa, Bacterial blight (BB), broad-spectrum resistance (BSR), multiparent advanced generation intercross (MAGIC), Quantitative trait loci (QTL), Xanthomonas oryzae pv. oryzae
 
Publisher Association of Rice Research Workers
 
Date 2024-03-30
 
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/OIJR/article/view/147839
 
Source ORYZA-An International Journal of Rice; Vol. 61 No. 1 (2024): March-2024
2249-5266
0474-7615
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/OIJR/article/view/147839/54225
 
Rights Copyright (c) 2024 Association of Rice Research Workers
http://creativecommons.org/licenses/by/4.0