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- Title
Genome-Wide Association Analysis Identifies Resistance Loci for Bacterial Leaf Streak Resistance in Rice (Oryza sativa L.).
- Authors
Sattayachiti, Wannapa; Wanchana, Samart; Arikit, Siwaret; Nubankoh, Phakchana; Patarapuwadol, Sujin; Vanavichit, Apichart; Darwell, Clive T.; Toojinda, Theerayut
- Abstract
Bacterial leaf streak (BLS) caused by Xanthomonas oryzae pv. oryzicola (Xoc) is one of the most devastating diseases in rice production areas, especially in humid tropical and subtropical zones throughout Asia and worldwide. A genome-wide association study (GWAS) analysis conducted on a collection of 236 diverse rice accessions, mainly indica varieties, identified 12 quantitative trait loci (QTLs) on chromosomes 1, 2, 3, 4, 5, 8, 9 and 11, conferring resistance to five representative isolates of Thai Xoc. Of these, five QTLs conferred resistance to more than one Xoc isolates. Two QTLs, qBLS5.1 and qBLS2.3, were considered promising QTLs for broad-spectrum resistance to BLS. The xa5 gene was proposed as a potential candidate gene for qBLS5.1 and three genes, encoding pectinesterase inhibitor (OsPEI), eukaryotic zinc-binding protein (OsRAR1), and NDP epimerase function, were proposed as candidate genes for qBLS2.3. Results from this study provide an insight into the potential QTLs and candidate genes for BLS resistance in rice. The recessive xa5 gene is suggested as a potential candidate for strong influence on broad-spectrum resistance and as a focal target in rice breeding programs for BLS resistance.
- Subjects
ASIA; BACTERIAL loci; DRUG resistance in bacteria; RECESSIVE genes; RICE diseases &; pests; ZINC transporters; PYRICULARIA oryzae; XANTHOMONAS oryzae
- Publication
Plants (2223-7747), 2020, Vol 9, Issue 12, p1673
- ISSN
2223-7747
- Publication type
Article
- DOI
10.3390/plants9121673