Publications by authors named "N S Kottearachchi"

A method for separating M. oryzae from rice samples infected with multiple pathogens using basic laboratory equipment is described. We conducted a series of experiments to obtain a single spore of M.

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Fungal diseases blast and brown spot in rice cause severe yield losses worldwide. Blast is caused by , and is reported as the main causal organism of brown spot. Both diseases cause leaf lesions that are difficult differentiate until the later stages.

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Background: Pi-ta is a major blast resistant gene, introgressed from indica rice varieties. In this study, diversity of the Pi-ta gene of 47 Sri Lankan rice accessions was studied by bioinformatics, and the results were validated with molecular and disease reaction assays. Sequences of rice accessions at the locus Os12g0281300 were retrieved from Rice SNP-Seek Database, and the coding sequence of reference Pi-ta gene of cultivar Tetep (accession no.

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Recent advances in next generation sequencing have created opportunities to directly identify genetic loci and candidate genes for abiotic stress responses in plants. With the objective of identifying candidate genes within the previously identified QTL-hotspots, the whole genomes of two divergent cultivars for salt responses, namely At 354 and Bg 352, were re-sequenced using Illumina Hiseq 2500 100PE platform and mapped to Nipponbare and R498 genomes. The sequencing results revealed approximately 2.

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Article Synopsis
  • Breeding for salt tolerance in rice is crucial for improving yields in saline areas, but traditional methods face challenges due to the trait's complex genetic background.
  • The study developed a detailed molecular map using SNP markers by assessing salinity responses in 281 genetically diverse rice lines derived from a salt-tolerant and a salt-susceptible variety.
  • The research identified 83 significant QTLs linked to salt response traits, with potential for pinpointing candidate genes, as many were clustered in 14 QTL hotspots across the rice genome.
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