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- W4387395901 abstract "Abstract Deep-water (DW) management in rice fields is a promising technique for efficient control of paddy weeds with reduced herbicide use. Maintaining a water depth of 10–20 cm for several weeks can largely suppress the weed growth, though it also inhibits rice growth because the DW management is usually initiated immediately after transplanting. Improving the DW resistance of rice during the initial growth stage is essential to avoid suppressing growth. In this study, we demonstrate a large genetic variation in the above-ground biomass (AGB) after the end of DW management among 165 temperate japonica varieties developed in Japan. Because the AGB closely correlated with plant length (PL) and tiller number (TN) at the early growth stage, we analyzed genomic regions associated with PL and TN by conducting a genome-wide association study. For PL, a major peak was detected on chromosome 3 ( qPL3 ), which includes a gene encoding gibberellin biosynthesis, OsGA20ox1 . The rice varieties with increased PL had a higher expression level of OsGA20ox1 as reported previously. For TN, a major peak was detected on chromosome 4 ( qTN4 ), which includes NAL1 gene associated with leaf morphological development and panicle number. Although there was less difference in the expression level of NAL1 between genotypes, our findings suggest that an amino acid substitution in the exon region is responsible for the phenotypic changes. We also found that the rice varieties having alternative alleles of qPL3 and qTN4 showed significantly higher AGB than the varieties with the reference alleles. Our results suggest that OsGA20ox1 and NAL1 are promising genes for improving DW resistance in rice." @default.
- W4387395901 created "2023-10-07" @default.
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- W4387395901 date "2023-10-06" @default.
- W4387395901 modified "2023-10-07" @default.
- W4387395901 title "Identification of genomic regions for deep-water resistance in rice for efficient weed control with reduced herbicide use" @default.
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- W4387395901 doi "https://doi.org/10.21203/rs.3.rs-3385459/v1" @default.
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