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- W3146094408 abstract "Leaf is the main photosynthetic organ of rice. Moderate rolling leaf could keep plants upright, increasing transmittance in the lower leaf, then improving the light condition of population, which is important for high-yield breeding. Here, we obtained a late-stage moderate-rolled leaf mutant lrl1 in rice deriving from the restorer line Jinhui10(Oryza sativa L. ssp. indica) treated by ethylmethane sulfonate(EMS). The leaves of lrl1 were normal in early development stages. Then, the upper 3 leaves began rolling inward along the vein after thirteen leaf age, and the rolling index increased with the plant development until the heading stage. The rolling index of flag leaf, 2nd and 3rd leaf from the top in lrl1 was 73.66%, 66.91% and 45.81% at maturity stage, respectively. Compared with the wild-type,most of the important agronomic traits in lrl1 existed no significant difference, only 1000-grains weight(21.43 g) were significantly less than that of the wild type. In mutant lrl1, the decreased number, strange shape, and irregular arrangement of bulliform cells made the angles among small vascular bundles become smaller, which might cause the leaf rolling. Chlorophyll a and b, total chlorophyll and carotenoid content were all significantly higher than that of wild type. However, the net photosynthetic rate, stomatal conductance,transpiration rate in the lrl1 existed no difference with those in wild type. By genetic analysis and gene mapping, the rolled leaf mutant was found to be controlled by a single recessive nuclear gene. And the LRL1 was mapped between SWU-1 and Ind6 on the chromosome 9, physical distance is 812 kb. By candidate gene prediction in the area, there are 129 genes altogether. Through sequencing, three genes possibly related to rolled leaf were found existing no difference between lrl1 and J10. Real-time PCR analysis of 6 cloned rolled leaf gene related to bulliform cells changes showed that the expression quantity of ACL1, SRL1 and NAL7 were down-regulated significantly, that of ROC5 and RL14 were up-regulated significantly, indicating that the LRL1 might be the same passage for regulating leaf development with these genes. The LRL1 is a new found gene. So these results will be important for further cloning and functional analysis of the gene, especially have important utilization value in rice high-yield breeding because of most advantageous traits to breeding in lrl1 and its simple genetic behavior." @default.
- W3146094408 created "2021-04-13" @default.
- W3146094408 creator A5076178897 @default.
- W3146094408 date "2015-01-01" @default.
- W3146094408 modified "2023-09-24" @default.
- W3146094408 title "Identification, gene mapping and candidate gene prediction of a late-stage rolled leaf mutant lrl1 in rice(Oryza sativa L.)" @default.
- W3146094408 hasPublicationYear "2015" @default.
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