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Author Li Z., Liu J., Wang X., Wang J., Ye J., Xu S., Zhang Y., Hu D., Zhang M., Xu Q., Wang S., Yang Y., Wei X., Feng Y., Wang S.
Title <i>LG5</i>, a Novel Allele of <i>EUI1</i>, Regulates grain size and flag leaf Angle in Rice.
Abstract:
grain size and flag leaf angle are two important traits that determining grain yield in rice. However, the mechanisms regulating these two traits remain largely unknown. In this study, a rice <i>long grain 5</i> (<i>lg5</i>) mutant with a large flag leaf angle was identified, and map-based cloning revealed that a single base substitution followed by a 2 bp insertion in the <i>LOC_Os05g40384</i> gene resulted in larger grains, a larger flag leaf angle, and higher plant height than the wild type. Sequence analysis revealed that <i>lg5</i> is a novel allele of <i>elongated uppermost internode-1</i> (<i>EUI1</i>), which encodes a cytochrome P450 protein. Functional complementation and overexpression tests showed that <i>LG5</i> can rescue the bigger grain size and larger flag leaf angle in the Xiushui11 (XS) background. Knockdown of the <i>LG5</i> transcription level by RNA interference resulted in elevated grain size and flag leaf angle in the Nipponbare (NIP) background. Morphological and cellular analyses suggested that <i>LG5</i> regulated grain size and flag leaf angle by promoting cell expansion and cell proliferation. Our results provided new insight into the functions of <i>EUI1</i> in rice, especially in regulating grain size and flag leaf angle, indicating a potential target for the improvement of rice breeding.
Journal Plants (Basel)
Country China
Volume 12(3)
Pages
Year 2023
PubMed ID 36771759
PubMed Central ID 9921835
DOI 10.3390/plants12030675
URL -
Relation
Gene CDC2-2 CDKB2;1 CYCA3;2 CYCB1;1 CYCB2;2 EUI1 GS2 GS5
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
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Stages in Each Organ
- Muant Lines (Gene)
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Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
/rice/oryzabase