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Basic Information
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CGSNL Gene Symbol
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FLO5
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Gene Symbol Synonym
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OsSSIIIa, SSIII-2, OsSSIII-2, OsSS3A, SS3A, SS3a, OsSSSIIIa, SSIIIa, Flo5
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CGSNL Gene Name
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FLOURY ENDOSPERM 5
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Gene Name Synonym
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SOLUBLE STARCH SYNTHASE III-2, SOLUBLE STARCH SYNTHASE IIIA, floury endosperm 5
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Protein Name
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SOLUBLE STARCH SYNTHASE IIIA
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Allele
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ss3a, b10, flo5-1, flo5-2, ssIIIa, ssIIIaCR-1, ssIIIaCR-2
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Chromosome No.
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8
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Explanation
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AY100469. an RS (resistant starch) locus. TO:0001069: cooking quality trait.
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Trait Class
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Character as QTL - Yield and productivity
Biochemical character
Seed - Physiological traits - Storage substances
Tolerance and resistance - Stress tolerance
Character as QTL - Grain quality
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Expression
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Sequence/Locus
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cDNA Accession No.
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-
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MSU ID
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LOC_Os08g09230.1
LOC_Os08g09230.2
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RAP ID
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Os08g0191433
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Links
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Oryzabase Chromosome View
(
IRGSP 1.0
/
Build5
)
RAP-DB
(
IRGSP 1.0
/
Build5
)
Related IDs List (
IRGSP 1.0
/
Build5
)
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INSD Accession List
(Test version)
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Link to INSD Accession List
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Map
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Locate(cM)
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Link map
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Classical linkage map
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References
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Huang K., Chen L., Jiao G., Ruan Z., Li X., Tang S., Hu P., Wei X.
Life (Basel) 2025 15(6)
<i>OsMYBR1</i>, a 1R-MYB Family Transcription Factor Regulates Starch Biosynthesis in Rice Endosperm.
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Sun C., Wang Y., Yang X., Tang L., Wan C., Liu J., Chen C., Zhang H., He C., Liu C., Wang Q., Zhang K., Zhang W., Yang B., Li S., Zhu J., Sun Y., Li W., Zhou Y., Wang P., Deng X.
Plant Biotechnol. J. 2023 21(3) 621-634
MATE transporter GFD1 cooperates with sugar transporters, mediates carbohydrate partitioning and controls grain-filling duration, grain size and number in rice.
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Zheng Y., Thi K.M., Lin L., Xie X., Khine E.E., Nyein E.E., Lin M.H.W., New W.W., Aye S.S., Wu W.
Front Plant Sci 2023 14 1250854
Genome-wide association study of cooking-caused grain expansion in rice (<i>Oryza sativa</i> L.).
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Kamara N., Jiao Y., Huang W., Cao L., Zhu L., Zhao C., Huang X., Shivute F.N., Liu X., Wu J., Shahid M.Q.
Front Plant Sci 2023 14 1229870
Comparative cytological and transcriptome analyses of <i>ny2</i> mutant delayed degeneration of tapetal cells and promotes abnormal microspore development in neo-tetraploid rice.
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Jin S.K., Xu L.N., Leng Y.J., Zhang M.Q., Yang Q.Q., Wang S.L., Jia S.W., Song T., Wang R.A., Tao T., Liu Q.Q., Cai X.L., Gao J.P.
Plant Biotechnol. J. 2023
The OsNAC24-OsNAP protein complex activates OsGBSSI and OsSBEI expression to fine-tune starch biosynthesis in rice endosperm.
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Wang A., Jing Y., Cheng Q., Zhou H., Wang L., Gong W., Kou L., Liu G., Meng X., Chen M., Ma H., Shu X., Yu H., Wu D., Li J.
Proc. Natl. Acad. Sci. U.S.A. 2023 120(19) e2220622120
Loss of function of <i>SSIIIa</i> and <i>SSIIIb</i> coordinately confers high RS content in cooked rice.
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Teng Z., Chen Y., Yuan Y., Peng Y., Yi Y., Yu H., Yi Z., Yang J., Peng Y., Duan M., Zhang J., Ye N.
The Crop Journal 2022 10 962-972
Identification of microRNAs regulating grain filling of rice inferior spikelets in response to moderate soil drying post-anthesis
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Irshad F., Li C., Wu H.Y., Yan Y., Xu J.H.
Int J Mol Sci 2022 23(12)
The Function of DNA Demethylase Gene ROS1a Null Mutant on Seed Development in Rice (<i>Oryza Sativa</i>) Using the CRISPR/Cas9 System.
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Niu B., Zhang Z., Zhang J., Zhou Y., Chen C.
Plant J. 2021 106(5) 1233-1246
The rice LEC1-like transcription factor OsNF-YB9 interacts with SPK, an endosperm-specific sucrose synthase protein kinase, and functions in seed development.
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Liu X., Luo J., Li T., Yang H., Wang P., Su L., Zheng Y., Bao C., Zhou C.
Rice (N Y) 2021 14(1) 25
SDG711 Is Involved in Rice Seed Development through Regulation of Starch Metabolism Gene Expression in Coordination with Other Histone Modifications.
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Zhang H., Jang S.G., Lar S.M., Lee A.R., Cao F.Y., Seo J., Kwon S.W.
Plants (Basel) 2021 10(6)
Genome-Wide Identification and Genetic Variations of the starch synthase Gene Family in Rice.
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Baysal C., He W., Drapal M., Villorbina G., Medina V., Capell T., Khush G.S., Zhu C., Fraser P.D., Christou P.
Proc. Natl. Acad. Sci. U.S.A. 2020 117(42) 26503-26512
Inactivation of rice starch branching enzyme IIb triggers broad and unexpected changes in metabolism by transcriptional reprogramming.
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Chen L., Yuan Y., Wu J., Chen Z., Wang L., Shahid M.Q., Liu X.
Rice (N Y) 2019 12(1) 34
Carbohydrate metabolism and fertility related genes high expression levels promote heterosis in autotetraploid rice harboring double neutral genes.
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Chen C., He B., Liu X., Ma X., Liu Y., Yao H.Y., Zhang P., Yin J., Wei X., Koh H.J., Yang C., Xue H.W., Fang Z., Qiao Y.
Plant Biotechnol. J. 2019
Pyrophosphate-fructose 6-phosphate 1-phosphotransferase (PFP1) regulates starch biosynthesis and seed development via heterotetramer formation in rice (Oryza sativa L.).
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Fan C., Wang G., Wang Y., Zhang R., Wang Y., Feng S., Luo K., Peng L.
Int J Mol Sci 2019 20(20)
sucrose synthase Enhances Hull Size and grain weight by Regulating Cell Division and Starch Accumulation in Transgenic Rice.
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Xiong Y., Ren Y., Li W., Wu F., Yang W., Huang X., Yao J.
J. Exp. Bot. 2019 70(15) 3765-3780
NF-YC12 is a key multi-functional regulator of accumulation of seed storage substances in rice.
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Long W., Wang Y., Zhu S., Jing W., Wang Y., Ren Y., Tian Y., Liu S., Liu X., Chen L., Wang D., Zhong M., Zhang Y., Hu T., Zhu J., Hao Y., Zhu X., Zhang W., Wang C., Zhang W., Wan J.
Plant Physiol. 2018 177(2) 698-712
FLOURY shrunken endosperm1 Connects Phospholipid Metabolism and Amyloplast Development in Rice.
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Crofts N., Sugimoto K., Oitome N.F., Nakamura Y., Fujita N.
Plant Mol. Biol. 2017 94(4-5) 399-417
Differences in specificity and compensatory functions among three major starch synthases determine the structure of amylopectin in rice endosperm.
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Zhou H., Wang L., Liu G., Meng X., Jing Y., Shu X., Kong X., Sun J., Yu H., Smith S.M., Wu D., Li J.
Proc. Natl. Acad. Sci. U.S.A. 2016
Critical roles of soluble starch synthase SSIIIa and granule-bound starch synthase Waxy in synthesizing resistant starch in rice.
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Ordonio R.L., Matsuoka M.
Proc. Natl. Acad. Sci. U.S.A. 2016
Increasing resistant starch content in rice for better consumer health.
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Asai H., Abe N., Matsushima R., Crofts N., Oitome N.F., Nakamura Y., Fujita N.
J. Exp. Bot. 2014 65(18) 5497-507
Deficiencies in both Starch synthase IIIa and branching enzyme IIb lead to a significant increase in amylose in SSIIa-inactive japonica rice seeds.
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Lu F.H., Park Y.J.
J. Cereal Sci. 2012 56 706-712
An SNP downstream of the OsBEIIb gene is significantly associated with amylose content and viscosity properties in rice (Oryza sativa L.)
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Fujita N., Satoh R., Hayashi A., Kodama M., Itoh R., Aihara S., Nakamura Y.
J. Exp. Bot. 2011 62(14) 4819-31
Starch biosynthesis in rice endosperm requires the presence of either Starch synthase I or IIIa.
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Yan CJ,Tian ZX,Fang YW,Yang YC,Li J,Zeng SY,Gu SL,Xu CW,Tang SZ,Gu MH
Theor. Appl. Genet. 2011 122(1) 63-76
Genetic analysis of starch paste viscosity parameters in glutinous rice (Oryza sativa L.).
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Tian,Z., Qian,Q., Liu,Q., Yan,M., Liu,X., Yan,C., Liu,G., Gao,Z., Tang,S., Zeng,D., Wang,Y., Yu,J., Gu,M. and Li,J.
Proc. Natl. Acad. Sci. U.S.A. 2009 106(51) 21760-5
Allelic diversities in rice starch biosynthesis lead to a diverse array of rice eating and cooking qualities
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Satoh,H., Shibahara,K., Tokunaga,T., Nishi,A., Tasaki,M., Hwang,S.K., Okita,T.W., Kaneko,N., Fujita,N., Yoshida,M., Hosaka,Y., Sato,A., Utsumi,Y., Ohdan,T. and Nakamura,Y.
Plant Cell 2008 20(7) 1833-1849
Mutation of the Plastidial {alpha}-Glucan Phosphorylase Gene in Rice Affects the Synthesis and Structure of Starch in the Endosperm
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Fujita N,Yoshida M,Kondo T,Saito K,Utsumi Y,Tokunaga T,Nishi A,Satoh H,Park JH,Jane JL,Miyao A,Hirochika H,Nakamura Y
Plant Physiol. 2007 144 2009-23
Characterization of SSIIIa-deficient mutants of rice: the function of SSIIIa and pleiotropic effects by SSIIIa deficiency in the rice endosperm.
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Ryoo N, Yu C, Park CS, Baik MY, Park IM, Cho MH, Bhoo SH, An G, Hahn TR, Jeon JS.
Plant Cell Rep. 2007 26(7) 1083-95
Knockout of a starch synthase gene OsSSIIIa/Flo5 causes white-core floury endosperm in rice (Oryza sativa L.).
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Fujita N, Yoshida M, Asakura N, Ohdan T, Miyao A, Hirochika H, Nakamura Y.
Plant Physiol. 2006 140(3) 1070-84
Function and characterization of starch synthase I using mutants in rice.
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Dian,W., Jiang,H. and Wu,P.
J. Exp. Bot. 2005 56(412) 623-632
Evolution and expression analysis of starch synthase III and IV in rice.
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Hirose T, Terao T.
Planta. 2004 220(1) 9-16
A comprehensive expression analysis of the starch synthase gene family in rice (Oryza sativa L.).
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DB Reference
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Gramene ID
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GR:0061114
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Ontologies
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Gene Ontology
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response to desiccation( GO:0009269 )
starch biosynthetic process( GO:0019252 )
starch synthase activity( GO:0009011 )
chloroplast( GO:0009507 )
amyloplast( GO:0009501 )
polysaccharide metabolic process( GO:0005976 )
amyloplast starch grain( GO:0009568 )
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Trait Ontology
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seed composition based quality trait( TO:0000488 )
gelatinization temperature( TO:0000462 )
cooking or brewing quality( TO:0000667 )
drought related trait( TO:0000394 )
starch content( TO:0000696 )
amylose content( TO:0000196 )
fat and essential oil content( TO:0000604 )
1000-seed weight( TO:0000382 )
grain yield( TO:0000396 )
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Plant Ontology
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seed( PO:0009010 )
endosperm( PO:0009089 )
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Related Strains
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Phenotype images
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Last updated
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Oct 9, 2025
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Update info.