An-1

2015-01-20 | Categories genes  | Tags grains per panicle  grain yield  grain number  awn  panicle  yield  grain  grain size  cell division 

• Information
  • Symbol: An-1
  • MSU: LOC_Os04g28280
  • RAPdb: Os04g0350700
• Publication
  • An-1 encodes a basic helix-loop-helix protein that regulates awn development, grain size, and grain number in rice, 2013, Plant Cell.
  • Natural alleles of GLA for grain length and awn development were differently domesticated in rice subspecies japonica and indica., 2019, Plant Biotechnol J.
• Genbank accession number
  • CR855121
  • FO681395
  • FO681399
  • FO681475
  • CR855121
  • FO681395
  • FO681399
  • FO681475
  • CR855121
  • FO681395
  • FO681399
  • FO681475
  • CR855121
  • FO681395
  • FO681399
  • FO681475
• Key message
  • The nearly-isogenic line (NIL-An-1) carrying a wild allele An-1 in the genetic background of the awnless indica Guangluai4 produces long awns and longer grains, but significantly fewer grains per panicle compared with Guangluai4
  • Thus, we propose that awn loss was favored and strongly selected by humans, as genetic variations at the An-1 locus that cause awn loss would increase grain numbers and subsequently improve grain yield in cultivated rice
  • Transgenic studies confirmed that An-1 positively regulates awn elongation, but negatively regulates grain number per panicle
  • An-1 encodes a basic helix-loop-helix protein that regulates awn development, grain size, and grain number in rice
  • We report here the molecular cloning of a major quantitative trait locus, An-1, which regulates long awn formation in O
  • Genetic variations in the An-1 locus were found to be associated with awn loss in cultivated rice
  • An-1 encodes a basic helix-loop-helix protein, which regulates cell division
  • Analyses of minimum spanning trees and introgression regions demonstrated that An-1, an important gene for awn formation, was preferentially domesticated, and its mutation to an-1 was followed by GLA and An-2
• Connection
  • An-1, LABA1~OsLOGL6~An-2, An-2 Encodes a Cytokinin Synthesis Enzyme That Regulates Awn Length and Grain Production in Rice., Expressional analysis demonstrates that An-1 regulates the formation of awn primordial, and An-2 promotes awn elongation
  • An-1, LABA1~OsLOGL6~An-2, Natural alleles of GLA for grain length and awn development were differently domesticated in rice subspecies japonica and indica., Analyses of minimum spanning trees and introgression regions demonstrated that An-1, an important gene for awn formation, was preferentially domesticated, and its mutation to an-1 was followed by GLA and An-2
  • An-1, OsSPL14~IPA1~WFP, Targeting a gene regulatory element enhances rice grain yield by decoupling panicle number and size., Mechanistic studies revealed that the deleted fragment is a target site for the transcription factor An-1 to repress IPA1 expression in panicles and roots

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