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Seasonal control of flowering time in temperate cereals

Seasonal control of flowering time in temperate cereals. RESET. VRN2 represses FT1. Increasing daylength induces FT1 = Floral development + decreased frost tolerance. Cold induces VRN1. Ben Trevaskis. CSIRO, Division of Plant Industry. Vrn-H2. vrn-H1. vrn-H2. vrn-H1. Vrn-H2. Vrn-H1.

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Seasonal control of flowering time in temperate cereals

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  1. Seasonal control of flowering time in temperate cereals RESET VRN2 represses FT1 Increasing daylength induces FT1 = Floral development + decreased frost tolerance Cold induces VRN1 Ben Trevaskis.CSIRO, Division of Plant Industry

  2. Vrn-H2 vrn-H1 vrn-H2 vrn-H1 Vrn-H2 Vrn-H1 vrn-H2 Vrn-H1 VRN-H2 Repression of VRN-H1 ZCCT-H (VRN-H2) HvBM5A (VRN-H1) V2 mRNA V2 - VRN Intron1 Winter V2 mRNA Flower + VRN Intron1 mRNA Flower -/+ VRN Facultative Intron1 V2 mRNA Flower Spring -/+ VRN or Intron1(Δ)

  3. 1kb Recessive/Strider (17) Dominant/Albacete (7) Dominant/Morex (53) Dominant/Maskin (3) Dominant/Triumph (10) Dominant/OWB-D (12) 2.8 kb barley-wheat conserved region Exon 1 Exon 2 436 bp vernalization critical region Schematic representation of VRN-H1 intron 1 types found in the CAP Core

  4. Oregon Wolfe Barley Linkage Map (2383 loci, Haldane cM)

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