Molecular and General Genetics MGG

, Volume 248, Issue 3, pp 278–286 | Cite as

QTL analysis of flowering time inArabidopsis thaliana

  • Jonathan H. Clarke
  • Richard Mithen
  • James K. M. Brown
  • Caroline Dean
Original Paper


Quantitative trait loci (QTL) analyses based on restriction fragment length polymorphism maps have been used to resolve the genetic control of flowering time in a cross between twoArabidopsis thaliana ecotypes H51 and Landsbergerecta, differing widely in flowering time. Five quantitative trait loci affecting flowering time were identified in this cross (RLN1-5), four of which are located in regions containing mutations or loci previously identified as conferring a late-flowering phenotype. One of these loci is coincident with theFRI locus identified as the major determinant for late flowering and vernalization responsiveness in theArabidopsis ecotype Stockholm.RLN5, which maps to the lower half of chromosome five (between markers mi69 and m233), only affected flowering time significantly under short day conditions following a vernalization period. The late-flowering phenotype of H51 compared to Landsbergerecta was due to alleles conferring late flowering at only two of the five loci. At the three other loci, H51 possessed alleles conferring early flowering in comparison to those of Landsbergerecta. Combinations of alleles conferring early and late flowering from both parents accounted for the transgressive segregation of flowering time observed within the F2 population. Three QTL,RLN1,RLN2 andRLN3 displayed significant genotype-by-environment interactions for flowering time. A significant interaction between alleles atRLN3 andRLN4 was detected.

Key words

Flowering time Vernalization Quantitative trait loci Arabidopsis RFLP 


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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • Jonathan H. Clarke
    • 1
  • Richard Mithen
    • 2
  • James K. M. Brown
    • 3
  • Caroline Dean
    • 1
  1. 1.Department of Molecular Genetics, BBSRCJohn Innes CentreColney LaneUK
  2. 2.Department of Brassicas and Oilseeds, BBSRCJohn Innes CentreColney LaneUK
  3. 3.Department of Cereal Research, BBSRCJohn Innes CentreColney LaneUK

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