QTL mapping of naturally-occurring variation in flowering time of Arabidopsis thaliana.

Academic Article


  • A segregating F2 population of Arabidopsis thaliana derived from a cross between the late-flowering ecotype Hannover/Münden (HM) and the early-flowering ectoype Wassilewskija (WS) was analyzed for flowering time and other morphological traits. Two unlinked quantitative trait loci (QTLs) affecting days to first flower (DFF-a and DFF-b) mapped to chromosome 5. QTLs which affect node number (NN), leaf length at flowering (LLF), and lead length at 35 days (LL35) also mapped to chromosome 5; LLF-a, LL35-a, NN-a map to the same region of chromosome 5 as DFF-a; LLF-b and LL35-bmap to the same region of chromosome 5 as DFF-b. Another QTL affecting leaf length at flowering (LLF-c) maps to chromosome 3. The proximity of DFF-a, LLF-a, LL35-a and NN-a, as well as the similarity in gene action among these QTLs (additivity), suggest that they may be pleiotropic consequences of a single gene at this locus. Similarly, LL35-b and LLF-b map near each other and both display recessive gene action, again suggesting the possibility of pleiotropy. DFF-b, which also maps near LL35-b and LLF-b, displays largely additive gene action (although recessive gene action could not be ruled out). This suggests that DFF-b may represent a different gene from LL35-b and/or LLF-b. DFF-a maps near two previously identified mutants: co (which also affects flowering time and displays gene action consistent with additivity) and flc.(ABSTRACT TRUNCATED AT 250 WORDS)
  • Authors

  • Kowalski, Stanley
  • Lan, TH
  • Feldmann, KA
  • Paterson, AH
  • Status

    Publication Date

  • December 1, 1994
  • Keywords

  • Arabidopsis
  • Chromosome Mapping
  • Genetic Variation
  • Time Factors
  • Digital Object Identifier (doi)

    Pubmed Id

  • 7808406
  • Start Page

  • 548
  • End Page

  • 555
  • Volume

  • 245
  • Issue

  • 5