Molecular analysis of FRIGIDA, a major determinant of natural variation in Arabidopsis flowering time

• Vernalization, the acceleration of flowering by a long period of cold temperature, ensures that many plants overwinter vegetatively and flower in spring. In Arabidopsis, allelic variation at the FRIGIDA (FRI) locus is a major determinant of natural variation in flowering time. Dominant alleles of FRI confer late flowering, which is reversed to earliness by vernalization. We cloned FRI and analyzed the molecular basis of the allelic variation. Most of the early-flowering ecotypes analyzed carry FRI alleles containing one of two different deletions that disrupt the open reading frame. Loss-of-function mutations at FRI have thus provided the basis for the evolution of many early-flowering ecotypes.

Ämnesord

NATURVETENSKAP  -- Biologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Nyckelord

Sequence Deletion

Genetic

Amino Acid Substitution

Alleles

Arabidopsis/*genetics/physiology

*Arabidopsis Proteins

Cloning

Molecular

Plant

*Genes

Genes

Recessive

*Genetic Variation

Mutation

Open Reading Frames

Plant Proteins/chemistry/*genetics/physiology

Polymorphism

Polymerase Chain Reaction

Temperature

Publikations- och innehållstyp

art (ämneskategori)

ref (ämneskategori)