Servizio Comunitario di Informazione in materia di Ricerca e Sviluppo - CORDIS

Arabidopsis frost tolerance

Seven QTLs affecting freezing tolerance have been identified by QTL mapping in the Ler/Cvi RIL population.Two QTLs (FTQ4 and FTQ6) showed effect under long and short day photoperiod, while the remainign five loci appear as photoperiod-dependent. Molecular analyses suggest that the CBF2 gene encoding an AP2-like transcription factor underlies the largest effect QTL, FTQ4. A 1.6 Kb deletion in the Cvi promoter region of CBF2 is suggested as the functional polymorphism causing a strong reduction of RNA expression.

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