Map positions of SFR genes in relation to other freezing-related genes of Arabidopsis thaliana

We determined the map positions of seven SFR genes and compared them to the positions of 51 genes suspected of involvement in freezing tolerance in Ar abidopsis thaliana. The SFR genes were recognized by the freezing sensitivi ty of mutants; the others (including 14 whose map positions we have determi ned) were genes whose expression is induced by low temperature, genes invol ved in abscisic acid (ABA) biosynthesis and perception, and genes involved in tolerance of oxidative stress. The comparison of map positions indicated a limited set of potential identities, some of which were eliminated by fu rther mapping or by an allelism test.