Tomato fruit weight controlled by Cell Size Regulator

Mu et al. mapped a QTL previously shown to control fruit weight in tomato, and named the responsible gene Cell Size Regulator (CSR). They found that CSR-D, the derived allele, increases cell size and is widespread in Solanum lycopersicum var. lycopersicum, but not in ancestral tomatoes with smaller fruit. The encoded protein is uncharacterized but contains a FAF domain, which has been identified previously in proteins that affect shoot meristem size. PLOS Genet.  10.1371/journal.pgen.1006930

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