Fruit weight is controlled by Cell Size Regulator encoding a novel protein that is expressed in maturing tomato fruits.

ABSTRACT: Increases in fruit weight of cultivated vegetables and fruits accompanied the domestication of these crops. Here we report on the positional cloning of a quantitative trait locus (QTL) controlling fruit weight in tomato. The derived allele of Cell Size Regulator (CSR-D) increases fruit weight predominantly through enlargement of the pericarp areas. The expanded pericarp tissues result from increased mesocarp cell size and not from increased number of cell layers. The effect of CSR on fruit weight and cell size is found across different genetic backgrounds implying a consistent impact of the locus on the trait. In fruits, CSR expression is undetectable early in development from floral meristems to the rapid cell proliferation stage after anthesis. Expression is low but detectable in growing

SUBMITTER: Mu Q 

PROVIDER: S-EPMC5560543 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature