“…Twenty-six of the thirty-seven reports showed an association between Ca deficiency and/or Ca accumulation and the expression of Ca 2+ -movement-related genes (Ca 2+ antiporters [27,29,32,35,36,39,[42][43][44][45][46][47][48][49][50]53], calreticulin [30,[51][52][53], Ca 2+ -ATPase [35,36,39,54,55], Ca 2+ channels [55][56][57][58], and PME [35,59]). Of the remaining studies, five studies identified QTLs that described variation in tipburn incidence [25,26,33,34,38]. Two studies investigated the causative genes of Ca deficiency disorders and Ca accumulation by focusing on morphological traits (leaf shape [28] and root hair production [61]).…”