“…Yield component traits affecting grain size, shape and weight have been the subject of extensive genetic studies in a number of crops aimed to identify genes controlling these traits (Song et al ., ; Takano‐Kai et al ., ; Segami et al ., ; Wang et al ., ; Wang et al ., ; Xie et al ., ; Wang et al ., 2018b). Recently, several genes contributing to grain size and/or weight including TaGW2 (Wang et al ., 2018a,b), TaCKX2 (Zhang et al ., 2012a), TaGASR7 (Zhang et al ., ), TaTGW‐7A (Hu et al ., ), and TaGW8 (Yan et al ., ) have been identified providing insights into the complexity of biological pathways that underlie regulation of grain size and weight in wheat. Many genes identified in wheat have rice homologs with similar function indicating that these developmental pathways are conserved among related grass species (Li and Li, ; Li et al ., ).…”