Down-expression of TaPIN1s Increases the Tiller Number and Grain Yield in Wheat

Abstract Background Tiller number is a factor determining panicle and grain yield in wheat ( Triticum aestivum ). Auxin plays an important role the regulation of branch production. PIN-FORMED 1 (PIN1), auxin efflux carrier, tiller rice Oryza sativa ); however, little known on roles PIN1 wheat. Results Nine homologs TaPIN1 genes were identified wheat, which TaPIN1-6 showed higher expression stem apex young leaf TaPIN1-6a protein was localized plasma membrane. The down-expression TaPIN1s increased TaPIN1-RNA interference TaPIN1-RNAi ) transgenic plants, indicating that might mediate axillary bud By contrast, spikelet number, per panicle, 1000-grain weight decreased plants compared with those wild type. In summary, reduction plant Conclusions Phylogenetic analysis structure nine proteins analyzed, subcellular localization located Knock-down lines. Our study suggests required for