Update soybean Zhonghuang 13 genome to a golden reference

Dear Editor,Soybean is one of the most important crops worldwide.A high-quality reference genome will facilitate its functional analysis and molecular breeding (Wang and Tian,2015).Previously,we de novo assembled a high-quality Chinese soybean genome Gmax_ZH13 (Shen et al.,2018,Yang and Huang,2018).However,due to technical limitations at the time when we generated Gmax_ZH13,a large number of small contigs were not anchored onto chromosomes.Therefore,we here build a new golden reference genome for Zhonghuang 13 consisting of 20 nearly complete chromosomes by adding more single-molecule real time (SMRT) sequencing reads.Furthermore,we add large RNA-seq and smRNA-seq datasets for improving the annotation of its protein coding genes.