Correction: Combined bulked segregant sequencing and traditional linkage analysis for identification of candidate gene for purple leaf sheath in maize

• Pengcheng Li, 
• Cancan Du, 
• Yingying Zhang, 
• Shuangyi Yin, 
• Enying Zhang, 
• Huimin Fang, 
• Dezhou Lin, 
• Chenwu Xu, 
• Zefeng Yang