This work was supported by grants from National Key Research and Development Program(2017YFC0505203);National Natural Science Foundation of China(31590821,31700323,and 41771055);Fundamental Research Funds for the Central Universities(2018CDDY-S02-SCU,SCU2019D013,and YJ201721).
Accurate species delimitation is fundamental to biodiversity conservation.The endangered spruce Picea brachytyla(Franch.)E.Pritz.was suggested to be polyphyletic based on a limited number of samples in previous studie...