Funding for this research was provided by:
National Natural Science Foundation of China (31421063)
“111” Program of Introducing Talents of Discipline to Universities (B13008)
National Key R&D Program of China (2017YFA0605100)
Received: 6 November 2020
Accepted: 23 April 2021
First Online: 18 May 2021
: All the plant materials were sampled from natural populations in North and Northeast China and no specific permission was needed to collect such samples. This study was conducted in accordance with local legislation and the Convention on the Trade in Endangered Species of Wild Fauna and Flora.
: Not applicable.
: The authors declare that they have no competing interests.