About Us
Conservation & Horticulture
Public Education
Graduate Study
International Cooperation
Annual Reports
Publications & Papers
Visit XTBG
XTBG Seminar
Open Positions
4th XSBN Symposium
PFS-Tropical Asia
   Location:Home > Research > Research Progress
Study validates local adaptation of sawtooth oak tree of subtropical China
Author: Gao Jie
Update time: 2020-03-16
Text Size: A A A

Quercus acutissima (sawtooth oak) is a dominant species occupying a wide range of environmental conditions in subtropical and warm temperate zones in China. Owing to its high ecological and economic value, it has been listed as a precious timber species in China. Populations of this species can persist across large temperature and precipitation ranges. However, the geneticbased climate adaptation in Q. acutissima remains unclear. 

In a study published in Journal of Systematics & Evolution, researchers from Xishuangbanna Tropical Botanical Garden (XTBG) combined a common garden experiment with rangewide population genomics analyses to infer the demographic history and characterize patterns of local adaptation in the sawtooth oak.  

The researchers surveyed approximately 8% of the oak genome and recovered 55?361 single nucleotide polymorphisms (SNPs)  from sampled populations of Q. acutissima. Those sites included a balanced proportion of both genic and noncoding regions. Genetic structure and principal component analysis of these populations indicated an eastwest split. 

Coalescentbased model simulations inferred a late Pleistocene divergence in Q. acutissima between the east and west groups as well as subsequent preglaciation population expansion events. 

Moreover, the genetic and phenotypic analyses revealed a joint effect of geography and environment on Q. acutissima. 

“To our knowledge, this study is the first to attempt to combine a genome scan and phenotype evaluation in a common garden in an Asian subtropical oak species; it will provide a valuable study system to compare with temperate oaks in North America and Europe”, said Dr. GAO Jie, first author of the study. 

The approach, which combined a common garden experiment with landscape genomics data, validated the hypothesis of local adaptation of the longlived oak tree of subtropical China. 


GAO Jie Ph.D 

Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan 666303, China
E-mail: gaojie@xtbg.org.cn

  Appendix Download
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences. Menglun, Mengla, Yunnan 666303, China
Copyright XTBG 2005-2014 Powered by XTBG Information Center