Population structure in Quercus suber L. revealed by nuclear microsatellite markers

Area of Science:

• Ecology
• Genetics
• Conservation Biology

Background:

• Quercus suber, a Mediterranean sclerophyllous tree, faces environmental changes like increased temperatures and drought.
• Understanding Quercus suber population genetics is crucial for predicting its adaptive capacity and resilience.

Purpose of the Study:

• To investigate the population structure and genetic diversity of Quercus suber across its native range.
• To clarify population patterns using nuclear microsatellite markers.

Main Methods:

• Genetic analysis of Quercus suber using 13 nuclear microsatellite markers.
• Sampling across 17 distinct locations representing the species' entire range.
• Structure analyses to infer population genetic clusters.

Main Results:

• Identified three major genetic clusters within Quercus suber populations.
• Observed complex population structure, differing from previous inferences.
• Highlighted significant genetic variation in southern Quercus suber populations.

Conclusions:

• Quercus suber's genetic structure is shaped by refugia isolation, admixture, and introgression from other Quercus species.
• High genetic diversity in southern populations may enhance Quercus suber's resilience to climate change.
• Results provide insights into the adaptive potential of Quercus suber under environmental pressure.