Phylogeography and population genetic structure of flowering cherry
Cerasus serrulata (Lindley) Loudon in subtropical and temperate China
Abstract
Cerasus serrulata (Rosaceae) is an important flowering cherry resource.
It is almost the most widely distributed species in the genus, mainly
included in the subtropical and temperate China, which enables the
geographic evolutionary pattern to be a representative. Besides, the
morphological traits are greatly varied especially in ornamental
characters. All of these makes Cerrasus serrulata a valuable research
object. Thus, phylogeographic analysis was conducted to apprehend the
spatial pattern and evolutionary history, which can also add insights
into the phylogeography of the genus Cerasus and plants in subtropical
and temperate China, as well as to deeper understand the genetic
diversity and structure of the germplasm to make better and more
effective utilization. A total of 327 individuals of 18 populations were
collected. Three cpDNA fragments (matK, trnD-E, trnS-G) and the nuclear
internal transcribed spacer (ITS) were utilized. The result showed a
high genetic diversity both in species level and population level of
Cerrasus serrulata. The high genetic differentiation among populations
and the existence of phylogeographic structure in whole were detected.
In addition, no bottleneck was identified. The the distribution pattern
and center were formed before the LGM. Two geographical lineages were
inferred. One was confined to Qingling Mountain and Taihang Mt. The
other was from the Wuling Mt to Lu-Huang Mt, and then went northeast to
the coast of Asia. Besides, taxonomic treatments of the Cerasus
serrulata complex were reconsidered.