Abstract
Using genome-wide SNP data obtained from high-throughput techniques based
on a double digest restriction site-associated DNA sequencing (ddRAD-seq),
we elucidated the migration history and genetic diversity of the
ecologically important red seaweed Gelidium elegans Kuätzing in
Japan. STRUCTURE and NeighborNet analyses showed a clear genetic
differentiation among three geographic regions: Sea of Japan and Pacific
coast of Tohoku region (POP1), Mie and Kochi (POP2), and Shizuoka and
Chiba (POP3). Approximate Bayesian Computation (ABC) analysis indicated
that POP1 diverged first, followed by a separation of remaining
populations into POP2 and POP3. Low genetic diversity was detected in
POP1, whereas high genetic diversity was detected in POP2 and
POP3.
