Relict and peripheral tree populations may combine reduced within-population variation with strong among-population divergence, complicating conservation decisions. We combined a de novo draft genome assembly of Platycladus orientalis (~ 8.73 Gbp; N50 = 248,484 bp) with genotyping-by-sequencing data comprising 38,820 single-nucleotide polymorphisms from 95 individuals in seven Korean stands. Nucleotide diversity was higher in...