Linkage disequilibrium <i>r</i><sup>2</sup>, versus map distance in cM, for the <i>C. japonica</i> plus trees.

<p>(a) core collection (n = 456), (b) core collection (Pacific Ocean side (Q>0.8, n = 116)), (c) core collection (Japan Sea side (Q<0.2, n = 80)), (d) plus trees in Kanto Breeding Region (n = 367), (e) plus trees in Kanto Breeding Region (Pacific Ocean side (Q>0.8, n = 195),all samples (core collection and plus trees in Kanto Breeding Region (n = 731)).</p>