Climate sensitivity of Cryptomeria japonica in two contrasting environments: Perspectives from QTL mapping

reported that the stem diameter growth of C. japonica occurred mostly between April and June. [36] investigated the radial growth patterns of 16 C. japonica populations across Japan, and reported that trees started to grow from April to May, peaking until around June, and decreased to almost zero after June. This tendency was also reported in other studies [35,56,57], indicating that our observations may reflect the seasonality of both growth patterns and gas exchange traits related to water demand of C. japonica, suggesting that stem diameter growth is probably influenced by water availability during early spring. Fig 3. Effect and location of significant QTLs for drought sensitivity at the Chiba site. Panel columns represent linkage groups. Panel rows represent two types of linkage maps based on the marker types (upper: YI96 map; lower: YI38 map). Short vertical lines at the bottom of each panel represent marker positions. https://doi.org/10.1371/journal.pone.0228278.g003 Table 1. List of significant QTLs identified for drought sensitivity at the Chiba site. Marker name Linkage group Linkage map Position (cM) Beta PVEa (%) m_1124 LG03 YI38 map 140.943 −0.171 12.4 m_1534 LG08 YI38 map 58.521 −0.083 2.9 m_1640 LG10 YI38 map 47.554 −0.080 2.7 m_0325 LG04 YI96 map 83.624 −0.076 2.5 m_1331 LG06 YI38 map 22.273 0.071 2.1 m_0149 LG02 YI96 map 105.401 −0.066 1.8 m_0708 LG10 YI96 map 0.000 −0.065 1.8 m_0788 LG10 YI96 map 104.723 0.061 1.6 m_1034 LG03 YI38 map 23.201 −0.060 1.5 m_1343 LG06 YI38 map 41.999 0.059 1.5

m_0031 LG01 YI96 map 33.557 0.054 1.2 m_0063 LG01 YI96 map 90.525 0.049 1.0 m_0817 LG11 YI96 map 18.205 0.046 0.9 a Phenotypic variance explained https://doi.org/10.1371/journal.pone.0228278.t001 Climate sensitivity of Cryptomeria japonica PLOS ONE | https://doi.org/10.1371/journal.pone.0228278 January 28, 2020 7 / 14