naa a22 4500 510730914 CHVBK 20180411082952.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11295-013-0639-3 doi (NATIONALLICENCE)springer-10.1007/s11295-013-0639-3 Relationship of heartwood traits with diameter growth, implications for genetic selection in Pinus radiata [Elektronische Daten] [Stuart Kennedy, Alvin Yanchuk, Paul Jefferson] The heartwood of radiata pine (Pinus radiata D. Don) is not favoured commercially because of its darker appearance, unreliable durability and difficulty to treat chemically; consequently, light-coloured sapwood, which is more easily treated with decay-resistant chemicals, is of more value. To decrease the amount of heartwood or increase sapwood cross-sectional area by genetic selection, the genetics of sapwood cross-sectional area (SWA), sapwood area percentage (SWAP) and number of heartwood rings (HWR) is of interest. We investigated genetic variation in these three variables from increment cores from trees from two trial series, each planted at two sites, from a total of some 330 families (189 were half-sib and 142 were full-sib) with 10 to 30 individuals assessed per family. Trials were assessed between 16 and 23years old when all trees had started to develop heartwood. The three sapwood-related traits were moderately heritable across pairs of sites ( h ^ i 2 $$ {\widehat{h}}_i^2 $$ = 0.2 to 0.4) indicating opportunity for selection. SWA was strongly correlated (r a  = 0.9) with diameter. SWAP and HWR were also strongly correlated (r a  = −0.9). The number of HWR was independent of tree diameter, providing the opportunity through genetic selection to reduce heartwood area whilst increasing tree growth rate. Springer-Verlag Berlin Heidelberg, 2013 Radiata pine nationallicence Heartwood nationallicence Sapwood nationallicence Genetic correlation nationallicence Heritability nationallicence Genetic selection nationallicence Kennedy Stuart Scion, 49 Sala Street, Private Bag 3020, Rotorua, New Zealand aut Yanchuk Alvin Scion, 49 Sala Street, Private Bag 3020, Rotorua, New Zealand aut Jefferson Paul Radiata Pine Breeding Company Ltd., PO Box 1127, Rotorua, New Zealand aut Tree Genetics & Genomes Springer Berlin Heidelberg 9/5(2013-10-01), 1313-1319 1614-2942 9:5<1313 2013 9 11295 https://doi.org/10.1007/s11295-013-0639-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11295-013-0639-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kennedy Stuart Scion, 49 Sala Street, Private Bag 3020, Rotorua, New Zealand aut NATIONALLICENCE 700 1- Yanchuk Alvin Scion, 49 Sala Street, Private Bag 3020, Rotorua, New Zealand aut NATIONALLICENCE 700 1- Jefferson Paul Radiata Pine Breeding Company Ltd., PO Box 1127, Rotorua, New Zealand aut NATIONALLICENCE 773 0- Tree Genetics & Genomes Springer Berlin Heidelberg 9/5(2013-10-01), 1313-1319 1614-2942 9:5<1313 2013 9 11295 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer