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Báo cáo lâm nghiệp: "Genetic control of adventitious rooting on stem cuttings in two Pinus elliottii × P. caribaea hybrid families"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:"Genetic control of adventitious rooting on stem cuttings in two Pinus elliottii × P. caribaea hybrid families" | Ann. For. Sci. 62 2005 403-412 INRA EDP Sciences 2005 DOI 10.1051 forest 2005036 403 Original article Genetic control of adventitious rooting on stem cuttings in two Pinus elliottii X P. caribaea hybrid families Mervyn SHEPHERDa Rohan MELLICKa Paul TOONb Glenn DALEc Mark DIETERSb d a Cooperative Research Centre for Sustainable Production Forestry and Centre for Plant Conservation Genetics Southern Cross University Military Rd Lismore New South Wales 2480 Australia b Cooperative Research Centre for Sustainable Production Forestry and Department of Primary Industries - Forestry Fraser Road Gympie Queensland 4570 Australia c Tree Crop Technologies Pty Ltd 112 Alexandra Street Bardon Queensland 4065 Australia d Present Address School of Land and Food Science NRAVS The University of Queensland Brisbane Queensland 4072 Australia Received 1 April 2004 accepted 2 March 2005 Abstract - Genetic control of adventitious rooting was characterised in two unrelated Pinus elliottii X P. caribaea families an outbred F1 n 287 and an inbred F2 n 357 . Rooting percentage was assessed in three settings and root biomass was measured on a sub-set of clones n 50 from each family in the third setting. On average clones in the outbred F1 had a higher rooting percentage mean SE 59 1.9 and biomass mean SD 0.41 0.24 g than clones in the inbred F2 family mean SE 48 1.8 and mean SD 0.19 0.13 g . Genetic determination for rooting percentage was strong in both families as indicated by high individual setting clonal repeatabilities e.g. Setting 3 outbred F1 0.62 0.03 and inbred F2 0.68 0.02 H1 2 SE and the moderate-to- high genetic correlations amongst the three settings. For root biomass clonal repeatabilities for both families were lower outbred F1 0.35 0.09 and inbred F2 0.44 0.10 H2 SE . Weak positive genetic correlations between rooting percentage and root biomass in both families suggested a concomitant gain in root biomass would be insignificant when selecting solely on the more easily .