naa a22 4500 510730515 CHVBK 20180411082951.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11295-012-0588-2 doi (NATIONALLICENCE)springer-10.1007/s11295-012-0588-2 Genetic information from progeny trials: a comparison between progenies generated by open pollination and by controlled crosses [Elektronische Daten] [Henrik Hallingbäck, Gunnar Jansson] When conifer progenies generated by open pollination are assessed in field tests, it is usually assumed that all progenies of the same mother are true half-sibs. This assumption may be invalid, leading to overestimation of additive genetic variation and heritability and to biased breeding values. From one Scots pine (Pinus sylvestris) and one Norway spruce (Picea abies) seed orchard, containing 28 and 36 parent clones, respectively, progenies generated by open pollination (OP) and by controlled crosses (CC) were planted in adjacent trials at two to three sites in southern Sweden. The tree height and diameter at breast height were measured, and genetic parameters based on these traits were estimated for OP and CC progenies separately, in order to enable comparisons. Narrow-sense heritability estimates for Scots pine and Norway spruce OP progenies (in the ranges 0.04-0.13 and 0.15-0.38, respectively) did not differ significantly from CC estimates (0.07-0.12 and 0.23-0.30), suggesting that OP-based heritability values were not overestimated to any great extent. Similarly, genetic correlations between OP and CC progenies were in the ranges of 0.87-0.88 and 0.74-0.77 for Scots pine and Norway spruce, respectively, being significantly lower than unity only in the case of Norway spruce. OP-based breeding values for both species should therefore correspond well with those predicted from CC progenies, albeit not perfectly for Norway spruce. In conclusion, the assumption of true half-sibs for OP progenies was not violated to the extent that genetic parameter estimates or breeding value predictions were seriously biased. Springer-Verlag Berlin Heidelberg, 2013 Scots pine nationallicence Norway spruce nationallicence Coancestry nationallicence Genetic parameters nationallicence Open pollination nationallicence Controlled crossing nationallicence Hallingbäck Henrik Department of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, PO Box 7080, 750 07, Uppsala, Sweden aut Jansson Gunnar Department of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, PO Box 7080, 750 07, Uppsala, Sweden aut Tree Genetics & Genomes Springer-Verlag 9/3(2013-06-01), 731-740 1614-2942 9:3<731 2013 9 11295 https://doi.org/10.1007/s11295-012-0588-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11295-012-0588-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hallingbäck Henrik Department of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, PO Box 7080, 750 07, Uppsala, Sweden aut NATIONALLICENCE 700 1- Jansson Gunnar Department of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, PO Box 7080, 750 07, Uppsala, Sweden aut NATIONALLICENCE 773 0- Tree Genetics & Genomes Springer-Verlag 9/3(2013-06-01), 731-740 1614-2942 9:3<731 2013 9 11295 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer