caa a22 4500 475794516 CHVBK 20180406123720.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/s001220051510 doi (NATIONALLICENCE)springer-10.1007/s001220051510 Variation in pollen viability among Picea abies genotypes - potential for unequal paternal success [Elektronische Daten] [T. Nikkanen, T. Aronen, H. Häggman, M. Venäläinen] Abstract : An in vitro germination method was used to study variation in pollen viability, that is pollen-tube growth rate together with germination percentage, among the Picea abies genotypes in a seed orchard. The method permits easy, rapid screening of large numbers of genotypes. Significant variation in pollen viability among the genotypes was evident, the differences among the pollen-lot means being 7-10-fold in different years. No correlation was found between the average pollen viability and the phenology, growth or growing-site characteristics of the pollen donors. However, there appeared to be pollen lots that either benefit from a higher germination temperature or else germinate faster at lower temperatures. The significant variation in pollen viability among the pollen donors indicates a potential for male gametophyte competition. This, together with the observed genotype-environment interactions in pollen performance, may contribute to the variable genetic composition of seed produced in the seed orchard. Springer-Verlag Berlin Heidelberg, 2000 Key words Norway spruce nationallicence Pollination nationallicence Germination of pollen nationallicence Pollen-tube growth nationallicence Functioning of seed orchard nationallicence Nikkanen T. Punkaharju Research Station, FIN-58450 Punkaharju, Finland e-mail: teijo.nikkanen@metla.fi Tel.: +358-15-730 220, Fax: +358-15-644 333, FI aut Aronen T. Punkaharju Research Station, FIN-58450 Punkaharju, Finland e-mail: teijo.nikkanen@metla.fi Tel.: +358-15-730 220, Fax: +358-15-644 333, FI aut Häggman H. Punkaharju Research Station, FIN-58450 Punkaharju, Finland e-mail: teijo.nikkanen@metla.fi Tel.: +358-15-730 220, Fax: +358-15-644 333, FI aut Venäläinen M. Punkaharju Research Station, FIN-58450 Punkaharju, Finland e-mail: teijo.nikkanen@metla.fi Tel.: +358-15-730 220, Fax: +358-15-644 333, FI aut https://doi.org/10.1007/s001220051510 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220051510 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nikkanen T. Punkaharju Research Station, FIN-58450 Punkaharju, Finland e-mail: teijo.nikkanen@metla.fi Tel.: +358-15-730 220, Fax: +358-15-644 333, FI aut NATIONALLICENCE 700 1- Aronen T. Punkaharju Research Station, FIN-58450 Punkaharju, Finland e-mail: teijo.nikkanen@metla.fi Tel.: +358-15-730 220, Fax: +358-15-644 333, FI aut NATIONALLICENCE 700 1- Häggman H. Punkaharju Research Station, FIN-58450 Punkaharju, Finland e-mail: teijo.nikkanen@metla.fi Tel.: +358-15-730 220, Fax: +358-15-644 333, FI aut NATIONALLICENCE 700 1- Venäläinen M. Punkaharju Research Station, FIN-58450 Punkaharju, Finland e-mail: teijo.nikkanen@metla.fi Tel.: +358-15-730 220, Fax: +358-15-644 333, FI aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer