caa a22 4500 475796101 CHVBK 20180406123724.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1007/s001220051393 doi (NATIONALLICENCE)springer-10.1007/s001220051393 Effects of temperature and pollination site on pollen performance in Betula pendula Roth - evidence for genotype-environment interactions [Elektronische Daten] [H-L. Pasonen, M. Käpylä, P. Pulkkinen] Abstract : We studied whether the differences between genetically different pollen donors (Betula pendula Roth clones) with respect to pollen-tube growth rate were consistent under different thermal conditions during pollen germination in vivo and in vitro. We conducted a single-donor hand-pollination experiment with same pollen donors and recipients in a plastic house seed orchard and at an outdoor clone collection. The prevailing daily mean temperature during pollen germination was 13°C higher in the plastic house than outdoors. The pollen-tube growth rate of each pollen donor was additionally determined in vitro on agar medium at five temperatures (10°, 15°, 22°, 30° and 35°C). A significant interaction between paternal clone and pollination site as well as between paternal clone and temperature was found, which provides evidence for genotype-environment interactions. Genotype-environment interactions can have evolutionary significance in maintaining the variation in pollen-tube growth rates. At seed orchards, genotype-environment interactions can cause deviations from the expected genetic composition of the seed crop depending on the prevailing environmental conditions during pollen-tube growth. Springer-Verlag Berlin Heidelberg, 2000 Key words Pollen-tube growth rate nationallicence Pollen competition nationallicence Temperature nationallicence Seed orchard nationallicence Betula pendula Roth (silver birch) nationallicence Pasonen H-L University of Jyväskylä, Department of Biological and Environmental Science, P.O.Box 35, FIN-40351 Jyväskylä, Finland e-mail: hapasone@dodo.jyu.fi Fax: +358-14-2602321, FI aut Käpylä M. University of Jyväskylä, Department of Biological and Environmental Science, P.O.Box 35, FIN-40351 Jyväskylä, Finland e-mail: hapasone@dodo.jyu.fi Fax: +358-14-2602321, FI aut Pulkkinen P. The Finnish Forest Research Institute Haapastensyrja˘ Breeding Centre, Karkkilantie 247, FIN-12600, Läyliäinen, Finland, FI aut https://doi.org/10.1007/s001220051393 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220051393 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pasonen H-L University of Jyväskylä, Department of Biological and Environmental Science, P.O.Box 35, FIN-40351 Jyväskylä, Finland e-mail: hapasone@dodo.jyu.fi Fax: +358-14-2602321, FI aut NATIONALLICENCE 700 1- Käpylä M. University of Jyväskylä, Department of Biological and Environmental Science, P.O.Box 35, FIN-40351 Jyväskylä, Finland e-mail: hapasone@dodo.jyu.fi Fax: +358-14-2602321, FI aut NATIONALLICENCE 700 1- Pulkkinen P. The Finnish Forest Research Institute Haapastensyrja˘ Breeding Centre, Karkkilantie 247, FIN-12600, Läyliäinen, Finland, FI aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer