<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Hybrid poplar clonal growth in the states (regions) of Minnesota (MN), Indiana (IN), Michigan (MI), and New York (NY) USA was analyzed to discover 10 geographically robust (geo-robust) clones, all <italic>P. deltoides</italic> x <italic>P. nigra</italic> (D x N) hybrids previously tested and screened in MN, that were broadly adapted across latitudinal and longitudinal ranges of 9 and 20 degrees, respectively. The clonal effect for growth explained 25 to 36 % of the total variance, 2.5–4.1 times the clone x site interaction. Clone explained 24 to 46 % of total variation in canker occurrence on two sites. Genetic gain in growth was calculated relative to commercial check clones. Genetic gain in growth of geo-robust clones exceeded that of random clones by 24 to 44 %. Geo-robust clones and the best clones on each site were not significantly different on the MN sites, but best clones outperformed geo-robust clones on the other sites by 10 to 39 % genetic gain. Geo-robust clones grew faster than commercial check clones on all but the MI site. The reduction in genetic gain for growth due to using broadly adapted clones relative to the best clones has to be compared to the additional costs and benefits of multiple breeding zones.</p></abstract>

Hybrid poplar clonal growth in the states (regions) of Minnesota (MN), Indiana (IN), Michigan (MI), and New York (NY) USA was analyzed to discover 10 geographically robust (geo-robust) clones, all P. deltoides x P. nigra (D x N) hybrids previously tested and screened in MN, that were broadly adapted across latitudinal and longitudinal ranges of 9 and 20 degrees, respectively. The clonal effect for growth explained 25 to 36 % of the total variance, 2.5–4.1 times the clone x site interaction. Clone explained 24 to 46 % of total variation in canker occurrence on two sites. Genetic gain in growth was calculated relative to commercial check clones. Genetic gain in growth of geo-robust clones exceeded that of random clones by 24 to 44 %. Geo-robust clones and the best clones on each site were not significantly different on the MN sites, but best clones outperformed geo-robust clones on the other sites by 10 to 39 % genetic gain. Geo-robust clones grew faster than commercial check clones on all but the MI site. The reduction in genetic gain for growth due to using broadly adapted clones relative to the best clones has to be compared to the additional costs and benefits of multiple breeding zones.

Discovery of Geographically Robust Hybrid Poplar Clones

Department of Forestry and Natural Resources and Purdue Center for Plant Biology

U.S. National Arboretum, U.S. Department of Agriculture, Agricultural Research Service

Silvae Genetica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Discovery of Geographically Robust Hybrid Poplar Clones"}

Hybrid poplar clonal growth in the states (regions) of Minnesota (MN), Indiana (IN), Michigan (MI), and New York (NY) USA was analyzed to discover 10...

Discovery of Geographically Robust Hybrid Poplar Clones

Online veröffentlicht: 18. Nov. 2019

Seitenbereich: 101 - 110

DOI: https://doi.org/10.2478/sg-2019-0018

Schlüsselwörter
breeding zones, clonal adaptability, genotype x environment interaction, hybrid poplars, Populus

© 2019 Neil D. Nelson et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Discovery of Geographically Robust Hybrid Poplar Clones

Online veröffentlicht: 18. Nov. 2019

Seitenbereich: 101 - 110

DOI: https://doi.org/10.2478/sg-2019-0018

Schlüsselwörterbreeding zones, clonal adaptability, genotype x environment interaction, hybrid poplars, Populus

© 2019 Neil D. Nelson et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Schlüsselwörter
breeding zones, clonal adaptability, genotype x environment interaction, hybrid poplars, Populus