Table 1 The geographic origin of the parent trees of the studied hybrid aspen genotypes
P. tremula origin country | Country abbreviation | No. of entries | Plant type | Geographic origin of parents | |
|---|---|---|---|---|---|
P. tremula L. | P. tremuloides Michx. | ||||
Latvia | LV | 7 | Clone | ♂ 56° 06′ to 57°10′ N | ♀ 56°40′ N, botanic garden in Latvia (North American origin is unknown) |
Sweden | SE | 5 | Clone | ♀ 55° 53′ to 57° 31′ N | ♂ 45° to 50° N, the Great Lakes region |
Germany | DE | 6 | Full-sib families | ♀ 51° 16′ to 52° 16′ N | ♂ 44° N, New Hampshire |
Finland | FI | 4 | Clone | ♀ 60° 22′ N | ♂ 45° 17′ N, Ontario 54° 06′ N, British Colombia |