Skip to main content

Table 1 The geographic origin of the parent trees of the studied hybrid aspen genotypes

From: Spring and autumn phenology of hybrid aspen (Populus tremula L. × P. tremuloides Michx.) genotypes of different geographic origin in hemiboreal Estonia§

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