Application of Microsatellite Loci for Molecular Identification of Elite Genotypes, Analysis of Clonality, and Genetic Diversity in Aspen Populus tremula L. (Salicaceae)

Table 1

Elite aspen and hybrid clones and their characteristics.

Original genotype	Putative species/hybrid identity	Origin	Description	Clones and clonal lineages obtained based on original genotypes
PtV22	Putatively Populus tremula	Minsk Oblast, Belarus, breeding form obtained in Institute of Forest, National Academy of Belarus, Gomel, Belarus, provided by V. E. Padutov	Diploid green-bark aspen form. Characterized by fast growth and resistance to heart rot caused by pathogen fungus Phellinus tremula	Ptv22-1, Ptv22-2, Ptv22-3, 21mut, 2mut, 14mut, 4mut, 12mut
Pt	P. tremula	Leningrad Oblast, Russia, breeding form obtained in St. Petersburg Research Institute for Forestry, provided by D. A. Shabunin	Diploid giant aspen form. Characterized by fast growth and resistance to heart rot caused by pathogen fungus Phellinus tremula	Pt2, Pt3
F2	P. tremula	Kostroma Oblast, Russia, breeding form obtained by S. N. Bagayev, provided by D. A. Shabunin	Diploid female clone. Highly productive (plus 51% by sum of stem cross section squares and plus 43% by growing stock). Increased wood density of 475 kg/m^3[11]	F2-1, F2-2, F2-3
47	P. tremula	Latvian State Forest Research Institute “Silava,” Latvia, provided by Dr. Arnis Gailis	Diploid aspen form. Productivity of 180–200 m^3/haat age 12 under density of 1100 stems/ha. Characterized by resistance to heart rot caused by pathogen fungus Phellinus tremula [12]	47-1, 47-1-1-31, 47-1-1-22, 47-1-2-27, 47-1-1-19, 47-1-2-53
С-control	P. tremuloides × P. tremula	-“-	Diploid hybrid form. Productivity of 180–200 m^3/ha at age 12 under density of 1100 stems/ha [12]	С-1, С-2, С-3
23	P. tremuloides × P. tremula	-“-	Diploid hybrid form. Maximal productivity of 200–250 m^3/ha demonstrated at age 12 under density of 1100 stems/ha [12]. High wood density	L23-1, L23-2, L23-3
4	P. tremuloides × P. tremula	-“-	Maximal productivity of 250–300 m^3/ha demonstrated at age 12 under density of 2500 stems/ha [12]	L4-1, L4-2, L4-3
No. 3-understory	P. tremula	Republic of Tatarstan, breeding form by A. H. Gaziulllin, provided by N. R. Garipov	Triploid aspen form. Characterized by fast growth and resistance to heart rot caused by pathogen fungus Phellinus tremula	No. 3-understory-1