Table 3. Comparison of results obtained using DNA markers to assess patterns of genetic variation in woody species native to Mexico (M) and southern South America (SA). P% indicates percentage of polymorphic loci, a measure of the extent of genetic variation within species. (All results obtained with RAPD markers, apart from *, obtained with inter-SSR markers; values in parentheses obtained with isozyme markers). All species are trees apart from Berberidopsis, which is a woody vine. (Adapted from Premoli et al. 2007.)

Species Region where native Sample size P (%) % of variation recorded between populations
Aextoxicon punctatum SA 283 63.7 12.1
Araucaria araucana SA 192 68.4 12.8
Berberidopsis corallina SA 44 15.1 54.8
Fagus grandifolia var. mexicana M 96 39.1 15.6
Fitzroya cupressoides SA 89
(720)
72.4
(61.9)
14.4
(8.3)
Legrandia concinna SA (148) (67) (41)
Luma apiculata SA (385) (90.9) (12.4)
Magnolia schiedeana* M 64 50.0 25.7
Magnolia sharpii* M 80 56.0 10.6
Pilgerodendron uviferum SA 192
(600)
35.7
(86)
18.6
(15.9)
Pinus chiapensis M 138 24.5 22.6
Podocarpus nubigena SA (260) (90.9) (21.6)
Podocarpus salignus SA 59 47.5 7.0