ECOGENETIC VARIATION OF WHITE CLOVER (TRIFOLIUM-REPENS L) IN NATURAL-POPULATIONS IN THE MIDDLE OB REGION

The maximum lengths of seedlings of white clover were studied in two n onpolluted populations and two populations polluted with gas and oil i n the middle Ob region. Seeds were collected by families (i.e., separa tely from each maternal plant). The seeds were germinated in water, gi bberellin solution, or ammonium nitrate solution. In the course of ana lysis of variation, an ecological aftereffect was taken into account; this consisted of linear regression of the length of seedlings versus the seed mass in the family. The variation pattern of the trait appear ed to be the same in all populations: the effect of the germination me dium accounted for 72.5 - 83.1% of variation; that of the family, for 2.3 - 4.9%; and that of the medium-family interaction, for 2.6 - 4.1% of variation. The average lengths of the seedlings were higher for the polluted populations, irrespective of the germination medium. The res ults obtained are explained in terms of the conditions of plant growth in anthropogenically altered areas, which are not related to pollutio n.