IDENTIFYING NEW SOURCES OF GENES THAT DETERMINE CYCLIC FLOWERING IN ROCKY-MOUNTAIN POPULATIONS OF FRAGARIA-VIRGINIANA SSP GLAUCA STAUDT

The genes that determine cyclic flowering in all commercially grown cu ltivars of strawberry (Fragaria xananassa Duch,) were derived from a s ingle source of F. virginiana ssp, glauca from the Wasatch Mountains i n Utah. To broaden the germplasm base of cyclic flowering cultivars, w e evaluated the reproductive characteristics of 5 to 10 colonies of F. virginiana ssp, glauca from each of 32 Rocky Mountain sites ranging i n elevation from 700 to 2900 m. Populations at high and low elevations had high percentages of putative day neutrals with cyclic flowering ( 43% to 100%) and hermaphrodites (20% to 80%), although most hermaphrod ites were only partially fertile, There was also little association be tween elevation and crown numbers or flower number per cycle, but the total number of flowers per plant was negatively correlated with eleva tion, Fruit size was not significantly correlated with fruit number, W hen the data were subjected to a principal component analysis, two dis tinct groups were identified: one from the Black Hills of South Dakota and the other from low-elevation sites in Idaho and northwestern Mont ana. These patterns mirrored previously described patterns based on le af traits.