Heritability of several plant and flower characters in foxgflove (Digitalis sp.)
2005
Ardelean, M. | Costea, A. M. | Sestras, R. | Cordea, M.
The present paper contains experimental results obtained by testing four foxglove as well as the F1 generation obtained through crosses between these varieties, with the declared intention of creating a valuable new materiel in which the selection could be applied both for medicinal and ornamental purposes. Complete diallel crosses were performed in 2000 involving four foxglove cultivars. F1 hybrids were grown in two locations and, based on results obtained, heritability (both in wide and narrow sense) as well as general (GCA) and specific combining ability (SCA) were computed. There have been noted quite a few traits with a high heritability in wide sense (H=0.70-0.95). In very few instances the high values of wide sense heritability have accompained by appreciable values of narrow sense heritability. Additive effects of polygenes, emphasized by high GCA values in several characters, suggest that, in foxglove, for most of these characters, there might be found distinct groups of polygenes with negative ones. SCA showed significant values for most of plant and flower characters under study which could be a proof that, in foxglove, there are fair chances to develop commercial hybrids with an obvious heterosis in the expected direction (negative or positive).
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