Identification of optimum planting density and row spacing for cylindrical garden beet varieties. Changes in RAPD marker frequencies across cycles of selection for pigment and sugar were assessed. The seventh cycle of divergent recurrent selection for pigment and sugar was completed. Replicated field experiments were conducted to determine the relative aster yellows resistance of 26 selected carrot breeding lines in comparison with 6 commonly-grown carrot cultivars. Significant reductions in aster yellows infection were observed in a large number of selected fines compared to standard cultivars.
Results demonstrate the effectiveness of inbreeding and selection for aster yellows resistance.
This breeding effort represents the first report of aster yellows resistant carrot germplasm. Pollinations involving Northern root-knot nematode resistant and susceptible carrot lines were carried out in the greenhouse winter nursery. Hybrid roots were produced, harvested, vernalized and planted in the winter nursery greenhouse for flowering in early 1994 to produce segregating generations for generic analysis. Characterization of an Allium platelet inhibitor. Proceedings of the National Onion Research Conference.