Resistance to Race 2 of Peronospora parasitica in U.S. Plant Introductions of Brassica oleracea var. capitata

in HortScience
View More View Less
  • 1 U.S. Department of Agriculture, Agricultural Research Service, U.S. Vegetable Laboratory, Charleston, SC 29414

Evaluations for resistance against race 2 of downy mildew, incited by Peronosporu parasitica Pers. ex Fr., were conducted on 325 U.S. Plant Introductions (PI) classified as Brassicu oleracea var. capitata L. (cabbage). A disease index (DI) was calculated for each entry. In 77 of the tested PIs, from 2% to 100% of the plants had reaction phenotypes ≥ 3. The DIs for 24 PIs were significantly lower than the DI for the most resistant cabbage control, `Headstart' (DI = 5.9). Eight of these PIs were highly resistant, because all plants had a reaction phenotype ≥ 3. However, most of these eight are apparently misclassified as B. oleracea var. capitata.

If the inline PDF is not rendering correctly, you can download the PDF file here.

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 88 33 6
PDF Downloads 58 25 5