ARS | Publication request: RESISTANCE OF SOLANUM ANDIGENUM ACCESSIONS MAINTAINED AT VIR AND US POTATO GENEBANKS TO GOLDEN NEMATODE

Submitted to: American Journal of Potato Research
Publication Type: Abstract Only
Publication Acceptance Date: March 19, 2001
Publication Date: N/A

Technical Abstract: The best method for combating golden nematode, Heterodera rostochiensis, is the creation of varieties resistant to this pest. The cultivated potato species Solanum andigenum Juz. et Buk. has a great diversity of forms. Many forms are resistant to golden nematode. In 1998-2000 a joint evaluation of resistance to this pest was done on 115 accessions maintain simultaneously at N. Vavilov Institute and the US Potato Genebank, NRSP-6. Evaluation wa made by growing clones in a greenhouse in pots with soil infested with golden nematode cysts (RO2 and RO4) by the test method of the Plant Protection Institute. Fourteen accessions were found to be free of nematode cysts. Eight of these confirm resistance earlier noted by cooperators who screened the same materials from US Potato Genebank. The inheritance of resistance of the selected accessions was tested by evaluating the progeny from crosses with non-resistant cultivars. Resistance of 28 F1 combination nvaried from 35 to 78. The most frequent ratio of resistant to infected seedlings was 3:1, suggesting that resistance to nematode is dominant and monogenic. The majority of the selected resistant accessions were originally collected in Argentina.