Cucurbit Genetics Cooperative Report 10:24 (article 15) 1987
Linkage Relationships of Watermelon Mosaic Virus-1
Resistance in Cucumber
Y.-J. Wang1 and R. W. Robinson
Horticultural Sciences Department, New York State Agricultural Experiment
Station, Geneva, NY 14456
R. Provvidenti
Plant Pathology Department, New York State Agricultural Experiment Station,
Geneva, NY 14456
'Wisconsin 2757' is a valuable source of multiple disease resistance
for cucumber (1). It is resistant to nine diseases, but is susceptible to
watermelon mosaic virus-1 (WMV-1). A source of resistance to WMV-1, due
to a single recessive gene, is 'Surinam' (2). 'WI 27571', 'Surinam', and
the F2 of this cross were tested for WMV-1 resistance (Wmv-1-1),
scab resistance (Ccu), powdery mildew resistance, spine color (B),
gynoecious sex expression (F), and bitterness (bi).
There was no significant association of wmv-1-1 with Ccu,
B, F, or powdery mildew resistance in the F2. Close
linkage was observed, however, between wmv- 1-1 and bi. There
were 86 susceptible, bitter F2 plants: 40 susceptible, nonbitter:
43 resistant, bitter: 1 resistant, nonbitter.
Classification for the nonbitter gene can be easily accomplished in the
seedling stage. Thus, bi may be a useful seedling marker for resistance
to watermelon mosaic virus-1.
Literature Cited
- Peterson, C. E., P. H. Williams, M. Palmer, and P. Louward. 1982.
Wisconsin 2757 cucumber. HortScience 17:268.
- Wang, Y.-J., R. Provvidenti, and R. W. Robinson. Inheritance of resistance
to watermelon mosaic virus 1 in cucumber. HortScience 19:582-588.
1 Present address: Beijing Vegetable Research Center, Beijing, China.
