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Ctpumpkin@optonline.net

There are more than a few Cucurbita varieties that exhibit resistance to Mosaic virus.

Has anyone ever seen a virus, then planted the following year & not had it return? Which genetic lines were grown?

I would like to contact growers who have either beaten Mosaic Virus or have experience in breeding for viral resistance in any cucrbit.

See:

Field Testing
The transgenic squash line CZW-3 was field tested in the United States (1993 – 1996). CZW-3 was extensively tested in the laboratory, greenhouse, and field experiments and based on these assessments it was determined that the plants exhibited the typical agronomic characteristics of the parent crookneck squash, with the addition of resistance to CMV, ZYMV and WMV2 infection. Field trial reports demonstrated that CZW-3 did not exhibit weedy characteristics, and had no effect on nontarget organisms or the general environment.

Outcrossing
Squash (C. pepo) and all other species of Cucurbita are monoecious (having both male and female flowers on the same plant) and produce heavy sticky pollen grains. Pollination requires an arthropod vector, usually a bee, to transmit the pollen from the staminate to the pistillate flower.

Interspecific hybridization has been extensively investigated and is well understood in the four cultivated species of C. pepo, C. mixta, C. moschata, and C. maxima. It is reported that F1 hybrids can be obtained in breeding programs, but only with difficulty and such hybrids are usually sterile. There is no evidence of spontaneous hybridization among these four species despite that fact that they have been grown side by side under cultivation for many generations (Whitaker & Robinson, 1986).

7/19/2006 10:12:45 AM

Ctpumpkin@optonline.net

So inter-crossings of existing resistant lines (families) aren't likely to work.

But if someone has noted a seed that didn't exhibit virus symptoms in a patch that was otherwise infected, we might have the genetics in our midst already.

7/19/2006 10:31:35 AM

Sioux Falls, SD garyboer@dakotalink.com

I have the mosaic virus
I have pulled my worst plants
Other plants just seem slow
But 1 plant, a volunteer, as yet has no symptoms
It has several pumpkins going
What are the chances???

7/19/2006 1:04:09 PM

Ctpumpkin@optonline.net

Gary,

I've finished the season on virus infected plants 2 out of 3 years. Last year the fruit grew so fast it exploded. But from late June the plants slow waaaaayyyy doooowwwwwnnnnn to the point they can never recover their full potential.

That one plant....is it a volunteer AG or is it a pepo?

7/19/2006 2:31:07 PM

Sioux Falls, SD garyboer@dakotalink.com

appears to be an AG
has a couple basketballs

7/20/2006 4:26:32 PM

Ctpumpkin@optonline.net

Let's save those seeds if you have confirmed that your other AGs are virus infected & this plant isn't.

7/20/2006 5:40:45 PM

Ctpumpkin@optonline.net

Gary, You have mail.

Steve

7/20/2006 5:43:39 PM

Cologne Brescia Italy

Steve, all my plants have the CMW, all years, I have to move my patch,but useless because the CMW arrive alike
Anyway the only problem that I have see, is the bad color of the leafes, light green and dark green spot, my best one (842 lbs)was grow in in 2003 in a CMW infect plant
Also this year I have the same problem, anyway I have a
550 lbs days 33 on the 1173 macari plant
A friend say me that with a CMW on the plant, I can to lose
a 30% in weight
Sergio

7/21/2006 12:20:22 PM

Hudsonville, Michigan (michiganpumpkins@sbcglobal.net)

Steve:
A local grower tells me that usually when his plants get the virus, they generally all get it. But his plants with 895 Hester in the lineage tend to get it later...
Frank

7/27/2006 11:16:30 AM

Danville, CA (petman2@yahoo.com)

I have seen great things from the Sherwood 768. Virus took one and a half La Rue but 3 Sherwood 768 (from Howard Dill) planted in the same area have none and are strong as can be.

7/28/2006 12:25:31 AM

No Place Special

Not sure what I have going on in my patch but it has taken out almost all my plants. I also planted many AG's in the field (minimum care) and all but one of them has it. The only field plant that dont have it is the 743 Moretti(sp?). This is a 1083 Frantz x 1370 Rose grown by moro (sergio). Today I pollinated it with my 1125 plant that is unaffected by the disease. Maybe there is a chance that the 743x1125 will be more resistant to this disease than many others? If it takes and I get seeds Im sure ill give it a try next year.

7/28/2006 10:09:26 AM