DMV has frustrated the virus researchers for many years now. Perhaps we will be hearing from them in the future. The issue is false positives as the dahlia has incorporated some of the DMV genes into it's genome. Those genes caused the false positives. I do not know that they have eliminated this issue, DMV used to be one of the worst ones for negative symptoms but this confusion implies that it may be something that may not cause symptoms in many plants. Our virus peron says the general rule is to test when you see symptoms.
Hybridizing Dahlias
7 days later
I spoke with two researchers this week and I'm sending off plant and seed samples for them to investigate. I'm sending both positive and negative plants, seedling siblings, and seed parents. Each researcher has a different objective but I would like to see if one will isolate which DMV strain is present.
I expect DMV+ results given it hasn't been tested for in previous seasons but I am alarmed at the number of asymptomatic positives in the first year seedling field.
In 5 years we'll know so much more.
A Bracken Glenda seedling. Seed sourced from a friend in Australia. BG has been a reliable seed parent for fully double formal decoratives. Tubers are 50/50 for being suboptimal or good.
All first year seedlings have now been dug. Because this one was over 7 feet tall and still had nice flowers on it, today we stopped the digging and took some cell phone snapshots. Then we proceeded to disagree whether it was a waterlily or an informal decorative. Waterlilies are supposed to have only 7 rows of developed petals. This flower has a couple more than that. She says we can call it a waterlily and perhaps call it a waterlily type. The picture supports her appraisal of the form and I shall now agree with her. Orange color is very bright and evenly distributed. It had a very sturdy stalk too.
Other then the fact of agreeing on what the perimeters of a form are, is there a good reason to restrict the number of rows on a waterlily? It seems like more rows would allow it more days as a cut flower...more rows to open and replace back petals as they die off....
Waterlilies with few too many rows do make nice arranger's flowers according to Margaret. Perhaps an arrangement in competition could be called cut flowers on steroids.
4 days later
This seedling did especially well this year; over 6 feet tall, always several nice flowers on the plants. And it is a pleasing bicolor of lavender pink with light pink tips.
Teddahlia what’s the bloom size on this one? I love the form and the color combo.
I would brag if it was a B or an A or especially if it were a giant dahlia. Alas, it is a full sized BB dahlia and the largest flowers are approaching 6 inches but the majority are at the 5 inch mark. It is remarkable for it's light pink tips on the end of the petals. Here is another picture showing a display of numerous flowers. And the plants were not groomed or disbudded.
I am responding to Bessie who wanted to see seedling pictures. 
I took some pictures of some "random" seedlings. Which one(s) would you keep?
, thank you! I was wondering if all of your seedlings were incredible. Even though you have said a tiny percentage of seedlings are saved, I was losing perspective. 
We have not talked about collecting seeds very much. With no seeds there are no seedlings. Over the years some of our very best ones have come from the hand crosses done by Margaret. Alas, this is a year off for her, as it takes well over 100 hours of work to do a decent batch of properly done hand crossed seeds and we must be satisfied with collecting seeds from her hand crosses from previous years. The preparation for the dahlia tour wore her out. Seeds from hand crosses is a new "trick of the trade" as we decided that if all these hand crossed waterlilies that may or may not be really good ones, came from only from only good seed parents, We went through the hand crossed seedlings and selected seeds from the ones that had things we like and not too many things we did not like. An example would be an exotic color combination or a really vigorous plant. And of course we collect seeds from our named plants planted strategically by other special plants too. We need enough seeds to produce about 1050 seedling plants.
Every year I see people saying, "I just want to plant some seeds to see what I will get. I do not care if they have perfect form and I know there will lots of different colors. " I believe that the most experienced breeder has a streak of this philosophy. I have a row for the giants and large dahlias. Somehow a Hollyhill Snowcap pom tuber was planted in that row(and grew taller than the giants around it) and I collected some seeds from it. Not very many seeds were there but what will these special seeds make? 
Not very many seeds were there but what will these special seeds make?
Ted, thank you for your insights. That question you asked is what keeps me going!
I've decided I can't grow hundreds of seedlings (at least how I grew 88 seedlings this year), so going forward I will need to concentrate on hand crosses of the best perceived seed parents with desired pollen parents.
I have not marked any of the crosses I've performed. However, every day I'm home, I try to go out twice a day(I'm retired) and collect pollen and then transfer it to what looks like mature, receptive stigmas.
At the beginning of the season I made some collection envelopes ( one for each variety) out of cardstock paper, so that I could reuse them. But, after a few weeks, I realized that storing pollen overnight (which I sometimes do) did not work very good. I dug out the little plastic containers I purchased last season for pollen storage. I have found them to work really well for collecting, moving pollen around my yard, and storing pollen.
36 Pieces Rectangle Clear Plastic Containers Transparent Beads Storage Containers Box Jewelry Storage Box Case with Hinged Lid for Small Items Beads Jewelry (1.3 x 1.3 x 0.7 Inches) https://a.co/d/cgv4x7e
When we first started to handcross. I attempted to compare them to our other seedlings . I found that it increased the odds by about 30% that we would retain a seedling a second year. In those days we were crossing named varieties not bred by us. Last year Margaret did quite a few hand crosses and I would say the percentage of keepers was a bit more than 30% . But there are keepers and there are KEEPERS. That means the very best are much better than what could be achieved by the bees doing the work. And our non hand crossed seedlings are now 4, 5 or 6 generations of our breeding and are much better too. Some really nice ones are bee pollinated (and even some waterlilies) and are very good. and comparable to the hand crossed results. It is just that there there is lower percentage of them but since we grow more of the non crossed seedlings, we select more non hand crossed seedlings to keep than hand crossed seedlings. It is still a matter of growing lots of seedlings because the octoploid dahlia is so variable. Diploid breeding is a snap compared to octoploid breeding. 
Getting ready to place flagging tape on a waterlily seedling