Search found 386 matches

by Larry Davis
Fri Nov 30, 2018 10:00 am
Forum: Rose Hybridizers Association Forum
Topic: RrGT1, a key gene associated with anthocyanin biosynthesis, was isolated from Rosa rugosa and identified via overexpress
Replies: 5
Views: 208

Re: RrGT1, a key gene associated with anthocyanin biosynthesis, was isolated from Rosa rugosa and identified via overexp

I think where they went astray was in accepting Zizhi as being "R rugosa" even while knowing that it is a hybrid. I'd say that's more a failure of the typical rose classification which bins things into groups that carry species names even when we know they' re hybrids. And secondarily that during tr...
by Larry Davis
Fri Nov 30, 2018 9:41 am
Forum: Rose Hybridizers Association Forum
Topic: Electron transport chain
Replies: 3
Views: 149

Re: Electron transport chain

Videos like that really recharge my battery. Good to see that someone is doing effective science communication. Now if they'd make one explaining how plants resist blackspot.....
by Larry Davis
Fri Nov 23, 2018 11:33 am
Forum: Rose Hybridizers Association Forum
Topic: Rising-Star-Honoree-David-Zlesak
Replies: 23
Views: 974

Re: Rising-Star-Honoree-David-Zlesak

Attempting to post a photo of #1100
by Larry Davis
Fri Nov 23, 2018 10:46 am
Forum: Rose Hybridizers Association Forum
Topic: Rising-Star-Honoree-David-Zlesak
Replies: 23
Views: 974

Re: Rising-Star-Honoree-David-Zlesak

Thank you David for a very clear description of the bad news. And the possibility of some good. Happy Thanksgiving holiday weekend. Yesterday I had some time to sort roses for winter storage (putting pots below ground level and adding leaves). Came a cross a young bush in the making, of Brite Eyes x...
by Larry Davis
Tue Nov 20, 2018 6:42 pm
Forum: Rose Hybridizers Association Forum
Topic: Rising-Star-Honoree-David-Zlesak
Replies: 23
Views: 974

Re: Rising-Star-Honoree-David-Zlesak

Very good David. I'm glad the ARS notices rose breeders who aren't corporate employees.
by Larry Davis
Sat Nov 17, 2018 8:34 pm
Forum: Rose Hybridizers Association Forum
Topic: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)
Replies: 15
Views: 483

Re: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)

I especially like the yellow. Does it keep its color better than Carefree Sunshine and Carefree Sunshine? Fading is the thing that's gotten me with those as parents. No duration of bright yellow before it goes to white in OP and many crosses. So far my best yellows come from First Impression and Soe...
by Larry Davis
Fri Nov 16, 2018 10:04 pm
Forum: Rose Hybridizers Association Forum
Topic: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)
Replies: 15
Views: 483

Re: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)

Don't have much of interest to report on Brite Eyes. Only one seedling so far has made it into my book of numbered plants. That was a yellow single with a red edge that develops in sun. I do have one or two seedlings each with Austrian Copper pollen or R pomifera pollen. Waiting for those to bloom. ...
by Larry Davis
Wed Nov 14, 2018 11:44 pm
Forum: Rose Hybridizers Association Forum
Topic: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)
Replies: 15
Views: 483

Re: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)

Brite Eyes has been good rose for me so far, thought not so hardy as I'd like. I was surprised that both it and High Voltage froze nearly to the ground with a -10 F chill a couple nights. Reasonably fertile, tested only as female so far. Only problem is that it tends to singleness and the pale cente...
by Larry Davis
Sun Oct 21, 2018 8:50 pm
Forum: Rose Hybridizers Association Forum
Topic: Harvested hips
Replies: 38
Views: 2197

Re: Harvested hips

Sorry i wasn't clear enough. I didn't mean that simple hydration (imbibition) would split achenes, but the swelling that results from the uptake of water during the initiation of germination. That is when the cotyledons begin to enlarge so that they can open out, turn green and begin photosynthesis....
by Larry Davis
Sat Oct 20, 2018 8:15 pm
Forum: Rose Hybridizers Association Forum
Topic: Harvested hips
Replies: 38
Views: 2197

Re: Harvested hips

I doubt that amylase would have any effect on anything because there is no free starch in the achene outer coat. It is all pectins of one sort or another at the suture. that requires a pectinase such as the drisilase mixture contains. Lipase would not likely get into the actual seed coat. I have no ...
by Larry Davis
Sun Sep 16, 2018 10:17 pm
Forum: Rose Hybridizers Association Forum
Topic: Blazes of light reveal how plants signal danger long distances
Replies: 2
Views: 266

Re: Blazes of light reveal how plants signal danger long distances

My observation, lots of botanists are a bit rrrright or lefffft of center. We've had a few here at K-State. Wisconsin has had more than their share through the years. For instance Hugh Iltis (evolution of maize) and Folke Skoog (M.S. medium).I see that Gilroy was educated at Edinburgh.
by Larry Davis
Wed Sep 12, 2018 11:26 pm
Forum: Rose Hybridizers Association Forum
Topic: looking for a paper
Replies: 1
Views: 232

Re: looking for a paper

I think I've located it. Give me a couple days + your e-mail address in a P.M. to ldavis located at ksu.edu
by Larry Davis
Mon Sep 03, 2018 10:53 am
Forum: Rose Hybridizers Association Forum
Topic: Regarding ancestry
Replies: 10
Views: 651

Re: Regarding ancestry

Yes, Karl, you are absolutely correct on the likelihood in small samples. But until Gosset, no one knew that, at least in a simple way. And Mendel only looked for regularity of pattern, not quantitative evidence. For the large majority of small samples he would be close enough to convince himself an...
by Larry Davis
Sun Sep 02, 2018 3:43 pm
Forum: Rose Hybridizers Association Forum
Topic: Regarding ancestry
Replies: 10
Views: 651

Re: Regarding ancestry

Karl, I'm not sure I agree with you about Mendel. He studied physics at a very good university in Vienna and had a good grasp of the statistics of his time. But they were Bayesian. If you know a prior probability, you can with some reasonable confidence predict the next outcome. Like the probability...
by Larry Davis
Sun Sep 02, 2018 3:09 pm
Forum: Rose Hybridizers Association Forum
Topic: paper request on anthocyanins
Replies: 2
Views: 243

Re: paper request on anthocyanins

Thank you Don for saving me the effort of searching for this. After our library fire it is a challenge to get off-site items brought back to scan.
by Larry Davis
Fri Aug 24, 2018 9:42 pm
Forum: Rose Hybridizers Association Forum
Topic: Easy Propagation
Replies: 12
Views: 809

Re: Easy Propagation

Maybe they forgot to mention that the key ingredient here is actually zinc cinnamate produced when the nail leave some zinc that reacts with the active ingredient in the cinnamon. If someone will send me a dozen roses, I'll provide the spuds and do a completely blind test of zinc, iron,copper and al...
by Larry Davis
Mon Aug 13, 2018 7:59 pm
Forum: Rose Hybridizers Association Forum
Topic: Thread about rose rosette virus in commercial roses
Replies: 5
Views: 534

Re: Thread about rose rosette virus in commercial roses

This does make me just a little nervous. AS I mentioned on a thread earlier this year, I got Easy on the Eyes for $4 at Menards ( a big midwestern hardware chain). They had 2 whole pallets, at least 2 cu yd deep boxes, full of bagged roses labeled # 1&1/2. But what I bought looked like it was #1 gra...
by Larry Davis
Thu Aug 02, 2018 8:31 pm
Forum: Rose Hybridizers Association Forum
Topic: Moving micro minis indoors
Replies: 10
Views: 550

Re: Moving micro minis indoors

I can see that beating mite eggs is really hard. And unfortunately the microwave will not kill the eggs directly, just as it won't kill cockroaches. They have to be poached by the steam or directly hard boiled. Sometimes quick-freezing will kill insects, though the eggs may be full of antifreeze mol...
by Larry Davis
Thu Aug 02, 2018 8:26 pm
Forum: Rose Hybridizers Association Forum
Topic: Disease resistance
Replies: 4
Views: 329

Re: Disease resistance

Back a few decades ago someone named Joe Kuc (not sure of spelling last name) discovered systemic acquired resistance in plants. He was a plant pathologist in Kentucky and came here to give a talk in our PlPath dept. I visited with him for an hour or so. In the instance he was studying the resistanc...
by Larry Davis
Thu Jul 26, 2018 7:22 pm
Forum: Rose Hybridizers Association Forum
Topic: Moving micro minis indoors
Replies: 10
Views: 550

Re: Moving micro minis indoors

My usual problem going from outdoors to indoors is spidermites on roses. Thrips can be a problem with other plants but doesn't seem to be much with roses, other than eating pollen. I just whack the plants and let them grow back outdoors while the cuttings are under lights in a nice, "sterile" pottin...