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Messages - Gilbert Fritz

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1
Those citron patterns look like the patterns I got in my patch.

2
Plant Breeding / Re: Is male sterility in brassicas dominant?
« on: 2018-12-12, 08:03:56 AM »
Thanks, that makes sense.

3
Plant Breeding / Is male sterility in brassicas dominant?
« on: 2018-12-11, 05:16:18 PM »
I've been thinking about male sterility in brassicas. When seed is saved from a male sterile F1 (which by definition myst have been pollenated by a male fertile plant) what will happen in the F2? As I understand it, all the plants will be male sterile. Why would this be?

4
Plant Breeding / Re: Homestead Potato Breeding and Selection
« on: 2018-12-05, 08:46:49 AM »
Quote
If by dry farming, you mean no irrigation, then I dry farm everything I grow.  I only water at time of transplanting seedlings.  That will limit yields with many crops, however, including potatoes.  Potatoes mostly like regular watering.

And I'm in a much more arid location. But, this guy is growing dry-farmed (no irrigation) potatoes and other vegetables on 12 inches of rain. On the other hand, he has a somewhat cooler climate than I do. http://bobquinnorganicfarmer.com/dry-land-vegetables/

I'd guess that a targeted breeding program would end up with potatoes that ran roots much further from the center of the plant to capitalize on the wide spacing of dryland farmed plants.

5
Plant Breeding / Re: Homestead Potato Breeding and Selection
« on: 2018-12-04, 04:03:33 PM »
I thought that potatoes were strongly outcrossing; is this not the case?

From the Cultivariable site:

Quote
The potato of commerce is tetraploid, bearing four copies of each chromosome, resulting in a sort of built-in hybrid vigor that typically allows them to grow larger and yield more than diploids.  Potatoes are outbreeders and experience inbreeding depression.  As a result, they do not grow true from seed.  Every potato plant grown from TPS is genetically different.

How do they become selfed and inbred if they are outbreeding?

My interest in TPS is different now from a few years ago. A few years ago, I was very interested in breeding a "tower potato." I now think this may be impossible, and besides, I'm not sure if it is desirable.

I'm now more interested in the fact that the native climate of some potato species and varieties is rather like the high desert climate of Colorado, and that potatoes can be dry farmed. I'm also attracted by the ability to avoid purchase of certified seed and the trouble of overwintering large amounts of seed potatoes; planting an expensive seed potato in a marginal dry-field where yield will be low doesn't seem like the brightest idea. 

I'd like to grow TPS in a garden plot to form micro-tubers, which could be tasted to eliminate bitter ones, before planting out on a dry field for production the next year.

If I only harvested TPS from clones in their second (or third) year after evaluating yield, would I avoid the problems discussed above?

6
Plant Breeding / Re: Adapting plants to new climates
« on: 2018-12-03, 08:46:34 AM »
I agree; their stuff is really interesting. I was just looking at it the other day; 60 day corn, high altitude squash, etc.

7
Well, don't send me anything rare. (Much as I'd like to try them!) But if you have lots of nap gene peas, I'd be happy to trade for some.

8
Plant Breeding / Re: Looking for collaborators on two projects
« on: 2018-12-03, 08:39:26 AM »
Thanks Carol and Joseph for the suggestions on wide crosses! It should be very interesting and I'll be reporting back on what happens.

Since the information on sterile results of wide crosses came from folks interested in establishing genetic relationships among species rather than in plant breeding, I suspected it was not as absolute as they made it sound.

And Andrew, I'd be delighted to get some black walnuts. In my area, a lot of walnuts have already declined and disappeared, including the only one I knew of near my house. I was going to use the website "Falling Fruit" to locate walnut trees around the metro (they list thousands) and see if they were still alive and bearing. Using google street views combined with the Falling Fruit site, however, suggested that many of them were dead or dying, and I didn't get around to it. It is on my list of things to do this year.

9
This is all hypothetical right now. I'm getting ready plans for lots of upcoming landraces; peas, lentils, grains, quinoa, pepo squash, cabbage, etc. And I'm sure I'd run across this eventually.

10
Well, I'm very interested. And I already have a lot of your material. But . . . I'm quite likely to fail! I'll do my best, though, to return some seed.

Are you particularly interested in purity of lines? I'm interested in trying to get as many crosses as possible without intervention by close planting and possibly introducing the mutant varieties discussed in other threads.

11
Plant Breeding / Re: Looking for collaborators on two projects
« on: 2018-12-01, 03:48:59 PM »
Andrew, do you have Thousand Cankers in your area? Around here, it has been taking out all the black walnuts. Or have any trees in your area survived it? I've been looking for such trees for their possibly superior genetics.

12
Plant Breeding / Fake Tetsukabuto?
« on: 2018-11-26, 10:10:39 AM »
I grew a few hills of Tetsukabuto squash in hopes of getting crosses with nearby moschatas and maximas. I harvested a half dozen fruit. They are dark green/ black, roundish, slightly ribbed, with the flared, five sided stems of a moschata.

Then I chopped one open. I'd heard that Tetsukabuto squash usually have a seed cavity densely packed with flesh/fiber, with only a few seeds.

On the contrary, this one was rather stringy/ empty, and had quite a few seeds. They looked like moschata seeds, though rather large.

Is this the real thing? Or is it just a moschata of some sort?

13
Plant Breeding / Re: High Outcrossing Peas (Pisum Sativum)
« on: 2018-11-26, 09:29:08 AM »
Andrew, the links you posted don't lead me anywhere; it gives me a complicated search function which when searched leads to an error message.

Also, I tried to go through the Pisum collection main page, but I couldn't figure out how one would find particular material and request it.

14
Plant Breeding / Looking for collaborators on two projects
« on: 2018-11-19, 06:51:27 PM »
I'm looking for collaborators on two projects.

I ordered some seeds from GRIN; to be specific, Cucurbita pedatifolia and C. x scabridifolia. I am investigating the possibility of producing perennial cucurbita crops for food, oil and fodder. I am currently growing C. foetidissima (buffalo gourd), which can be crossed with difficulty with C. ficifolia (Malabar gourd). However, the literature seems to indicate that subsequent generations are sterile. I can not find any references to the cross compatibility of C. ficifolia with either C. pedatifolia or Cucurbita ×scabridifolia.  C. foetidissima, however, crosses with C. pedatifolia to produce C. x scabridifolia. I hope, therefore, that C. ficifolia may be more compatable with one of these species, either before or after a cross with C. foetidissima, or that a cross with C. foetidissima would generate enough diversity for selection by itself.

Also, I can't find much information on what these plants are like, so observing them and their performance in my climate is part of the planned research.

This is my first interaction with GRIN, and I want it to be positive, including a return of information. In the past, I've ordered rare seeds, or been gifted them, and failed to make any progress; they've failed to sprout, got neglected, etc. If I have collaborators, it is more likely there would be conclusive results.

So if you are in a similar climate to mine within the USA, and want to work on this project, please let me know! I'd share some seeds, though I will only be getting ten of each.

The second project is breeding a walnut that tolerates the Front Range and resists Thousand Cankers. Black walnut did fairly well here until Thousand Cankers showed up. The other walnuts may grow, but usually fail to produce a crop. I've ordered seeds for Juglans hindsii, J. major, and J. mandshurica, and bareroot trees of J. nigra and J. regia. I hope to cross these varieties and plant out the resulting nuts. This may take quite an effort to keep the walnut twig beetles off and keep the tender species from freezing out in cold winters. I plan on establishing J. nigra in ground and coating it with something to deter twig beetles; maybe Neem, or kaolin, or something else? In a good cause, I'd be willing to coat frequently, and even use something more toxic if necessary. The tender species could be grown for a few years in pots under cover, and then cut for scion wood to be grafted onto the black walnut, allowing for earlier flowering. I may also try various tricks to get the trees to flower early.

If somebody in the Denver Metro Area would like to collaborate on this, please let me know!

15
Yes, I planted them mixed. The second largest may well be domestic. Neither tasted that great, not bad, but not good enough to eat the whole thing. I just ate a few scoops from each.

I'm almost certain the big one is partly citron, due to the patterns and pale flesh.

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