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Messages - ImGrimmer

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an interesting link to an article about hybridisation between domestic and wild watermelons

and the original paper in nature

Plant Breeding / Re: Strawberry Species / Hybrids
« on: 2021-06-10, 12:52:58 AM »
yes the underlying technique is always the same, I was rather wondering how to do it with these small obscure flowers.... Strawberries are not as simple in structure as other flowers e.g. citrus flowers. with their large obvious stigmas. I suspect there will be a lot of uncontrolled pollination in strawberries, especially self-pollination because it is so difficult to remove all the anthers.
It must be manageable, but I wonder what is the easiest way to manage it?

Plant Breeding / Re: Strawberry Species / Hybrids
« on: 2021-06-09, 04:19:42 AM »
Do you know what technique is used to do controlled pollination in strawberries?
I would like to make controlled crosses between different types, (European wild strawberry and cultivated types) but wonder how to prevent self-pollination and do controlled pollination.
So far I have helped myself by planting different varieties in a jumble and watching out for unusual offspring. But it's like a lottery....


The best I can do is to give you all a minor warning to do taste tests and possibly do brutal culling of future seeds from any that have any hint of bitterness.

all the fruits were bitterless, but also not sweet more like cucumbers. I liked them a lot

The slugs attacked principaly the merysthems and they section the rods with small diameter.
I selected my plants for a tall diameter of rod.
They are more long to attacked the merysthem when the cotyledons are tall.
A lot of roots can help the plant to restarted after an attack.
If the rod is section but the merysthem is not eaten i try a cutting and the result is often well!

There was no problem with the plants themselves, but with the fruits. The slugs really pounced on them. There was no way to prevent it.

I really would like to grow it, but in the german genebank there are no accessions of this type...

I have some Citron x Watermelon seeds from last year but I am not sure if they are viable. Slugs ate most of the fruits last year. So I harvested only some really late fruits not sure if they were already ripe. Beside slugs it was a good growing season. Direct seeded,  early fruit set and several fruits with less care.
But slugs are a real problem I couldn`t find a cure. Poison, traps even painting the fruits with chili powder helped only for a short time. If I have plants this year I`ll try copper pipes as a barrier, as it seems this helps. fingers crossed!

It is just an idea, but I could imagine that the sudanese population of watermelon is already a predomesticated type. Some kind of selection of the best wild types kept in a semi wild stage like it has happened in other plants already in the stone age.
There are pictures of these watermelons in egyptian tombs proving that these watermelons are in use since a long time (even it isn`t as old as stone age).
Could be could not, it is just an idea. But Pattern like this are known from other domesticated plants like grains and animals, e.g. due to recent genetic research and comparison with domesticated stone age horses, wild horses (Przewalski horse) are only feral horses at a very primitive stage.

As hint I see that in the collected accessions there is a wide variance in sweetness and other characteristics, relatively frequent and therefore unusual in a wild species, also that all other wild species are rather inedible in the sense of fruit flesh quality.

Very importantly, all this is just theory, just an idea that came to me while reading the various (written) sources and I have no experience out of first hand. And in the end it is irrelevant for practical work.
I think these types are very interesting for crossbreeding in domesticated watermelons, which could solve some weaknesses that exist in watermelons.


Two C. lanatus accessions collected in Sudan (PI 481871 and PI 254622) were placed in the deepest branch of the C. lanatus clade (Fig. 1b), supporting the idea that the primitive watermelons from Sudan and neighboring countries of northeastern Africa may be the closest to the progenitor of the sweet watermelon

We English speaking people throw acronyms around like crazy.
Germans are even worse. When you go to university, the first rule is to use words that nobody outside the university uses. German science is not about producing texts that are easy for the reader to understand, but about using certain scientific words that nobody understands straight away. Even students sometimes don't understand.
I learned genetics with an American book, despite the language it was easier to follow than German books. You need a dictionary for all new scientific words.  Apart from that, the point is to formulate as abstractly as possible. Believe me, English speakers are still far from that.

Tomatoes / Re: Is it too late for habrochaites?
« on: 2021-05-09, 08:30:30 AM »
Thank you William, I will test it.

Tomatoes / Re: Is it too late for habrochaites?
« on: 2021-05-07, 01:19:50 AM »
Do you use bleach for faster germination? How do you treat the seeds ? Might be worth a try. I was considering to use GA3 and Benzladenine, which I use as help for Passiflora germination. But I don`t like it and and alternative is preciated.

Tomatoes / Re: Is it too late for habrochaites?
« on: 2021-05-05, 12:02:39 AM »
Thanks for your help!
I ordered several accessions from the German gene bank. so I guess they can be pretty much anything.
it would be a shame to lose everything because there is not enough time. on the other hand, next year is a long time away....

Tomatoes / Is it too late for habrochaites?
« on: 2021-05-04, 11:40:36 AM »
Is it already too late to sow habrochaites, peruvianum and chmielewskii ?

Nice project! I selected some winter hardy Broccoli, Romanesco and Cauliflower over the last years which I plan to cross this season.
Beside that I have a bunch of Brussels sprouts x Kale hybrids which are more close to Brussel sprout than to Kale as a 2nd project. I would like to cross Kohlrabi but it is not sure if it survived the frost, it is more frost tender than other cabages.
Would love to see how Kohlrabi crosses segregate.

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