Author Topic: Hybrid of tomato more diversity  (Read 78 times)

Adrian

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Hybrid of tomato more diversity
« on: 2021-07-21, 02:50:40 PM »
Hello,
It look more and more important to hybrided the tomatos: this year is the pur exemple.All my tomatos have caught the blight this year and i have see most dangerous i have note that a few tomatos under a shelter have a few leafs with the blight.(this shelter is may old not totaly waterthight.)
The blight is not the alone problem for example: resistivity at the mosa´c, shadow, cold, hot, drought, rain
I don't demand a tomato totaly resistiant i have understand it impossible, the most resistant tomatos today could be the less resistant tomorow i want just more diversity on my patch.
For realised this experience, i will take a few cutings of tomatos or sow a few tomatos (if the plants are too sick)  that i will isolated in pot.If it possible i will put this pot at a placement without wind for avoid the autofecondation.If a fruit get fat i will know easily if my fecondation is good.
« Last Edit: 2021-07-21, 03:03:41 PM by Adrian »

Ocimum

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Re: Hybrid of tomato more diversity
« Reply #1 on: 2021-07-21, 03:12:25 PM »
Hello Adrian,

I am not sure if I understand you well: do you want to let cross pollination happen without you helping, just by stopping wind? That would not work, as a bumble bee would also vibrate the flower and induce self pollination.
Cross pollinating tomatoes is quite easy to do by hand, there are many videos to show the process https://www.youtube.com/results?search_query=crossing+tomatoes

And I am sure quite a few people here share seeds of F2 or F3 as well, to help kickstart your selections. The outcrossing tomato project is one which is the most promising to avoid the hand pollination, as it takes time and requires to be around at the right time.

William S.

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Re: Hybrid of tomato more diversity
« Reply #2 on: 2021-07-21, 08:14:26 PM »
You might be able to get EFN to send you seeds of something like Exserted Orange or Big Hill with a somewhat higher outcrossing rate. Or the promiscuous project. Or just look for exserted stigmas I find I can get a Sungold or Sunsugar with good exsertion regularly at the local hardware store when they sell plant starts in the spring.
« Last Edit: 2021-07-21, 10:48:39 PM by William S. »
Western Montana garden, glacial lake Missoula sediment lacustrian parent material and shallow 7" silty clay loam mollisoil topsoil sometimes with added sand in places. Zone 6A with 100 to 130 frost free days

Adrian

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Re: Hybrid of tomato more diversity
« Reply #3 on: Yesterday at 12:44:10 AM »
For this moment i grow andean horned, san marzano 2 and canestrino di lucca and yellow pear.
I don't think they are very resistantvthey have may the PH1 gene.But i think a few with exsert stigmats.
« Last Edit: Yesterday at 12:50:06 AM by Adrian »

Adrian

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Re: Hybrid of tomato more diversity
« Reply #4 on: Yesterday at 02:32:54 AM »
This flower is exserted?
Its the variety canestrino di lucca.
« Last Edit: Yesterday at 03:03:27 AM by Adrian »

William S.

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Re: Hybrid of tomato more diversity
« Reply #5 on: Yesterday at 05:40:27 AM »
Yes exserted but very modestly so. This type of exsertion might get a rare hybrid. Emasculation of the anthers before pollen release and then pollen transfer would still be needed for better success.
Western Montana garden, glacial lake Missoula sediment lacustrian parent material and shallow 7" silty clay loam mollisoil topsoil sometimes with added sand in places. Zone 6A with 100 to 130 frost free days

Adrian

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Re: Hybrid of tomato more diversity
« Reply #6 on: Yesterday at 08:45:45 AM »
Thank you william.I will try to put the male pollen of horned andean!

Adrian

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Re: Hybrid of tomato more diversity
« Reply #7 on: Yesterday at 10:36:24 AM »
It important the model of paintbrush for take the male pollen?

Adrian

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Re: Hybrid of tomato more diversity
« Reply #8 on: Yesterday at 01:27:36 PM »
It normal i have not the impression to see the male pollen on the paintbrush after this stage?

Steph S

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Re: Hybrid of tomato more diversity
« Reply #9 on: Yesterday at 02:29:47 PM »
I've never used that paintbrush technique, Adrian.  It's fairly easy to collect pollen simply by tapping an open flower onto a smooth, fairly flat surface (for example, the lens from an old pair of sunglasses is suggested).   The pollen is then applied to the stigma by gently dragging it across the pollen coated surface.
If you want your seed to be dependably hybrid, take off the anther cone of your mother flower.  Otherwise by the time it is fully opened and exserted it may be already self pollinating. 

Adrian

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Re: Hybrid of tomato more diversity
« Reply #10 on: Today at 02:45:01 AM »
I have tryed this morning
I have put the male anther on the stylet as the video!
I have not sucessed to remove the female anther but i have open this.
Unfortunately the plant or i have did the cross has caught the blight.
I am very choqued to see the tomatos caught the blight under a shelter!It never arrived so early.
« Last Edit: Today at 03:48:04 AM by Adrian »

Adrian

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Re: Hybrid of tomato more diversity
« Reply #11 on: Today at 06:55:21 AM »
First polinisation:andean x canestrino
Second polinisation: canestrino x san marzano 2
It look not so difficult finaly.
I don't know if thr fruits will get fat but it funny!
I have sucessed to remove the anther!
« Last Edit: Today at 07:04:17 AM by Adrian »

Adrian

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Re: Hybrid of tomato more diversity
« Reply #12 on: Today at 08:58:41 AM »
 the exsert stylet is a dominant gene?

William S.

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Re: Hybrid of tomato more diversity
« Reply #13 on: Today at 10:52:45 AM »
The exserted stigma seems recessive or codominant to me. Also it is probably at least two different genes or alleles.

We see roughly four easily observable conditions.

1. Deeply inserted

2. Near the tip of the anther cone

3. Modestly exserted

4. Extremely exserted

I think plants with extreme exsertion sometimes cross with insertion and produce modest exsertion = codominance.

Sometimes modest exsertion is relatively stable and must be a different allele or gene than extreme exsertion.

Sometimes exsertion seems environmentally enfluenced hotter = greater exsertion. This might be only some alleles.

Blight resistant varieties might be useful for crossing.
Western Montana garden, glacial lake Missoula sediment lacustrian parent material and shallow 7" silty clay loam mollisoil topsoil sometimes with added sand in places. Zone 6A with 100 to 130 frost free days