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Author Topic: Long term cold hardy citrus breeding project  (Read 7467 times)

Ilya11

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Re: Long term cold hardy citrus breeding project
« Reply #75 on: July 12, 2018, 04:37:15 PM »
Given good conditions it will bloom next spring, but fruit formation will depend on  formation of complete flowers with mature styles.
Best regards,
                       Ilya

SoCal2warm

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Re: Long term cold hardy citrus breeding project
« Reply #76 on: July 19, 2018, 07:52:16 PM »
Those made me think it was easy, but for all I know they resulted from thousands of attempts.

I think the main barrier, in many citrus types (and this tends to be particularly true for hybrids) is a high percentage of nucellar seeds, which means that the majority of the seeds grown will be genetic clones of their parents. Grapefruits tend to be somewhere around 70-90 percent nucellar, for example.
That means you have to grow all the seedlings and you may not know if any are actually hybrids until much later when they begin producing fruits. Although of course there are several strategies to be able to help identify seedlings that are different from their parents.

For example might be using trifoliate citrange pollen on a grapefruit as the female parent. If any of the seedlings have trifoliate leaves, you know they are citrange-grapefruit hybrids. Or possibly the reverse of that could be possible: If any seedlings from a citrumelo don't have trifoliate leaves than they are probably hybrids of the other pollination parent that has ordinary leaves.


Another topic with more information on which citrus types tend to be nucellar: "Thread for Citrus Breeders"
http://tropicalfruitforum.com/index.php?topic=24518.0

« Last Edit: July 19, 2018, 07:55:21 PM by SoCal2warm »

SoCal2warm

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Re: Long term cold hardy citrus breeding project
« Reply #77 on: August 04, 2018, 11:24:40 AM »
((C. ichangensis x Duncan grapefruit) x Satsuma mandarin) x Duncan Citrumelo)

(C. ichangensis x Satsuma) x (Satsuma x trifoliate)

(C. ichangensis x (Satsuma x trifoliate)) x ((Satsuma x trifoliate) x pomelo)

Duncan citrumelo x Bloomsweet

Just some ideas


« Last Edit: August 04, 2018, 03:40:07 PM by SoCal2warm »

Walt

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Re: Long term cold hardy citrus breeding project
« Reply #78 on: August 04, 2018, 02:34:24 PM »
Are these crosses that exist, or crosses you plan?

SoCal2warm

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Re: Long term cold hardy citrus breeding project
« Reply #79 on: August 04, 2018, 03:46:58 PM »
I do have some Page mandarin & Shasta Gold seedlings, so it would be interesting to eventually try to do something with that.
Two of the most delicious mandarin varieties, btw.

With the exception of Satsuma of course (but that's just individual personal preference talking).
Kishu produces 100% zygotic seeds and is also a very very good one. Believed to be one of the parents of Satsuma, although it doesn't have anywhere near the cold hardiness of Satsuma. Still, it would be a very easy one to cross. Satsuma produces about 90% nucellar seeds, on the other hand.
« Last Edit: August 04, 2018, 03:49:38 PM by SoCal2warm »

Millet

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Re: Long term cold hardy citrus breeding project
« Reply #80 on: August 04, 2018, 10:48:16 PM »
Kishu is indeed a good tasting cultivar.  I used to have a kishu tree, but I removed it to plant another cultivar.  The main problem with kishu is that they are a such a very small fruit.  I also have a Page fruit, great for juicing, but it is also a small fruit, but larger than Kishu.

SoCal2warm

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Re: Long term cold hardy citrus breeding project
« Reply #81 on: August 06, 2018, 01:06:49 AM »
The main problem with kishu is that they are a such a very small fruit.
Yes, but it's kind of a novelty. They make up for it by being seedless (if the blossoms were not pollinated) and effortless to peel. Little fruits would be frustrating if it took some effort to peel them, but with Kishu that is definitely not the case.

SoCal2warm

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Re: Long term cold hardy citrus breeding project
« Reply #82 on: August 06, 2018, 09:56:52 PM »
A couple grown from seed:



 

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