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Messages - Ilya11

Pages: [1] 2 3 ... 6
1
Citrus General Discussion / Re: Rootstocks ??
« on: September 19, 2017, 03:05:07 PM »
Millet,
It is quite different from Florida rootstock guide,  e.g. it contains new very promising  Alcaide-Forner citrandarins not available in USA

http://www.flrootstockselectionguide.org/

2
Citrus General Discussion / Re: Pigmented Mexican limes
« on: September 19, 2017, 12:11:26 PM »
No way, they risk a prison if they send you the stuff.

3
Citrus General Discussion / Re: Pigmented Mexican limes
« on: September 19, 2017, 07:20:56 AM »
If you want I can send you the full text article (need your email address by PM).
The scientific term of splicing is for something else, but the isolation of genes  from one plant and their insertion into the genome of other plants technically is quite straightforward.
The main obstacle is in  regulations, these operations by law should be done is special containment facilities and the final plants require special authorizations.

4
Citrus General Discussion / Re: Rootstocks ??
« on: September 19, 2017, 03:49:47 AM »
Here it is ( for those who can read Spanish)

5
Citrus General Discussion / Re: Pigmented Mexican limes
« on: September 16, 2017, 01:48:19 PM »
It is because Key lime has a very short juvenile period, an easy target.

6
Citrus General Discussion / Pigmented Mexican limes
« on: September 16, 2017, 10:22:27 AM »
Anthocyanin containing  pigmented Mexican limes were produced in Florida by transgenic insertion of genes from red grape (Vitis):

 

 and Moro orange:



http://journal.ashspublications.org/content/141/1/54.abstract   

7
Citrus General Discussion / Re: Limon Rosso
« on: September 05, 2017, 05:15:17 PM »
Swingle 4475 is a  quite common rootstock, macrophilla will probably work also, but I do not have first hand experience with it.

8
Citrus General Discussion / Re: Limon Rosso
« on: September 05, 2017, 12:40:48 PM »
Ilya what root stock would you recommend? Definitely will try that.
For me, the best is citrumelo 4475  or citrumelo 5*, the larger the better, in Japan they are using 3 year old seedlings of Shikuwasa.

9
Citrus General Discussion / Re: Limon Rosso
« on: September 05, 2017, 03:34:08 AM »
From my experience, grafting of unmature wood on the strong rootstock results in much more rapid growth and development. The flowers could appear in three-four years.
This approach is  being used in the Japanese breeding program. 

10
Ponderosa has nothing to do with lemons. Genetically it is 40% pomelo, 60% citron with maternal input from pomelo.

11
Citrus General Discussion / Re: Large spines on second growth
« on: August 29, 2017, 04:15:48 AM »
The quicker is growth, the larger are the spines.

12
Citrus General Discussion / Re: Large spines on second growth
« on: August 28, 2017, 11:39:50 AM »
It is normal, thet could be even longer.

13
Cold Hardy Citrus / Re: citrus varieties in order of cold-hardiness
« on: August 22, 2017, 01:41:35 PM »
I have never seen an experiment where several trees of each of these were compared with each other right around the critical cold temperature and where one type survived and one did not. Or I mean where one group clearly outperformed another group, with multiple trees from each group.

Instead of playing with unfounded pleonasmal rhetoric, you better improve your bot searching engine.
The field  experiment including Yuzu, ichang papeda and Changsha has been made many years ago.
http://horttech.ashspublications.org/content/13/3/540.full.pdf+html

14
Cold Hardy Citrus / Re: breeding cold hardy pomelo
« on: August 22, 2017, 01:17:08 PM »
Millet,
Valentine parentage  is more complex,
it is ‘Siamese Sweet’ pummelo x ( ‘Ruby’ blood orange x 'Dancy' mandarin) that can be compared to PummeloxClementine

15
You should read more attentively the articles you cited. The story about gynogenetic haploids induced by triploid pollen has nothing to do with real world pollination and fruiting. All was done in vitro.

You are stretching your conclusions and are very reiterative and unclear.

16
Disclaimer is right, it is wrong.
Triploids never give haploid plants ; theoretically  their gametes  are only  haploid, diploid and triploid.
I believe you were misunderstanding. Triploid pollen can induce the formation of haploid embryo from the female fruit parent; the single chromosome set would always come from the female parent in such a case.

It is not triploid gamete that is giving haploid mother alike plants, it can be easily replaced by irradiated diploid pollen.

17
So a quick summary, here is what I gathered from the information
(disclaimer: this could be completely wrong)

When Oroblanco pollinates a normal diploid, you get a haploid (at least the vast majority of the time)
When a normal diploid pollinates Oroblanco, you probably get diploid and triploid
Disclaimer is right, it is wrong.
Triploids never give haploid plants ; theoretically  their gametes  are only  haploid, diploid and triploid.
Pollination of Oroblanco with diploid clementine pollen is giving only diploid plants due to unfavorable completion of diploid gametes   with haploid ones.
(Citrus Genetics, Breeding and Biotechnology,edited by Iqrar Ahmad Khan, p.205)

18
Citrus General Discussion / Re: whole new subcategories of citrus
« on: August 12, 2017, 05:35:04 PM »
C.medica that you mentioned has nothing to do with papedas either in morphology or in the sequence of expressed cDNA tags that were determined for them.
Why  are you creating your own mythical universe? It looks  like a AI bot activity.

19
Citrus General Discussion / Re: whole new subcategories of citrus
« on: August 12, 2017, 08:21:52 AM »
Again, completely wrong and misleading statement.
Clementine, mandarin, pummelo, sweet-orange and sour-orange genomes  were extensively  sequenced, there is no room for the slightest traces of papeda ancestry.

20
Citrus General Discussion / Re: whole new subcategories of citrus
« on: August 11, 2017, 04:30:04 AM »
I still think micrantha is just a form of hystrix but didn't know it is a progenitor of modern limes. I also expected maxima to feature more prominently and medica to feature less.
I like the way you think, but I don't think that's true here. I seem to remember reading that kaffir lime was a hybrid of some other type of papeda (I can't remember what it is right now) from which it derived its cold-hardiness. (It was some weird one, not as cold-hardy as Ichang papeda, but maybe I'm not remembering any of this right)
I think kaffir limes are descended from a different papeda ancestor than common limes. Isn't kaffir lime about as cold-hardy as the more cold-hardy oranges? While common limes are the most sensitive out of all the different citrus groups to cold, slightly more sensitive than common lemons.

Edit: I think it may have been C. latipes, also known as Khasi papeda.

But yes, it's well known that limes are descended from C. micrantha. Another little uncommon fact, C. micrantha is incredibly high in furanocoumarin levels, over four times higher than bergamot! Probably not a good idea to put the essential oil on your skin.

So lemon's primary ancestor is citron, for lime it is C. micrantha, and for kaffir lime it is Khasi papeda (assuming I'm remembering right)

I do suspect citron, C, micrantha, khasi papeda (and Ichang papeda too) are closer related to each other than they are to C. reticula or C. maxima, but that's just judging by morphological appearances.
This text is full of factual errors and Turing criteria is not met. :o

21
Cold Hardy Citrus / Re: Citsuma Prague
« on: August 06, 2017, 06:12:32 PM »
All three embryonal layers in higher plants are pluripotent. They are able to generate callus and it  is giving  both stems and roots. In this case, roots are not necessary belong to original L3.
Moreover, while L1 is quite stable, L2 and L3 are constantly invading each other.  This explains uneven margin in decorative albino chimeras (L1=green, L2=albino, L3=green)
https://uwaterloo.ca/biology/sites/ca.biology/files/uploads/files/Lecture%207%20for%20students.pdf.

22
Cold Hardy Citrus / Re: Citsuma Prague
« on: August 06, 2017, 06:51:01 AM »
It is important to note that we do not have the original Citsuma , but  only grafted plants.
The rooted stem cuttings could produce roots either directly from cambium cells (L3) or from callus  that potentially could involve cells from any layer.

23
Cold Hardy Citrus / Re: Citsuma Prague
« on: August 05, 2017, 05:01:09 AM »
To test this hypothesis, one could root Prague, and make a root cutting to root. The plant should be all L3 and thus should be poncirus.
As i wrote above, in most of the cases in root cuttings L1 will be replaced by L3 cells that are very invasive, but it could be  also be formed by the cells from the former L2 that are present in the roots.
L2 : Seeds are from F2. As Prague seems to carry few seeds, it would lead to S2 = satsuma. Seedlings should be pure sastuma.
Also L2 + L3 gives leaf form, so if both L2 and L3 where poncirus, i guess leaves would be trifoliate.
Sylvain demonstrated that fruits and seedlings are pure satsuma
Leaves are formed by all three layers, with L1 forming a leaf margin, this explains the fact that Prague have a very particular foliage.

24
I don't know, I wonder if the Chinese Orange could be partly descended from C. indica, which can still be found growing in the wild in Northeastern India. I'm also thinking that Meyer lemon has a lot less C. maxima in its ancestry (if any) than Orange.

I'd be really interested in citrus hybrids that didn't have any mandarin in their ancestry, since virtually all citrus hybrids are descended from mandarin.
Both statements have no experimental justification and are misleading.

25
Cold Hardy Citrus / Re: Citrumelo 5*
« on: July 21, 2017, 09:57:14 AM »
If citrus seeds can be legally imported to US, I can send 5* to you in the autumn.

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