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rosa praelucens

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rosa praelucens

Post by Guest on 4th October 2010, 15:46

does any one know where i could get a ( rosa praelucens)

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Re: rosa praelucens

Post by The Lazy Rosarian on 4th October 2010, 16:00

Warren, I have not welcomed you or spoken to before as was out of computer contact. Any chance of some info on aforementioned rose please and possibly your use of it.
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Re: rosa praelucens

Post by Guest on 4th October 2010, 16:36

which rose , or do you mean rosa praelucens

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Re: rosa praelucens

Post by The Lazy Rosarian on 5th October 2010, 07:12

Yes please Warren, rosa praelucens, if that is pk.
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Re: rosa praelucens

Post by Guest on 5th October 2010, 08:02

it is a rose they found in yunnan prov in china at an attitude of 3500 mt, it was tested and found to be a decaploid,

modern roses are mainly tetrapoid

AACC AC female AC male

species or old world roses close to species types can vary in the septet ratio
such as rosa alba L


AACCDE

ACDE female AC male


here is the problem ,rosa pomifera septet formula is CDEE

CDE female E male

if you crossed modern pollen with it , AC X CDE you would get a tetraploid ACDE
but go the other way, its pollen with a modern E X AC bingo a triploid ACE

so getting back to your question of why use R praelucens

1 its a decaploid , with a vast gene pool sitting inside it
2 depending if the septet formula is balanced evenly or split unevenly like (eg R alba) could give some variation in results

the big problem is where do you find it as it a very rare rose

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Re: rosa praelucens

Post by OzRose on 5th October 2010, 09:36

Ah ha. It all becomes clear now.
The AC/DC rose . Laughing
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Re: rosa praelucens

Post by Admin on 5th October 2010, 19:19

If it makes pentaploid gametes it might prove useful for putting with triploids that make 1n gametes to even out the ploidy or even some of the pentaploids like the those from the caninae section.

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Re: rosa praelucens

Post by Guest on 5th October 2010, 19:36

i tell you what, i can see this one doing some interesting crosses with moderns ,the hybrid vigour , from pentaploid gametes into a tetraploid would be explosive, and all those genes WOW

go on HMF and look at the flower a real stunner and around 6" iin diametre
i fell like i am now on a treasure hunt for this one , with 10 mths to find it

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Re: rosa praelucens

Post by Ozeboy on 5th October 2010, 20:08

Sorry Warren can't find it on all the lists I have, even Rustons don't list it.

Try looking on the Web at Rumsey's roses that are now at Parramatta Park.
Might have their species listed under Parramatta Council.

I don't like your chances of locating it in Oz.

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Re: rosa praelucens

Post by Guest on 5th October 2010, 20:17

i wonder if thomas for roses has it

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Re: rosa praelucens

Post by Admin on 5th October 2010, 22:05

Viru might be able to source seeds of it for us too.

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Re: rosa praelucens

Post by Ozeboy on 6th October 2010, 10:38

Please put me on the list to get some of these seeds.

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Re: rosa praelucens

Post by Guest on 6th October 2010, 17:21

now now oze I AM FIRST IN LINE, STEP ASIDE Tantrum lol!

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Re: rosa praelucens

Post by Ozeboy on 6th October 2010, 18:17

There's no doubt Warren you brought up the Rosa Praelucens request in the first place. Am also sure you will do more with it than me. I will still try to find it here just the same. I love a challenge.

I have a few questions for you pertaining to Tissue Culture, use of herbacides (Very dangerous) and original data on chromosome counts.

Please treat me gently for I am a Virgin rose breeder with limited knowledge of backyard genetics as applied to poultry.

Will continue this in the correct section.

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Re: rosa praelucens

Post by Admin on 11th October 2010, 00:46

Bit of extra information about this rose... the legal seed imports list for the genus Rosa can be seen here: [You must be registered and logged in to see this link.]

This rose is not on it. It is therefore not legal to import. A permit to import it needs to applied for. This was doable and not too expensive from memory. It will not, therefore, be available anywhere in Australia unfortunately. It has a lovely looking flower. There are no descendants shown. If there were we might be able to bring op seeds from one of them in as Rosa hybrida.

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Re: rosa praelucens

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