Tetraplid persicas ...

I’ll cite a few lines:

"In conclusion, the present investigation resulted in

new tetraploid and hexaploid plants from R. persica

and R. hybrida cv Iceberg. R. persica is one of the

wild native species of Iran, with a distinctive red eye,

and R. hybrida cv Iceberg is a fragrant rose well

adapted to the Iranian climates, growing most of the

year with few disease problems, which makes them

and their chromosome doubled plants to be good candidates

to add to the breeding pool of roses in Iran."

Link: www.rosehybridizers.org/forum/message.php?topid=15818&rc=1&ui=1808397568

Arno,

I think that the authors would have to answer your quesion, but perhaps it was to use these new tetraploids in crosses with modern roses. That wasy they could bepass the triploid intermediate stage that except for ‘Tigris’ have all apparently been infertile, and start working on repeat blooming right away.

Another advantage would be to gain more of the persica genes since already many of them are missing from ‘Tigris’ the only real link that we have to work with.

BTW, I am still making crosses back to ‘Tigris’ to recover more of that gene pool. I think that the more “lines” coming direct from ‘Tigris’ the better. These can then be crossed with one another further on down the line. Today I made a few crosses with my K201 (repeat blooming, probably tetraploid hulthemia hybrid) pollen onto ‘Tigris’.

Jim Sproul

Hi Jim!

Good Luck to that crossings, here still temperatures below 0

Greetings Peter Harris: The links you sent me about rose relations were right on target. I especially enjoyed the comments on Rubus – many thanks. Bob Williams