Rosa palustris sport

A meeting place for rose breeders.
Jwindha
Posts: 89
Joined: Wed Apr 22, 2015 10:22 pm
Location: SC - Zone 8a
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Rosa palustris sport

Post: # 71330Post Jwindha
Thu Apr 23, 2020 12:37 am

This one blossom showed up late last season on Rosa palustris. 14 petals instead of 5, no receptacle, an unusually long stem, and a strange cleft in the stigma pad. Ragged form, but exciting potential!

-Jonathan
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DoublePalustris.jpg

roseseek
Posts: 5118
Joined: Sun Dec 11, 2011 6:54 pm
Location: Zone 9b Central California, Sunset Zone 15
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Re: Rosa palustris sport

Post: # 71332Post roseseek
Thu Apr 23, 2020 1:54 pm

Interesting! Good catch!
Kim
California Central Coast
USDA Zone 9b
Sunset Zone 15
Cooler inland coastal valley with strong marine influence

Jwindha
Posts: 89
Joined: Wed Apr 22, 2015 10:22 pm
Location: SC - Zone 8a
Contact:

Re: Rosa palustris sport

Post: # 71333Post Jwindha
Thu Apr 23, 2020 5:33 pm

roseseek wrote:
Thu Apr 23, 2020 1:54 pm
Interesting! Good catch!
Thanks Kim! It's my understanding that multiple petals is a dominant trait, so I saved what little pollen there was to use on palustris this season to hopefully generate a few "pure" palustris plants with doubled flowers.

"A dominant gene located on LG32 controls single versus double petals (with the double flower phenotype being a dominant qualitative trait)."
https://www.nature.com/articles/s41438-019-0156-0

"In roses, the double flower phenotype is associated with a dominant mutation in the yet unknown Df (DOUBLE FLOWER) locus."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6110776/

"A study of a rose hybrid population revealed that the double-flower phenotype is a dominant qualitative trait that is controlled by a single gene. However, the degree of double flowering, that is, the number of petals produced by secondary-effect genes, has not been fully characterized. In addition to genetic factors, environmental cues (e.g., temperature) also affect the number of petals. Low temperatures increase the number of petals and decrease the number of stamens, resulting in the bullhead rose phenotype."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5906699/

roseseek
Posts: 5118
Joined: Sun Dec 11, 2011 6:54 pm
Location: Zone 9b Central California, Sunset Zone 15
Contact:

Re: Rosa palustris sport

Post: # 71335Post roseseek
Thu Apr 23, 2020 5:50 pm

That is a very interesting idea! Good luck with it!
Kim
California Central Coast
USDA Zone 9b
Sunset Zone 15
Cooler inland coastal valley with strong marine influence

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