hybridizing john & mitchie moe master rosarians pacific northwest district american rose society...
TRANSCRIPT
Hybridizing
John & Mitchie MoeMaster Rosarians
Pacific Northwest DistrictAmerican Rose Society
February 15, 2012
‘Seattle Sunrise’[(‘Pristine’ x ‘Selfridges’) x ‘Finest Hour’]
Photo by Rich Baer
Acknowledgements
Photos by authors, except where credits are shown
Excellent sources
Rose Hybridizing for Beginners,
Rose Hybridizers Association
Rose Hybridizing “The Next Step”,
Rose Hybridizers Association
The Concept of Hybridizing
Definition – to produce or cause to produce hybrids; to crossbreed
So then – to hybridize, take the pollen from the stamens of one flower and apply it to the pistils of another
Genetics?
Photo by Jason Kottke
How it Really Works!
A cross of these two…….
‘Love & Peace’ ‘Blue Peter’Photo by Rich Baer Credit - Photo Files
Produced These Seedlings
‘Lynn’ ‘Judie’‘Barbara’
SeedlingSeedling
But, Before You Start
Stop and picture your ideal rose Now – what characteristics should it have? Some possibilities include;
A particular form – e.g., HT, Fl, Mini, etc. A specific color Fragrance Disease resistance
Choosing a Trait of Interest
The possibilities are endless because of DNA
Thus – focus on your interest before you begin!
Do your research, and then select your parents
A Good Place to Start
Are the parents healthy roses? Are the parents of those parents healthy? Are other combinations of its parents
healthy? You need a good reference book for
parentage – e.g., Modern Roses or Helpmefind.com
Then plan your crosses!
The Anatomy of a Rose
Roses are capable of self fertilization as
each has stamens
(male organs), and pistils (female organs)
Texas A & MRose Breeding & Genetics Program
Gather Your Supplies
Tweezers,camel hair
brush,pollen
containers(35mm film,
baby food jars, etc),
Q-tips, tags
Selecting the bloom
Stamens should be starting to
show, so anthers are mature
The more petals, the more it must
be open
Timing can be critical!
Emasculating the bloom
Removepetals to expose
the stamens
and pistils
Emasculated Bloom
Petals removed
Pistils surrounded
by the anthers
containing pollen
Anthers
Removing the anthers
Carefully remove anthers
with tweezers or fingers
Stamenswith
anthers removed
Stigma
Collecting Pollen
Let mature anthers drop to a sheet of
paper for drying to release pollen
Drying Pollen
Most pollen will be
released by the next day
The powder-like grains of pollen will be visible on the
paper
Storing Pollen
Store pollen in a covered
container away from sunlight at room temp for
1 – 2 weeks, or refrigerate up to
4 weeks
Freeze for long term
Applying Pollen
Apply generous amount of pollen by
clean fingertip,
Q-tip, pipe cleaner, or camel hair
brush
Label your Cross
Label should be weather-
proof
List seed parent first followed by the pollen
parent
Include date!
Hip Developing
If pollination was initially successful, the hip will
start to swell in a
few weeks
Hips Maturing
It takes 90 – 120 days so the seeds
that are inside are mature and ripe for
harvest
Hips can be any size!
One of my crosses‘Gemini’ x ‘Seattle Sunrise’
R. acicularis
Hip cut opened
Dried stigma
Connected to ovary
Seeds
Hip and seeds
Harvest the hip and cut
open to remove the hard, bony
seeds
Wash to remove all parts of the fleshy hip
Soaking seeds
Soak for 1-2 days in a
mild fungicide
solution to prevent
mold that can kill the embryo in storage
Stratifying the Seeds
Store in moist Perlite for 6 weeks
at room temp,
followed by 6 weeks in
fridge before planting
Sowing the Seeds
Use a 2 inch deep tray with
drain holes and plant ¼ - ½ in deep in sterile
potting soil (peat/Perlite
1:1) or Sunshine #4
Add no fertilizer!
Seedling sprouting
Once sprouted, give tray 16 hours
of light per day
Keep moist!
Mist weekly with mild
fungicide to prevent
damp-off
Seedling after a few weeks
In 5 – 6 weeks you should see some buds
The waiting seems forever!
Waiting for that first bloom
Watch growth for vigor, disease
resistance, etc.
Here area couple of
nice, healthy buds!
The first bloom!
More waiting,
but a nice one!
Now, wasn’t
the wait worth it?
The Next Step
Wait for next bloom – how many petals, how long to repeat, etc.
If a keeper, take some cuttings to see how it propagates
Plant some to check vigor, disease resistance, etc.
Evaluate – did it meet your goal?
Questions?
‘Hot To Trot’‘Klima’ x ‘Freisinger Morgenrote’
Photo by Corinne Brown
Thank you