Search found 29 matches

by matt lustig
Sun Jan 26, 2020 8:00 am
Forum: Rose Hybridizers Association Forum
Topic: Worms eating seeds
Replies: 8
Views: 132

Re: Worms eating seeds

my medium is predominantly peat. I use the peat as it ostensibly has enzymes that inhibit fungal growth, but wonder if the heat of sterilization wouldn't destroy those enzymes. Philip, that's interesting. I've never used peat with rose seeds--I've mostly used vermiculite to stratify rose seeds and ...
by matt lustig
Sun Jan 26, 2020 6:52 am
Forum: Rose Hybridizers Association Forum
Topic: Worms eating seeds
Replies: 8
Views: 132

Re: Worms eating seeds

They seem to be soil nematodes. Yes, I agree with Giessen. I used to raise nematodes to feed small fish fry, and also used to let my students look at nematodes under magnification as part of my science classes. The terrestrial nematodes in the aquarium hobby are frequently called "microworms", alth...
by matt lustig
Tue Jan 21, 2020 12:59 pm
Forum: Rose Hybridizers Association Forum
Topic: I'm confused: a diploid?
Replies: 10
Views: 196

Re: I'm confused: a diploid?

Why Wasagaming ended up as a diploid. Duane, I have wondered similarly about some roses. For instance, when researching Spin-hybrid roses, I had noticed that 'Harrison's Yellow' and 'Namdalsrosen' are listed as triploid, in spite of their purported parents all being tetraploid. I suppose one option...
by matt lustig
Thu Jan 16, 2020 5:21 am
Forum: Rose Hybridizers Association Forum
Topic: Is every rose seed completely unique?
Replies: 17
Views: 228

Re: Is every rose seed completely unique?

...puzzled about a book saying that the seedlings of species roses are identical to their parents... Truly identical is a high bar to reach, and almost unequivocally such a book is incorrect. I use what I believe is a common-sense definition of sexual reproduction in plants and animals, wherein sex...
by matt lustig
Fri Jan 10, 2020 9:11 pm
Forum: Rose Hybridizers Association Forum
Topic: Soil Mix for Seedlings
Replies: 2
Views: 115

Re: Soil Mix for Seedlings

If you go to the top of the forum webpage, you can search old threads on this topic with keywords "soil mix" or similar. There seem to be some good ideas posted. Otherwise, I have just 2 comments: 1. For hardwood plants generally (including but not limited to roses) I prefer to make my own mix with ...
by matt lustig
Wed Jan 08, 2020 8:07 pm
Forum: Rose Hybridizers Association Forum
Topic: Photoperiod and Temperature
Replies: 1
Views: 63

Re: Photoperiod and Temperature

That's an interesting concept Karl. See https://www.researchgate.net/publication/281600754_Early_flowering_in_chestnut_species_induced_under_high_dose_light_in_growth_chambers for an interesting similar example in chestnuts. In my experience chestnuts in the field may produce staminate flowers in ab...
by matt lustig
Tue Jan 07, 2020 6:22 pm
Forum: Rose Hybridizers Association Forum
Topic: non rose plant from Zlesak
Replies: 9
Views: 180

Re: non rose plant from Zlesak

If the reblooming trait came from Japanese spirea, that would be quite botanically interesting as an example of trait introgression via an intergeneric hybrid. On the other hand if it was a mutation purely in ninebark as sounds likely, that may make the plant even more appealing in the native plant ...
by matt lustig
Tue Jan 07, 2020 4:26 pm
Forum: Rose Hybridizers Association Forum
Topic: North American Rose ID?
Replies: 3
Views: 136

Re: North American Rose ID?

Thank you! I was unaware of the rose key that you linked--that's great. I'll also plan to post pictures this summer/fall.

Sincerely,
Matt
by matt lustig
Fri Jan 03, 2020 11:43 pm
Forum: Rose Hybridizers Association Forum
Topic: North American Rose ID?
Replies: 3
Views: 136

North American Rose ID?

Do we know of anyone, whether on this forum or in academia, who is able to reliably identify North American species roses either through close-up photographs or leaf/stem/flower samples? Among my various roses I have 2 wild species (or potentially naturally-occurring hybrids), one clone each collect...
by matt lustig
Mon Dec 02, 2019 7:03 pm
Forum: Rose Hybridizers Association Forum
Topic: Chip Budding Questions
Replies: 4
Views: 220

Chip Budding Questions

I have some background knowledge (and supplies) from years of grafting apples and chestnuts, and am hoping to transfer these into chip budding of roses, something that I've not previously tried. I have a couple questions that perhaps forum members can shed light on: 1. What is the appropriate window...
by matt lustig
Thu Jan 24, 2019 8:25 pm
Forum: Rose Hybridizers Association Forum
Topic: Some ploidy questions
Replies: 26
Views: 724

Some ploidy questions

A number of forum posts have had to do with ploidy in roses, something that I would like to understand better. I understand from both roses and other flowers that higher ploidy levels are thought to lead to larger and/or "stiffer" flowers. However I do not know how consistent this relationship/corre...
by matt lustig
Wed Jan 23, 2019 9:55 pm
Forum: Rose Hybridizers Association Forum
Topic: Variegated roses?
Replies: 35
Views: 1969

Re: Variegated roses?

For some years my impression had been that variegated foliage in plants was inherited through faulty chloroplasts in a non-Mendelian fashion, and generally maternally inherited (similar to how mitochondrial issues are inherited in humans). Such maternal inheritance is thought to account for variegat...
by matt lustig
Tue Jan 15, 2019 8:53 pm
Forum: Rose Hybridizers Association Forum
Topic: Do more richly colored seedlings have more richly colored blooms?
Replies: 16
Views: 999

Re: Do more richly colored seedlings have more richly colored blooms?

David, I do not know of any information regarding your question with rose color. However, you might be interested in some similar information from a different genus. Somewhat similar to roses, snapdragons come in shades along a purple-red-pink-white spectrum, and also variously in yellow, and flower...
by matt lustig
Sat Jan 05, 2019 7:31 pm
Forum: Rose Hybridizers Association Forum
Topic: Is it just me? (On rose rustling...)
Replies: 11
Views: 327

Re: Is it just me? (On rose rustling...)

My own experience is more with obtaining seeds, less frequently whole plants and/or cuttings. Also my experiences are not solely with roses, but with hardwood plants (roses, chestnuts, and various fruiting species) more broadly. Nevertheless for what it's worth, I certainly am not comfortable taking...
by matt lustig
Thu Oct 04, 2018 5:41 pm
Forum: Rose Hybridizers Association Forum
Topic: Harvested hips
Replies: 38
Views: 2353

Re: Harvested hips

RBaxter, could you clarify your storage method? It looks like a cotton ball, wet enough to hold high humidity? Whatever it is, if it works well it might be more efficient than my own stratification method. I've typically used vermiculite for a variety of seeds (both roses and otherwise), but medium ...
by matt lustig
Thu Aug 30, 2018 9:26 pm
Forum: Rose Hybridizers Association Forum
Topic: Making room...
Replies: 5
Views: 426

Re: Making room...

Kim, I would be interested in Smiling Jean, given what you shared of its disease resistance. I'd like to see if it will set hips here in southern PA. I'll contact you (PM) to see if this can work out. Thanks for the offer!

Matt
by matt lustig
Thu Aug 30, 2018 7:16 pm
Forum: Rose Hybridizers Association Forum
Topic: Regarding ancestry
Replies: 10
Views: 692

Regarding ancestry

This post is partly a result of a personal and professional interest in genetics (I'm a math teacher but formerly taught science, including genetics concepts). We understand that in general, when there are offspring of two parents with equivalent ploidy (i.e. the offspring of 2 diploid parents), th...
by matt lustig
Sun Jul 22, 2018 12:14 am
Forum: Rose Hybridizers Association Forum
Topic: Self-Incompatibility
Replies: 24
Views: 1545

Re: Self-Incompatibility

Thanks to all involved for the interesting thoughts regarding the differences in self-compatibility levels. It sounds like there is not certainty about the genetic mechanism(s) that would result in these different levels in Rosa specifically, but there are some interesting theories. I particularly l...
by matt lustig
Sun Jul 22, 2018 12:00 am
Forum: Rose Hybridizers Association Forum
Topic: Self-Incompatibility
Replies: 24
Views: 1545

Re: Self-Incompatibility

We're getting a bit far afield from the original topic of self-incompatibility :) , but I think we agree on the central points. I think we both agree, for instance, that the same possibilities exist whether a single hybrid individual selfs (assuming a high degree of heterozygosity in that individual...
by matt lustig
Sat Jul 21, 2018 10:35 pm
Forum: Rose Hybridizers Association Forum
Topic: Self-Incompatibility
Replies: 24
Views: 1545

Re: Self-Incompatibility

...if two different strains cross to make a hybrid, the progeny has four choices. Cross with a parent, cross with itself, cross with a different hybrid, or don't cross at all. ... If it crosses with only one parent, it merges with that parent over time. This is certainly correct regarding the possi...