Jyllene Genetics · Northern California
Meet the breeder behind Jyllene Genetics
I’m Chuy. Fizzberry — the line this company is built on — is SinMint Sundae × Red Runtz: Sin City Seeds crossed into Exotic Genetix. I didn’t breed those two. I ran them, picked the plants I wanted out of them, and made something that didn’t exist before.
I germinate the beans, run the populations in my own tents, reverse and collect pollen by hand, tag the plants, keep the notes, and decide myself what carries forward. Every photograph on this page is from one of my own runs. Where I know the cross, the cross is printed under the photo. Where a project is still being evaluated, it says so.
What pulled me into genetics is that you can build a plant out of the parts you actually want. If a flavour you like sits in one line and a different one sits in another, you can put them together and see what comes out. That’s the whole thing for me — chasing a fruity flavour, or a gassier one, and finding out which plant in the batch actually got it.
The story
How Jyllene Genetics started
I grew up in Butte County and went to Chico State on what I’d call the Van Wilder education plan. I was there a while, and I got to watch the whole thing change from the front row — glass-on-glass coming in, Trainwreck everywhere, and strains like GSC just starting to show up.
I started smoking in the early 2000s, and eventually started trimming for growers. That’s the part that actually taught me something. When you trim you handle hundreds of plants and you try a lot of different flower, and you start noticing you have preferences you can’t go out and buy.
Mine was density. I wanted the perfectly dense bud — the one you can pack in a bong and have it burn slow and smooth without clogging. Not the biggest bud, not the one that photographs best. The one that burns right. And I could find plants that had the flavour, or plants that had the structure, but not one plant that had everything I wanted at once.
That’s what moved me from growing to breeding. If the plant I wanted didn’t exist, the only way to get it was to make it.
COVID is when it stopped being an idea. The downtime gave me room to run populations properly instead of growing one plant at a time, and I started making crosses out of the strains I already loved rather than just smoking them.
Along the way I partnered with Jyllene, who works in education, to build My Next Harvest — a program for teaching people to grow at home. Teaching it forced me to be precise about things I’d been doing by feel for years.
A line is done when it stops surprising me in bad ways. No hermaphrodites, strong stock, healthy leaves, a good yield and a good smoke — all in the same plant, and again on the next run. Until every one of those is true at once, it’s still a project, and I’ll say so on the page.
Lineage
Four generations, one family
Everything I’ve released runs back through Fizzberry. Here is the whole program, including the lines I didn’t breed — those are credited to the people who did.
The small line under each name says where that name came from: the breeder, if it is someone else’s line, or its own cross, if it is one of mine. I’d rather spell that out than let it look like all of this appeared out of nowhere. Fizzberry is the fruit side of the program; taking it into Gas Burzt was me going after the gas, and Gen 3 is where that split into three directions.
Documented runs, 2022–2024
My work
These are plants I grew. Where a caption names a cross or a decision, it’s because I have the record. Where it doesn’t, the caption describes what’s in the photograph and stops there.
Case study
Fizzberry, from parents to release
Fizzberry is the line I’ve taken furthest. Two finished lines from breeders I trust, run out here, picked over, and crossed into something that didn’t exist before.
- The cross
- SinMint Sundae × Red Runtz — Sin City Seeds into Exotic Genetix. Two lines I’d already run and liked, from breeders whose work I trust. The cross is mine; the parents aren’t, and I’m not going to pretend otherwise.
- What I was looking for
- The same thing I’ve been after since I was trimming: one plant that does everything instead of one thing. Flavour on the fruit side, buds dense enough to pack and burn slow without clogging, and structure that holds it all up. I’d found plants with one or two of those. I hadn’t found one with all of them.
- The population
- I popped 10. All 10 were good — that wasn’t the problem. I kept one.
- What I observed
- Fruit aroma, strong colour expression, and heavy resin — sticky enough to be awkward to handle. Tight node structure, buds that stacked properly up the stem rather than sitting as separate lumps, and the density I was after. Finished at week 8.
- Why this plant stood out
- Five things, and it had to win on all of them: the structure of its nodes, the way the buds stacked, the smoke, bud density, and heavy trichomes. Nine good plants went in the bin for one that did all five at once. Picking the best plant out of a bad batch is easy. Picking one out of ten you’d happily smoke is the actual job.
- What happened next
- Fizzberry became the parent for everything since. A reversed Fizzberry female was used to pollinate SinMint Sundae in January 2024, and Fizzberry pollen produced both Gasberry Burzt (× Gas Burzt) and Blue Surge (Blue Slushie × Fizzberry, seeded September 2024). Every line in the catalogue now runs back through Fizzberry.
Selection
What I look for
Making seeds is the easy part. Deciding which plant deserves to become seed is the work. These are the things I actually judge on.
Flavour
Flavour is what I breed for. Fruity or gassy, that’s the axis I work on, and it’s the reason a cross gets made in the first place.
Density — and how it burns
The bud has to pack into a bowl and burn slow and smooth without clogging. That’s been my test since I was trimming, and it’s the reason I started breeding at all. Airy flower and over-dense flower both fail it.
The smoke itself
Not the look of it, not the smell in the jar. How it actually smokes. A plant can pass everything else and still lose here.
Bud stacking
How the flowers stack up the stem. It’s the difference between a cola and a string of separate buds pretending to be one.
Node structure
Where the branches come off and how they’re spaced. It decides how the plant carries weight and how the light gets in, and it shows long before flower does.
Trichome coverage
Heavy, and across the bract and sugar leaf rather than just the tips. I look at it up close, not in a photo.
That’s the whole list. A plant has to win on all six, not average out across them.
Method
How I approach breeding
Nothing here is unusual. It’s written down because most seed sites don’t write it down.
Choosing the parents
I start from finished lines by breeders who’ve already done the hard stabilising work — Sin City, Exotic Genetix, Cipher, Raw — and I run them myself first. You can’t pick a parent off a description. You pick it after you’ve grown it out and smoked it.
Reversing a female for pollen
Rather than run a male, I reverse a selected female so she produces pollen. The pollen comes from a plant I’ve already grown out and judged on flower, aroma and resin — which you can’t do with a male. It also means the pollen carries traits I’ve actually smoked, not traits I’ve assumed.
Making the cross
Pollen is brushed off, stored in a vial, and applied by hand to tagged branches, so every cross is traceable. Nothing gets crossed that I can’t point at in a photograph afterwards.
Running the population
I pop around ten and run them out. Ten is small enough that every plant gets looked at properly and big enough that the differences between them actually show.
Comparing phenotypes
Plants are tagged from the seedling stage and photographed at the same angle, on the same days, under the same light, so differences between them are real. Every plant gets judged on the same six things, and they get judged against each other rather than against a memory.
What gets rejected
Almost everything, and usually not because it was bad. On the Fizzberry run all ten plants were good. One got kept. A plant that’s strong on four of my six and average on the other two doesn’t make it, because those two become the line’s weak spot in every pack that ships after it.
Before anything is released
A line goes on the shop when it clears all of this, not most of it:
- Tested for hermaphrodites, and honest about what shows up. Stressed on purpose and watched late in flower. If anything appears, it goes on the product page in plain words before anyone buys it.
- Strong stock. Stems that hold the weight of their own flower without staking.
- Healthy leaves. Through the whole run, not just the photogenic weeks.
- It yields. Enough that the run is worth the twelve weeks.
- It smokes right. Dense, slow, smooth, no clogging — the original test.
- The population agrees. Plants from the same pack come out close enough that a buyer gets what the page describes.
- The flavour survives the cure. What you pick in flower is still there in the jar.
- It repeats. A second run, in a different season, doing the same thing.
Blue Surge is where that mattered. Some plants showed hermaphrodite traits during testing. The rest of the line was strong enough that I released it anyway — and the listing says so, and points it at growers who know what to watch for. I would rather you read that here than find it in week six. See the Blue Surge listing →
Fizzberry took about two years from first germination to release, and that’s normal here. It isn’t slow for the sake of it — it’s what the work takes. You run the population and find the cut you want. Then you reverse that cut. Then you pollinate the other cut you like. Then the seed has to mature. And then you test it, which means growing the new seed out and starting the judging over from a seedling. Two years is one honest pass through that.
The room
Behind Jyllene Genetics
A tent, a hygrometer, plant tags, a brush, and a lot of hours.
Differences
Why Jyllene Genetics
Not claims about quality. Things that are either true here or they aren’t.
Every breeder I built on is named
Sin City Seeds, Exotic Genetix, Cipher Genetics, Raw Genetics. The lines I started from are theirs and the page says so. What’s mine is which plants I picked out of them and what I crossed them into.
One catalogue, one family
Every line I sell runs back through Fizzberry. Gasberry Burzt and Blue Surge are both Fizzberry crosses — this is a breeding program, not a list of unrelated packs.
You know who the breeder is
My name and face are on this page. If a line disappoints you, you know who to ask about it.
The photographs are my own plants
Every image on this site is from a run I did. None of it is stock photography or someone else’s flower.
Lineage is printed under the photo
Where I know the cross, the cross is on the page. Where I don’t, the page says so instead of guessing.
Roughly two years to a release
Select the cut, reverse it, pollinate the other cut, let the seed mature, then grow the new seed out and judge it from scratch. Nothing here ships off a single run.
Projects in progress are labelled as in progress
Work still under evaluation is listed as such rather than sold as finished.
Original breeding, not resold packs
Every pack in the shop is my own cross. Nothing here is someone else’s seed with my name on the label.
Live work
What I’m working on
Updated as runs finish. Anything not marked “Released” is not for sale yet.
Fizzberry
| Parents | Red Runtz (Exotic Genetix) × SinMint Sundae (Sin City Seeds) |
|---|---|
| How it was made | Red Runtz held as the mother, SinMint Sundae reversed for pollen |
| Selected for | 1 kept from 10 popped — fruit aroma, bud density, stacking, node structure, resin |
| Seed | Feminized · indica · 8 weeks flowering · 6 and 12 seed packs |
Gasberry Burzt
| Parents | Gas Burzt (Cipher Genetics) × Fizzberry |
|---|---|
| How it was made | Gas Burzt held as the mother, Fizzberry reversed for pollen |
| Selected for | Fizzberry’s fruit taken toward gas |
| Seed | Feminized · indica · 8 weeks flowering · 6 and 12 seed packs |
Blue Surge
| Parents | Blue Slushie (Raw Genetics) × Fizzberry |
|---|---|
| How it was made | Blue Slushie held as the mother, Fizzberry reversed for pollen |
| Selected for | Deep purple expression on the seeded mother |
| Seed | Feminized · indica · 8 weeks flowering · 6 and 12 seed packs |
Gaspacho
| Parents | Gaslight (E85 × RS-11) × Gasberry Burzt |
|---|---|
| How it was made | Gaslight held as the mother, Gasberry Burzt reversed for pollen |
| Selected for | Gas carried a generation further |
| Seed | Feminized · indica · 8 weeks flowering · 6 and 12 seed packs |
Cloud Ripper
| Parents | 10Gs (Jet Fuel Gelato × Gastro Pop) × Gasberry Burzt |
|---|---|
| How it was made | 10Gs held as the mother, Gasberry Burzt reversed for pollen |
| Selected for | Gastro Pop sweetness against the Gasberry Burzt line |
| Seed | Feminized · indica · 8 weeks flowering · 6 and 12 seed packs |
Eau De Gas
| Parents | Blue Bath (Blue 16 × Bubble Bath) × Gasberry Burzt |
|---|---|
| How it was made | Blue Bath held as the mother, Gasberry Burzt reversed for pollen |
| Selected for | The soap-and-flowers side of Bubble Bath over gas |
| Seed | Feminized · indica · 8 weeks flowering · 6 and 12 seed packs |
Strain of Hormuz
| Parents | Gaspacho × Dopamine (Cipher Genetics — Blueberry Banana × Grape Gas) |
|---|---|
| Status | Made, not released. It goes up when it has been run and I am happy with it — not before. |
Government Shutdown
| Parents | Cloud Ripper × Dopamine (Cipher Genetics — Blueberry Banana × Grape Gas) |
|---|---|
| Status | Made, not released. It goes up when it has been run and I am happy with it — not before. |
Breeder profile
Chuy — breeder, Jyllene Genetics
| Name | Chuy |
|---|---|
| Role | Breeder and founder, Jyllene Genetics |
| From | Butte County, Northern California |
| Lines bred | Fizzberry, Gasberry Burzt, Blue Surge, Gaspacho, Cloud Ripper, Eau De Gas — plus Strain of Hormuz and Government Shutdown, made but not released |
| Builds on | Sin City Seeds, Exotic Genetix, Cipher Genetics, Raw Genetics |
| Also | Co-founder, My Next Harvest — home-growing education |
I breed cannabis at home-tent scale in Northern California and publish what I find. I came up in Butte County around the Chico scene, trimmed for growers before I ever bred anything, and started making my own crosses because the plant I wanted — dense, flavourful, and smooth to smoke — didn’t exist in one plant. I start from finished lines by breeders I trust, name every one of them, run them out myself before they go into anything, reverse selected females for pollen rather than running males, tag and photograph my populations, and write down the decisions, including the ones that didn’t work out.
Everything in the catalogue runs back through Fizzberry, and Fizzberry runs back through two lines I didn’t make and have never claimed to. I’m not trying to release a lot of packs. I’m trying to get one plant that does everything I want at once, and then take it somewhere new.
Jyllene Genetics sells cannabis seeds as souvenir and collectible items only. Germination may be illegal in your jurisdiction and is the buyer’s responsibility. Nothing on this page is a claim about potency, yield or effect.
