Weird how they mention malagueta but omit a far more popular pepper in Brazil, dedo-de-moça:

It's a Capsicum baccatum variety, related to those ajís amarillos from the infographic. Between 10k and 15k SHU, so it's hot but by no means as scorching hot as malagueta; that makes it a bit more practical to add to dishes. (Plus dunno about others but I always saw malagueta as something way more regional, from Northeast. Specially Bahia; the text does mention it, but those folks down north use it for sauces.)

Incidentally I was able to cross-breed it with ye olde bell pepper (Capsicum annuum), might as well share the pic here:

That's F1, mind you. The bell pepper parent is yellow, so I know for sure she has genes for yellow peppers in it. It was barely spicy, way fleshier than the dedo-de-moça, but smaller than the bell pepper.

Now I'm cultivating the F2. My final goal is to make a heirloom variety out of it, then cross-breed it with either chocolate habanero or another cross-breed, for a full gradient of heats and colours:

• lime — no heat. Mostly as a bell pepper a bit more resistant to pests, and the climate fuckery of my city. Perhaps for paprika. Colour inherited from the bell pepper (yellow) + habanero ("brown" is basically red pigment forming while the chlorophyll is still there, theoretically I can separate the genes encoding it from the ones encoding the red pigment).
• yellow — really mild heat; the sort of pepper you can bite and chew, and you'll notice the heat, but it won't be offensive. Mostly for filling it with ground meat and cheese and whatever.
• red — heat roughly on the same level as the dedo-de-moça, perhaps a bit spicier? Mostly to use it as seasoning; it's fleshier and larger than the dedo-de-moça parent, I like it. Plus DDM has a nasty habit of dying in the winter.
• brown — ideally as hot as the habanero, except with a different shape. And meatier. For Science!

Ideally shape+size should be like in the F1. Perhaps a bit prettier if I can do it.

There's also a fourth type of pepper I'm raising, that I don't see in the graph. I don't even know it's name. It grows into a rather large plant (2m height if I don't prune it), and it seems to be hotter than DDM, so I'm eyeballing ~30k SHU. If possible I'll cross-breed with the habanero and then use this cross-breed in my project; mostly because the bloody tree endures quite some abuse from cold and heat, and produces a lot of fruit. Still, if I don't manage to do so before I get a heirloom out of that bell x DDM hybrid, I'm settling for just a trinary hybrid.