PecoraGenesis
PecoraGenesis is a Minecraft plugin that introduces a genetics system and livestock management mechanics.
Livestock such as Cows, Sheep, Pigs, and Rabbits are assigned genes, and breeding them creates genetic combinations and mutations, resulting in varied traits.
Wild animals are treated as having the base gene AA.
Through repeated breeding, genes evolve and affect:
- Meat drop amount
- Hunger restoration
- Twin breeding efficiency
- Status effects
Additionally, meat obtained from domesticated animals has special effects, which can be further enhanced by cooking it over a campfire.
Overview
Each livestock entity has its own genetic data, which is stored in a database file.
This allows persistent tracking of individual genes and traits.
The genetics system includes the following probability factors:
inherit_chance(inheritance rate)dominance_chance(dominance rate)
These mechanics create breeding results similar to real-world genetics.
Supported Animals
The following livestock are affected by the genetics system:
- Cow
- Sheep
- Pig
- Rabbit
Cooked Meat Effects
Eating cooked meat grants effects depending on the animal and gene level.
Status Effects
| Animal | Gene Level | Effect | Level | Duration |
|---|---|---|---|---|
| Cow | 1 | Strength | I | 10–20s |
| 2 | Strength | I | 40–50s | |
| 3 | Strength | II | 5–10s | |
| Pig | 1 | Haste | I | 30–40s |
| 2 | Haste | I | 60–70s | |
| 3 | Haste | II | 20–30s | |
| Rabbit | 1 | Jump Boost | I | 20–30s |
| 2 | Jump Boost + Slow Falling | I | 40–50s | |
| 3 | Jump Boost | II | 20–30s | |
| 3 | Slow Falling | I | 20–30s | |
| Sheep | 1 | Speed | I | 20–30s |
| 2 | Speed | I | 50–60s | |
| 3 | Speed | II | 10–20s |
Hunger & Saturation
| Animal | Food Level | Hunger | Saturation | Chance |
|---|---|---|---|---|
| Cow | 0 | 8 | 12.8 | None |
| 1 | 9 | +1 | 40% | |
| 2 | 10 | +2 | 30% | |
| Pig | 0 | 8 | 12.8 | None |
| 1 | 9 | +1 | 40% | |
| 2 | 10 | +2 | 30% | |
| Rabbit | 0 | 5 | 6 | None |
| 1 | 6 | +1 | 40% | |
| 2 | 7 | +2 | 30% | |
| Sheep | 0 | 6 | 9.6 | None |
| 1 | 7 | +1 | 40% | |
| 2 | 8 | +2 | 30% |
Note: 2 hunger points = 1 hunger bar icon.
Checking Genes
Right-click a livestock animal with a Stone Hoe to view its genes.
Breeding System
When breeding livestock, genes are determined with the following probabilities:
| Type | Chance |
|---|---|
| General inheritance (AG, etc.) | 75% |
| Mutation (AA, AG, GG, etc.) | 20% |
| Dominant mutation (TG, AC, etc.) | 5% |
Mutation order:
A → T → G → C → A ...
Gene Traits
Each gene combination provides different bonuses:
| Gene | Drop | Food | Breed | Status |
|---|---|---|---|---|
| AA | 0 | 0 | 0 | 0 |
| TA | 0 | 1 | 1 | 0 |
| AT | 0 | 1 | 2 | 0 |
| TT | 0 | 2 | 0 | 0 |
| GA | 0 | 0 | 1 | 0 |
| AG | 1 | 0 | 2 | 0 |
| GG | 3 | 0 | 0 | 0 |
| CA | 0 | 0 | 1 | 1 |
| GT | 2 | 1 | 0 | 0 |
| TG | 1 | 2 | 0 | 0 |
| AC | 0 | 0 | 2 | 1 |
| TC | 0 | 2 | 0 | 1 |
| CT | 0 | 1 | 0 | 2 |
| CG | 1 | 0 | 0 | 2 |
| CC | 0 | 0 | 0 | 3 |
| GC | 2 | 0 | 0 | 1 |
Trait Explanation
| Trait | Description |
|---|---|
| Drop | Meat drop amount |
| Food | Hunger & saturation restoration |
| Breed | Twin breeding chance |
| Status | Strength of status effects |
Additional Notes
-
Twin breeding chance:
- 0 = None
- 1 = 25%
- 2 = 50%
-
Meat drop multiplier:
- 0 = Vanilla
- 1 = 1.2×
- 2 = 1.5×
- 3 = 2.0×
-
Milk cooldown chance:
Determines the probability of a 5-minute cooldown when milking cows/goats.
Compatibility
- Paper
- Purpur
- Spigot
- Bukkit
Supported Minecraft Versions
- Minecraft 1.21.x
Requirements
- Java 21+
Installation
-
Download the plugin JAR from GitHub:
https://github.com/yamaimo11924/PecoraGenesis -
Place it into your
/plugins/folder -
Restart your server
Wiki
https://seesaawiki.jp/ymc/d/PecoraGenesis
Changelog
- Mar 14, 2026 – Initial release
- Mar 15, 2026 – Minor fixes (v1.1)
- Mar 16, 2026 – Improved update notifications (v1.2)
