Uma Musume Inheritance & Parenting Guide: Gene Strategies

Uma Musume Inheritance & Parenting Guide: Gene Strategies

Table of Contents

• Introduction
• Preface & Personal Notes
• Changelog
• Glossary & Terminology
• Chapter 1: Compatibility & Inheritance effects
• Chapter 2: Gene Types & Inheritance Mechanics
• Chapter 3: Red Gene mechanics
• Chapter 4: Gene generation mechanics & farming strategies
• Chapter 5: Recommended strategies
• Chapter 6: Red Gene deeper dive
• Chapter 7: 4th Anniversary white genes
• Chapter 8: Practical steps: what do I do now?
• Bonus Chapter: Inheritance chances
• Final Summary & Takeaways

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Introduction

The main aim for this guide is to provide an understanding about the inheritance breeding system and the strategies involved for creating optimal parent Umas for breeding. This guide is written with the assumption that you already know the basics about the game. If anything is foreign to you, you may not be ready for this guide.

Preface: Parent farming is not mandatory for the game, but it significantly enhances your runs. Think of it as an optional roguelike feature. You are the one to decide for yourself how far/deep you want to delve into the parenting mines.

Preface & Personal Notes

• Personal notes emphasize JP server terminology and an intent not to update frequently unless new information surfaces.
• Mentions Ko-fi page and recruitment posts, plus a shoutout to Rednu for video formatting.
• Includes social links and disclaimers about global vs JP terminology.

Changelog

• 4 June 2021 - Version 1 of Blue/Red/Green gene explanation
• 5 June 2021 - White gene theories / data and farming strategies
• 18 June 2021 - Red gene appearance rates and strategies
• 7 Jan 2022 - Tidying up the guide and adding in some new info
• 25 Jan 2022 - Discovered new Red gene mechanics and added to the guide
• 14 June 2022 - Updated green gene data, devs said it depends on skill level
• 20 June 2023 - Refreshed the guide to take into account 2023 compatibility changes & scenario refresh updates.
• 19 October 2023 - Reformatted the guide to be more readable and updated information.
• 5 Jan 2025 - Added some info about UAF / Farming scenario / Mecha scenario & included a new individual compatibility explanation
• 8 March 2025 - Cygames added new white genes on 4th Anniversary.
• 28 June 2025 - Added Design your island stuff, Re-added early compatibility stuff for global, tidied up a little bit around the guide & summary section
• 1-7 July 2025 updates - Linked Rednu’s video - Uses Global terms and condenses majority of the guide into a digestible format.
• 3 August 2025 - Added Gene proc rate in chapter 2
• 12 August 2025 - Added inheritance data and bonus chapter about proc rates
• 30 Oct 2025 - Updated Onsen Scenario
• 1-10 Nov - Updated Onsen scenario & auto stuff, added Calculating compatibility to chapter 2 for better visualisations.
• Wrote a lil bit about Aoharu for global crowd.

Glossary & Terminology

• JP terms: 逃げ/Nige 先行/Senkou 差し/Sashi 追込/Oikomi
• Unofficial Fan terms for JP: Runner, Leader, Betweener, Chaser
• Official Global terms: Front Runner, Pace Chaser, Late Surger, End Closer
• Other terminologies used: JP/REAL, Rentals, Compatibility, Affinity, Parents, Legacy, Grandparents, Sub legacies, Genes/Factors, Sparks, Mid run - Inheritance event, Inspiration event, Uma/Umnya (Uma Musume)

Chapter 1: Compatibility & Inheritance effects

Overview and key concepts:

• Overall Compatibility levels: ◎ Great (>150), 〇 Good, △ Poor
• The compatibility score is shown in-game, but raw base numbers are hidden; external tools can compute the exact value.
• Several external tools are cited for baseline compatibility planning (mee1080, Gametora, U-tools).
• 2025 Global Launch changes: compatibility works differently; only overlapping G1 races grant bonus compatibility points; G2/G3 and title bonuses no longer contribute.
• Base compatibility boosted; G1s grant +3 points each post-2.0 anniversary.

General strategy:

• Race the maximum number of G1s available; overlap turf G1s for respectable compatibility; ideal 22-26 with dirt rotation. If enough overlap, ◎ compatibility can come from one side of the lineage.
• The 2.0 anniversary overhaul revamped the system; old formulas are obsolete for JP.
• The concept of individual vs overall compatibility evolves; 2025 bonus chapter provides updated data.

Some background on compatibility mechanics and titles (list of major Classic, Triple Tiara, Spring/Autumn Triple Crowns, etc.)

Calculation notes:

• The inheritance calculation considers P1->gp1 and P2->gp2 with bonuses; numbers are visualized through a diagram (plus sign between parent lines).
• Gold inheritance is a flat indicator; not a guaranteed increase in genes; likely signals a 3★ proc.
• A prime example: If both sides have identical races overlapped, can yield high compatibility.

Chapter 2: What do each gene do and how does compatibility affect these? {#chapter-2-gene-types--inheritance-mechanics}

Blue Genes (Stat boosts):

• Two-stage process to roll blue gene (first a stat, then grade).
• 1-5 stars correspond to ranges; the base chance for 3★ blue is around a few percent depending on stat and rank, with tables showing exact rates at different stat ranges.
• End result: higher ☆ improves chance of procs and upper end of ranges; however, the exact rates can be complex and are updated in bonus chapters.

White Genes (Skills) & Green Genes (Unique Skills):

• White skills can be learned if the skill is learned during the run; gold versions improve the odds of passing the gene to offspring.
• Green genes (unique skills) can be inherited and generate a hint during mid-run; they require at least 3☆☆ to be reliably generated.
• The stat gains from green genes are sensitive to the star level of the gene; increases in certain stat caps are possible, though exact numbers are often unknown.

Red Genes (Aptitudes):

• Red genes are tied to aptitudes in specific areas (Ground, Distance, Strategy) and the strength of inheritance is affected by the gene’s grade (☆).
• It’s important to raise the relevant A-grade aptitude to generate the desired red gene; e.g., Toy examples for Mayano Top Gun and Symboli Rudolph illustrate how to avoid generating useless red genes.
• Hidden red gene values suggest that red genes can follow +1 to +5 value mechanics, making high rolls possible but often unpredictable. This is not fully empirically verified in all cases.

• The ideal parent strategy is to pair similar running styles and distances to maximize common genes in the lineage; this yields higher white pool generation and higher pass-down odds.

Chapter 4: Gene generation mechanics & farming strategies for the different grades of genes {#chapter-4-gene-generation-mechanics--farming-strategies}

Green genes (Unique skills):

• Generated if character is upgraded to at least 3☆☆, and stat boosts can be significant depending on the scenario.

Red Genes: Strategy, Ground, Distance

• Red gene selection depends on aptitudes with A-grade or higher; raising a specific aptitude to A increases the chance of generating the corresponding red gene.

Generating Blue Genes:

• At run end, a stat is selected among five; then a second roll based on grade determines the blue gene★; 3★ requires at least B rank or above (over 600 stats).
• A table lists blue gene appearance rates by stat level.

Methods of farming for 3★ blue stats:

• By combining theory and run results, you can achieve an approximate 3% chance of obtaining a 3★ blue stat per run under certain stat distributions.

White Gene farming & occasions:

• 20-30% base chance to inherit white race genes, 5% base chance for a 3★ white skill; increases with higher grades and end statistics.

Chapter 5: Recommended supergene mummy strategy {#chapter-5-recommended-strategies}

• Combines compatibility and gene generation theories to maximize chance of high-quality genes.
• Examples of strong parent lines and a philosophy: jack-of-all-trades vs URA essence specialist.
• Planning includes running the same races as your parents to maximize shared genes and common G1 genes; ensure you win G1 races to enable gene appearance.

Chapter 6: Red Gene deeper dive {#chapter-6-red-gene-deeper-dive}

• Source references from Umamusustation data show red gene probabilities; aptitudes must be A or higher to generate red genes; probability spread among A-ranked aptitudes.
• S-rank does not increase probability of a specific red gene; 3★ red gene appearance 10%, 2★ 70%, 1★ 20% in some data sets.
• Strategy discusses minimizing red gene RNG by training Umas with fewer native A stats; example: Urara with 3 native A aptitudes.

Chapter 7: 4th Anniversary new white genes {#chapter-7-4th-anniversary-white-genes}

• 4th Anniversary added new genes, filterable in-game.
• White genes (aptitude genes) appear at a rate depending on the Red gene stars and lineage metrics; 6 stars gives 100% chance for the aptitude gene to appear.
• Data tables and graphs illustrate how ending runs above UE (End Grade) affects white gene quality; UE is the current ceiling for boosted gene quality.

Chapter 8: I’ve read all this, what do i do now? {#chapter-8-practical-steps-what-do-i-do-now}

Strategic Gene Farming Decisions

• Before a training run, plan your setup: what is the parent used for (CM/LOH, GGP, GP, main parent)?
• Plan routes to generate desired Red Genes by targeting aptitudes; ensure you can lock a gene with a parenting pass if you want to guarantee a gene.
• Determine rental assets to raise aptitudes you need for the run (dirt, mile, mid).
• Decide whether to become a jack-of-all-trades or a specialist with URA essence.

4-step approach to practical farming:

1) Strategic Gene Prioritisation: focus on Red Genes first; distance aptitudes should be pushed to S; S distance is critical for events.

2) Plan your support deck to push stats to the highest grades; address the Blue Genes chicken-and-egg problem by using strong blue genes.

3) White Genes (Skills): plan supports to obtain needed skills; rentals can help obtain rare whites.

4) Compatibility: ensure the parent route has strong alignment in compatibility with the target Umas; bridging with dirt races may help compatibility.

Bonus Chapter: Inheritance chances! {#bonus-chapter-inheritance-chances}

• 12 August 2025 update introduces Polaris’ data and notes that inheritance rates align with the patent’s compatibility formula.
• Inheritance formula: base_inheritance_odds_per_type * (1 + individual_compatibility_score/100) = inheritance_odds_per_type.
• Base rates: Blue Stats 70%/80%/90% per star; Red Genes & White aptitude 1%/3%/5%; Green 5%/10%/15%; Race 1%/2%/3%; Whites (Skills, Scenario, Hidden whites) 3%/6%/9%.
• The chapter also discusses the impact of Golden inheritance events and the variability of gold inheritance signals.

Final Summary & Takeaways

• Parenting is optional; you can content yourself with minimally viable parents. Focus on Red Genes first, plus at least two blue genes, and strong whites.
• Borrowing is recommended; use strong borrowable parents to maximize gene outcomes.
• For global players, aim for an 9★ blue with Distance 2★ or more as a baseline; later scenarios improve odds.
• The dynamic of compatibility and gene generation remains a central focus; plan your runs to maximize overlap and pass-down potential.

Thank you for reading this long guide! If you’d like to support or ask questions, you can check out the Ko-fi page and share insights or corrections.