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=== Congenital traits === | === Congenital traits === | ||
Congenital, or genetic, traits can be inherited by a character's offspring. Although genetic traits must be visible to provide stat bonuses and other effects, a character may also carry recessive traits which are invisible, yet can be inherited by one's children.<ref>"[Genetic traits are] visible, though characters can also carry recessive traits... those are not visible, but can be inherited by their offspring!" [[forumpost:26089470|rageair's reply]] in CK3 Dev Diary #7 - Characters & Portraits thread</ref> | Congenital, or genetic, traits can be inherited by a character's offspring. Although genetic traits must be visible to provide stat bonuses and other effects, a character may also carry recessive traits which are invisible, yet can be inherited by one's children.<ref>"[Genetic traits are] visible, though characters can also carry recessive traits... those are not visible, but can be inherited by their offspring!" [[forumpost:26089470|rageair's reply]] in CK3 Dev Diary #7 - Characters & Portraits thread</ref> | ||
=== Active === | === Active === | ||
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| When parent has {{iconify|Saoshyant}}, {{iconify|Saoshyant Descendant}} is inherited instead. | | When parent has {{iconify|Saoshyant}}, {{iconify|Saoshyant Descendant}} is inherited instead.<ref>{{cite file|events\decisions_events\major_decisions_events.txt}}, <code>major_decisions.0101</code></ref> | ||
|- | |- | ||
| {{iconify|Paragon}} / {{iconify|Consecrated Blood}} | | {{iconify|Paragon}} / {{iconify|Consecrated Blood}} | ||
2020年10月18日 (日) 11:58的版本
Breeding is the production of offspring. In Crusader Kings III, this also includes intentional strategies that aim to increase the likelihood of passing down certain congenital traits. This often involves marrying characters with any of the desired traits, and purposely disinheriting heirs that did not inherit the desired trait(s).
Trait inheritance
Congenital traits
Congenital, or genetic, traits can be inherited by a character's offspring. Although genetic traits must be visible to provide stat bonuses and other effects, a character may also carry recessive traits which are invisible, yet can be inherited by one's children.[1]
Active
First the chances of acquiring the trait as an active trait is checked as a function of the parents:
- ACTIVE - ACTIVE: 80%
- ACTIVE - INACTIVE: 50%
- ACTIVE - NONE: 25%
- INACTIVE - INACTIVE: 10%
- INACTIVE - NONE: 2%[2]
Inactive
If that check fails the chances of inheriting inactively is calculated:
- ACTIVE - ACTIVE = 150%
- ACTIVE - INACTIVE = 100%
- ACTIVE - NONE = 75%
- INACTIVE - INACTIVE = 50%
- INACTIVE - NONE = 25%[2]
General logic for trait with tiers inheritance
- Start from highest trait
- Calculate active chance. Lower tiers ( including inactive ) count as inactive of the tier. Each level down beyond the first multiplies chance by a define
- If active, use it; DONE
- Otherwise, go down a tier, if inactive pretend 1 more parent has that tier active, otherwise 1 more parent has it inactive.GOTO 2
When trying to inherit a tiered genetic trait, and the other person has one of lower tier, we pretend that means they've got the higher tier one recessively, and reduce the chance of inheritance by 20% per tier further down than 1 the other parent's trait is.
When going down a tier, add 40%.[2]
List of congenital traits
The table below contains all genetic traits that use the inheritance mechanism as described above.[3][4] This list does not contain traits such as 
Sayyid, which can be inherited from a character's non-biological parent (in the case of secret bastards), or 
Inbred which uses a custom inheritance chance. The natural prevalence column denotes the likelihood of any character being born with the trait if it is not inherited from their parents. For every trait with natural prevalence, the same value can be assumed for random prevalence (i.e. for generated characters).[3] Note that some traits cannot be inherited at the same time since they are incompatible; such traits are indicated if they belong in the same group.
| Trait | Natural prevalence (%) | Group |
|---|---|---|
 Melancholic (genetic variant)
|
0.5 | - |
 Lunatic (genetic variant)
|
0.5 | - |
 Possessed (genetic variant)
|
0.5 | - |
 Homely
|
0.5 | Beauty |
 Ugly
|
0.25 | Beauty |
 Hideous
|
0.15 | Beauty |
 Comely
|
0.5 | Beauty |
 Pretty / Handsome
|
0.25 | Beauty |
 Beautiful
|
0.15 | Beauty |
 Slow
|
0.5 | Intelligence |
 Stupid
|
0.25 | Intelligence |
 Imbecile
|
0.05 | Intelligence |
 Quick
|
0.5 | Intelligence |
 Intelligent
|
0.25 | Intelligence |
 Genius
|
0.05 | Intelligence |
 Delicate
|
0.5 | Physique |
 Frail
|
0.25 | Physique |
 Feeble
|
0.15 | Physique |
 Hale
|
0.5 | Physique |
 Robust
|
0.25 | Physique |
 Amazonian / Herculean
|
0.15 | Physique |
 Fecund
|
Unknown | Fertility |
 Clubfooted
|
0.5 | - |
 Hunchbacked
|
0.5 | - |
 Lisping
|
0.5 | - |
 Stuttering
|
0.5 | - |
 Dwarf
|
0.5 | Stature |
 Giant
|
0.5 | Stature |
 Spindly
|
0.5 | Physique (incompatible with good traits) |
 Scaly
|
0.5 | - |
 Albino
|
0.5 | - |
 Wheezing
|
0.5 | - |
 Bleeder
|
0.5 | - |
 Barren / Sterile
|
0.5 | Fertility |
List of other inherited traits
The following list contains all other traits that use a separate inheritance mechanic. For entries without a chance to inherit value for both parents, assume the value for single parent.
| Trait | Chance to inherit (%) | Notes | |
|---|---|---|---|
| Single parent | Both parents | ||
 Great Pox
|
10 | - | |
 Lover's Pox
|
10 | - | |
 Pure-blooded
|
15 | 75 | |
| Inbred
|
15 | - | |
| Sayyid
|
100 | - | Only inherited from apparent father. |
 Saoshyant /  Saoshyant Descendant
|
100 | - | When parent has Saoshyant, Saoshyant Descendant is inherited instead.[5]
|
 Paragon /  Consecrated Blood
|
100 | - | When parent has Paragon, Consecrated Blood is inherited instead.
|
| The Savior / Divine Blood
|
100 | - | When parent has The Savior, Divine Blood is inherited instead.
|
Inbreeding
Inbreeding is the process of two characters who are at least 4th degree relatives having children together. Such children can be born with negative congenital traits even if neither parent has them. However, there is a small chance for the child to gain the 
Pure-Blooded trait instead. The chance to gain inbreeding traits is low in the first generation, but each successive generation has a higher chance. Related characters are also harder to use the Seduction Scheme on unless either the target character's Faith accepts it or if the seducer has the Subtle Desire perk.
See also
References
- ↑ "[Genetic traits are] visible, though characters can also carry recessive traits... those are not visible, but can be inherited by their offspring!" rageair's reply in CK3 Dev Diary #7 - Characters & Portraits thread
- ↑ 2.0 2.1 2.2
common\defines\00_defines.txt,NChildbirth - ↑ 3.0 3.1
common\traits\00_traits.txt - ↑ "[If genetic = yes, the trait's] inheritance will follow the following rules: The trait can be inactive. Children can inherit the trait from both active and inactive parent traits. [...] An active trait is inherited with 100% chance, an inactive trait with a 50% chance. If the trait is successfully inherited from both parents, it becomes active. [...] If it's inherited only from one parent, it's inactive." Developer comments in
common\traits\_traits.info - ↑
events\decisions_events\major_decisions_events.txt,major_decisions.0101