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AQUAPEDIA / SOURCE-LINKED RESEARCH

Yo30

楊30

Medaka strainEvidence by claimIndependent review ongoing

Terai's maintained Yo30 is a separately selected Youkihi/朱赤 house line rather than an independent new 2004 invention.

Picture gene & lineage tree

Visual pedigree of breeder-reported inputs, where available. Dashed arrows represent documentary claims or selection history, not DNA-tested genes.

Horizontal branching Medaka lineage. American name: Yo30; Japanese romaji: not verified; Japanese characters: 楊30. Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Documented source links and evidence qualifiers follow the diagram.AQUAPEDIA / MEDAKA LINEAGE ATLASSTRAIN PEDIGREEREPORTED LINEAGEDASHED BRANCHES • REPORTED INPUTS / SELECTION STAGESNot an individual-fish pedigree or DNA / dominance test.REPORTED INPUT / STAGE 1Youkihi original familyREPORTED INPUT / STAGE 2Terai selected Yo30 maintained lineFOCAL STRAINAMERICAN / ENGLISH NAMEYo30JAPANESE NAME (ROMAJI)Not verifiedJAPANESE LETTERS (日本語)楊30
Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Not a confirmed genotype or parent-fish identification.

A selected maintained Youkihi family, not a new original 2004 strain Source: Terai Yo30 specialist variety account

Browse the larger Medaka lineage atlas ↗

View this strain’s illustrated gene tree in Discord ↗

Lineage review · Batch 21: Historical source describes the breeding stock or selected form shown by dashed connections. This does not establish individual parentage, genotype, or dominance. Original specialist source ↗

Overview

Specialist history distinguishes the original creator, Yukio Oba, from Michinori Terai's ongoing selection of the Yo30 descendant line.

Claim-by-claim evidence

Research findingEvidence classDirect references
The specialist catalog attributes Yo30's maintained line to Michinori TeraiSpecialist breeder-line historyTE1 ↗
The catalog characterizes Yo30 as one maintained Youkihi lineLine-level identification, not separate speciesTE1 ↗ O3 ↗
The original Youkihi ancestor is dated to 2004 and attributed to Yukio ObaOriginal creator distinguished from selectorO1 ↗ O3 ↗
The catalog reports a fixation rate above 99%; no test-cross data were supplied to verify itCatalog claim only, not independently testedTE1 ↗

Evidence labels refer to documentary strength. They do not assert independently tested genetics.

Known research gaps

  • The calendar year of the Yo30 house line's own public release remains unknown.
  • Reported 99% fixation must not be marketed as laboratory-proven inheritance.
  • Fish-specific genetic testing, validated inheritance percentages, exact water optima and universal grade thresholds have not been established from these cited histories.
  • Breeder-authenticated, licensed photos and individual parent provenance remain a separate editorial requirement.

Related profiles and lineages

Original research sources

Every row above links directly to its cited reference; publication or creation years are not interchangeable.