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AQUAPEDIA / SOURCE-LINKED RESEARCH

Youkihi Hikari — Toutenkou

朱赤ヒカリメダカ / 東天光

Historical Oba named morphology/house selectionEvidence by claimIndependent review ongoing

Youkihi Hikari — Toutenkou is a documented Hikari body form selected within the Youkihi (Vermilion / Yang Guifei) family.

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: Youkihi Hikari — Toutenkou; Japanese romaji: not verified; Japanese characters: 朱赤ヒカリメダカ / 東天光. 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 vermilion familyREPORTED INPUT / STAGE 2Hikari body-form selectionFOCAL STRAINAMERICAN / ENGLISH NAMEYoukihi Hikari — ToutenkouJAPANESE NAME (ROMAJI)Not verifiedJAPANESE LETTERS (日本語)朱赤ヒカリメダカ / 東天光
Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Not a confirmed genotype or parent-fish identification.

Hikari form selection from Youkihi foundation Source: Oba historic Youkihi Toutenkou Hikari

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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

This is an original breeder-catalogue named morphology selection, not a separate genetic founder. Vermilion-orange Youkihi body color in Hikari form.

Claim-by-claim evidence

Research findingEvidence classDirect references
Medaka no Yakata attributes Youkihi Hikari — Toutenkou to Yukio Oba (大場幸雄), Hiroshima.Original-breeder historical variety recordEARLY ↗
The archive explicitly describes its form as Hikari body form of Youkihi (Vermilion / Yang Guifei).Founder-to-form relation; NOT a documented individual parent matingEARLY ↗ MAP ↗
Vermilion-orange Youkihi body color in Hikari form.Archived ornamental appearance description; no standard DNA assayEARLY ↗
The source credits the Hikari variant to original Youkihi breeder Yukio Oba; the form itself does not redate the original 2004 Youkihi discovery. The record appears in the 2005 catalog group.Historical identity/year-scope limitationEARLY ↗

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

Known research gaps

  • Breeder parent fish IDs and the exact crosses introducing the chosen Hikari/Daruma body form are not available in the cited public source.
  • No independent allele, genotype, Mendelian fixation ratio or current breeder-authenticated retail stock claim is established.
  • Source-owned photos are not reused without explicit rights permission.

Related profiles and lineages

Original research sources

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