Picture gene & lineage tree
Visual pedigree of breeder-reported inputs, where available. Dashed arrows represent documentary claims or selection history, not DNA-tested genes.
This strain's direct parent lines are not established by the reviewed sources. No breeding cross, genotype or inheritance pattern is implied. Source: Sources remain under review; ancestry connections will appear only with cited evidence.
Browse the larger Medaka lineage atlas ↗
View this strain’s illustrated gene tree in Discord ↗
Lineage review · Batch 19: The reviewed records do not establish a defensible breeding cross; picture ancestry remains disconnected. Original specialist source ↗
Overview
The historical list records a combined pop-eye and Big Eye form with enlarged eyes that project outward from the head. Distinct archive breeder credit and source-scoped provenance are documented below.
Claim-by-claim evidence
| Research finding | Evidence class | Direct references |
|---|---|---|
| The historic catalog credits Tsutomu Niitani / 仁井谷努 (Hiroshima; romanization provisional); Breeder-attributed eye-form selection. | Breeder attributed in original Japanese specialist catalogue | H78 ↗ |
| The archive credits Niitani and describes eyes larger than usual and projecting laterally or outward; it does not provide named founding crosses. | Reported historical breeder description; full parent log not provided | H78 ↗ |
| Large, outward-facing eyes and pop-eye head proportions; eye appearance is an ornamental body trait. | Observable ornamental traits only, not genetic diagnosis | H78 ↗ |
| Do not treat every large or bulging eye as the same heritable ornamental line or make health conclusions without examination. Date reference: Catalog year 2009. | Recorded naming and chronological limits; no DNA or current stock proof | H78 ↗ |
Evidence labels refer to documentary strength. They do not assert independently tested genetics.
Known research gaps
- Date-group placement is source-reported and not proof of verified first sale or all original breeder generations.
- Incomplete founder stock identities, absence of independently verified molecular genetics and uncertain current-shop stock authenticity.
- Original historical photograph copyrights not cleared; external source photographs are not redistributed.
Related profiles and lineages
Original research sources
Every row above links directly to its cited reference; publication or creation years are not interchangeable.
- H78: Medaka no Yakata — historical creator catalog, 2001–2011 — Historical original-farm descriptions, subgroup labels and breeder credits