Merge duplicate terms: Badger Face vs Badger Faced Welsh Mountain sheep

[allenbaron]

Issue Summary

VBO contains two terms for the same sheep breed that differ only in spelling:

• VBO:0001309 - Badger Face Welsh Mountain (Sheep)
• VBO:0001310 - Badger Faced Welsh Mountain (Sheep)

These should be merged as they represent the same breed.

Evidence that these are the same breed

Scientific Literature (PubMed)

• PMID:26091804 (Kijas et al., 2015, BMC Genetics) uses "Badger Faced" consistently for the breed in whole-genome genotyping studies
• No scientific literature distinguishes between "Face" vs "Faced" as different breeds
• Both spellings are used interchangeably in scientific publications

Official Breed Registry

• Badger Face Welsh Mountain Sheep Society (official breed society) uses "Badger Face" (not "Faced")
• Website: https://www.badgerfacesheep.co.uk/
• Welsh name: Defaid Idloes
• Only ONE breed society exists for this breed

FAO DAD-IS

• Both VBO terms cite FAO DAD-IS as their source
• FAO uses both spellings interchangeably
• Lists synonyms: Defaid Idloes, Welsh Badger-Faced, Torddu, Torwen

VBO Term Analysis

VBO:0001309 (Badger Face)

• Source: FAO DAD-IS, LBO:0000661
• Synonym: "Welsh Mountain Badger Faced"
• Has UK geographic variant: VBO:0014330

VBO:0001310 (Badger Faced)

• Source: FAO DAD-IS
• MORE comprehensive synonyms including:
  • Defaid Idloes
  • Torddu Badger Faced Welsh
  • Torwen Badger Faced Welsh
  • Welsh Badger-Faced
• Has origin description: "local indigenous breed of Wales"
• Has UK geographic variant: VBO:0014331

Recommendation

Merge these terms using one of these approaches:

Option 1: Retain VBO:0001310, obsolete VBO:0001309

• VBO:0001310 has more complete synonym set
• VBO:0001310 has origin description
• Mark VBO:0001309 as obsolete with replaced_by: VBO:0001310
• Migrate LBO:0000661 xref to VBO:0001310
• Add "Badger Face Welsh Mountain" as synonym to VBO:0001310

Option 2: Retain VBO:0001309, obsolete VBO:0001310

• VBO:0001309 has LBO xref already
• Add all synonyms from VBO:0001310 to VBO:0001309
• Mark VBO:0001310 as obsolete with replaced_by: VBO:0001309

Geographic variant terms also need updating

• VBO:0014330 (Badger Face Welsh Mountain, United Kingdom...)
• VBO:0014331 (Badger Faced Welsh Mountain, United Kingdom...)

These geographic variants should both point to the same parent term after merge.

Additional Context

The breed has two color varieties (Torddu and Torwen), but these are NOT separate breeds - they are color morphs of the same breed, correctly represented as synonyms.

Related duplicate check: This was discovered during a systematic review of all sheep breeds in VBO (#XXX).

[allenbaron]

Additional evidence found in https://pmc.ncbi.nlm.nih.gov/articles/PMC8103502/ where these two terms are listed as synonyms.

[allenbaron]

Just noting that the initial report from Claude said FAO DAD-IS only used the "faced" synonym. Following the link it provided we only found "face". Here it's reporting that FAO uses the two interchangeably. Some hallucination in details, but conclusion that they are the same seems to be legit.