Black Jack des Gerveilles

Registration n° 69831

Breeder: not recorded
Owners: Marion Riviere, Pauline Verdicchio
Sire: Jokister Valet de Coeur
Dam: Une Matinale des Gerveilles
Call name: Black
Date of birth: 10 May 2026
Country of birth & standing: France

Colour: Black & White
Coat: Broken
DNA tests: PLL-A, LOA, SCA & DM: Clear

Genetic indicators

COI — inbreeding

No common ancestor over 5 generations.

AVK — distinct ancestors

72.6%

45 distinct ancestors out of 62 possible. Among known ancestors only: 95.7%.

Pedigree completeness

75.8%

15 empty slots. The AVK takes them into account, so read both figures together.

Value for the breed's diversity

Rare pedigree — rarer than 92% of the Jack Russells born in the last 15 years (since 2012)

How often its ancestors (over 10 generations) appear in the pedigrees of the 253 recent dogs: using dogs with a rare pedigree helps keep diversity in the breed. Over: 6 generations 8 generations 10 generations

How these figures are calculated

COI — Wright's formula: F = Σ (½)^n₁+n₂+1 × (1 + F_A), summed over every path through a common ancestor A. The number of generations must be fixed for two dogs to be comparable: a more complete pedigree mechanically raises the figure.

AVK — distinct ancestors divided by the theoretical number of ancestors. Over 5 generations there are 62 possible slots. 100% means no ancestor appears twice.

Completeness — the share of slots actually filled in. The AVK is misleading without it: a half-empty pedigree shows a low AVK even with no inbreeding at all, simply because data is missing.

Pedigree

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Parents

Grandparents

Great-grandparents

Jokister Valet de Coeur ♂

France

Jokister So Handsome Boy Luca ♂White & Tan

France

All Jacks Who's That Boy ♂White & Tan

Italy

Lovely-Orange Ingrid ♀White & Tan

Russia

Jokister Sea Sex & Sun ♀White & Tan

France

Jacks Lair Phantom Lord ♂

France Alvarnos Madame Bovary ♀

Spain

Une Matinale des Gerveilles ♀

France

Black Jack dei Due Leoni ♂

Italy

Painted Black dei Due Leoni ♂

Italy Stella Maris of Fawnhill ♀

Italy

Roma des Gerveilles ♀

Italy

Standing Ovation dei Valigi ♂

Italy

Freeware Delle Syrenuse ♀

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Generations Photos

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Offspring and relatives

No offspring or siblings are recorded for this dog yet.