CHAMBER II • THE GRAPE ATLAS & DNA LINEAGES

Ampelography, Genetics & Migration

Every grape cultivar is an architectural organism: physical skin thickness, bunch morphology, ripening phenology, and volatile precursor synthesis tracked across DNA pedigrees and 25 years of acreage migration.

I. Ampelographic Pedigrees & Clonal Mutations

USDA ARS National Clonal Germplasm Repository accessions and DNA-confirmed parental crosses.

USDA GRIN AMPELOGRAPHIC GERMPLASM REPOSITORY • DVIT 1238 (Davis Clonal Repository)

Cabernet Sauvignon Pedigree

Classification: Spontaneous Field Cross • Origin: Bordeaux (Gironde), France

c. 1650 (DNA confirmed by Bowers & Meredith, UC Davis, 1996)

Parent Cultivar ACabernet FrancPaternal Pollen

Parent Cultivar BSauvignon BlancMaternal Ovule

→

Offspring LineageCabernet SauvignonVitis vinifera L.

Genetic Sensory Traits & Organoleptic Blueprint

Cassis, blackcurrant, cedar wood, green bell pepper (IBMP), graphite, structured age-worthy tannins.

II. The 25-Year Grape Migration Atlas (1995–2025)

USDA NASS acreage trends: the rise of Cabernet (+66%), the decline of Merlot (-48%), and coastal Pinot Noir expansion.

Compare with:

USDA NASS 25-YEAR CALIFORNIA ACREAGE SURVEY (1995–2025)

Cabernet Sauvignon vs. Merlot

Trajectory: Aggressive Expansion

20-Yr Acreage Shift+66.3%2025: 96,800 ac

Cabernet Sauvignon

Merlot

Acreage in Bearing Vines

Geographic Migration Corridor

Expanded from Napa/Sonoma valley floors into hillside terraces, Paso Robles, Lodi high-tier vineyards, and Lake County benchlands.

The Economic & Cultural Driver

Unprecedented global luxury consumer demand and sustained $8,000+/ton grape pricing incentivized growers to graft over lesser varieties to Cabernet.