Black Gem (M48-42)

Black Gem M48 42 Field 1 Black Gem M48 42 Field 2

Black Gem (M48-42) is an early ripening black multipurpose seedless grape from Australia, bred by CSIRO and released to industry in 2010. It has a short growing season with low yield potential. Vitis vinifera, the selected clone for data analysis was Black Gem M42-48. This variety is disease tolerant and can be dried to produce currants or juice an dwine. Wines have intense colour. The currants and juice and are high in antioxidants. It is very low vigour and must be grown on rootstocks. This variety is protected under Australian Plant Breeders Rights legislation.

Variety: Black Gem (M48-42)
Colour: Black
Seeded: No
Bud Burst Days (July 1=0): Early 71.00
Flowering Days (July 1=0): Medium 105.00
Veraison Rating: Very Early 167.00
Harvest 22 Brix Days (July 1=0): Early 214.00
Seasonality (days): Short 144.00
Leaf Area Index (m2/m2): 2.70
Bunches Per Shoot: 2.40
Yield Potential: Low
Berry Weight (g): 0.86
Total Soluble Solids (° Brix): 21.20
pH: 3.77
Titratable Acidity (g/L): Very High 6.51
Tartaric Acid (g/L): 6.18
Malic Acid (g/L): 4.03
Tartrate Malate Acid Ratio: Medium 1.53
Anthocyanins (mg/g): High 1.52
Phenolics (au): 1.14
Yeast Assimilable Nitrogen (mg/)L: 267
Potassium (mg/)L: 2,040.00