Blackberry (Rubus fruticosus) MARYNA PBR

Blackberry (Rubus fruticosus) 'Maryna' PBR

A new, thornless, and primocane-fruiting (remontant) variety, created for the production of premium dessert fruit with exceptional shelf life.

The 'Maryna' variety is an absolute novelty bred with a clear goal—to provide the fresh fruit market with visually perfect and exceptionally tasty blackberries. It impresses customers with its extraordinary fruit size and delights growers with its long post-harvest shelf life. Thanks to its medium vigor, this variety is specially optimized not only for field planting but also for intensive pot cultivation to achieve an efficient double harvest.

Main advantages of the variety:

• Premium fruit quality: Exceptionally large (over 7 g), attractively elongated, and very tasty (13.0% Brix).
• Long shelf life: Fruits stay fresh, firm, and visually perfect for up to 7 days after harvest.
• Double fruiting (remontant): Optimized for a very early summer harvest followed by an autumn harvest.
• 100% thornless: Firm canes guarantee comfortable handling.
• Low susceptibility to fruit rot.

Origin and Registration

• Origin: Poland. Co-financed by the POIR project in cooperation with Global Plant Genetics.
• Registration: Originally tested as clone NR 1716009, applied for Plant Breeder's Rights under the name 'Maryna'.

Variety Characteristics

Shrub

• Vigor: Characterized by medium (moderate) and easily manageable growth.
• Canes: Firm, stiff, and completely thornless.
• Use: An ideal dessert variety for commercial pot cultivation, aimed at selling top-quality fresh fruit.

Fruit

• Size and Shape: Exceptionally large fruits with an attractive elongated shape. The average weight ranges from 7.1 g to 7.3 g.
• Firmness and Shelf Life: They reach very high firmness (4.5 out of 5). The variety stands out for its long shelf life, retaining quality even a week after picking.
• Taste and Composition: The berries are exceptionally tasty and sweet. They have a high sugar content (13.0% Brix) and pleasantly low acidity (1.25).

Resistance and Requirements

• Diseases: The clone has shown low susceptibility to fruit rot, which significantly contributes to its excellent storability.
• Location: Requires a sunny spot, high-quality well-draining soil (or substrate), and regular watering.

Cultivation Recommendations

• Fruiting Type: A remontant (primocane-fruiting) variety. It bears fruit on both second-year (floricane) and first-year (primocane) wood.
• Container Growing: The variety is specially optimized for pot cultivation (e.g., under polytunnels), giving the grower maximum control over fruit quality and harvest cleanliness.

Harvest and Yield

• Harvest Time: The first wave on floricanes begins very early, at the end of June (around June 30). The second wave on primocanes arrives in early September (around Sept 2).
• Yield: High. When grown in pots under tunnels, the yield is approximately 1.1 kg per floricane and an additional 0.5 kg per primocane.