VARIETAL NAME: 'Vratsa 18'


Taxonomical and basic information
Varietal name:
'Vratsa 18'
Identification/ Accession n.:
12
Ingroup:
Morus alba s.l.
Species:
M. alba
Origin:
Bulgaria
Obtained:
1976
Morphological characteristics
Trunk:
Trunk circumference (cm):
38
Trunk colour:
Light brownish-grey


Shoots:
Colour of one-year old shoot:
Greyish brown
Lenticel density:
Medium
Lenticel shape:
Round
Buds:
Bud shape:
Medium triangular
Bud colour:
Yellowish brown
Bud size:
medium


Leaves:
Phyllotaxis:
Opposite decussate
Leaf shape:
Simple
Average leaf size: length (cm):
28.12
Average leaf size: width (cm)
17.86
Leaf size ratio:
High (>1.6 long)
Petiole size (cm):
6.08
Petiole range:
Long (41-70 mm)
Shape of leaf base:
Retuse
Shape of leaf apex:
Acute
Leaf blade tip:
Caudate
Leaf blade margin:
Crenate
Hairiness:
Glabrous
Glossiness:
Glossy


Reproductive structures
Sexual dimorphisem:
Monoecious
Inflorescence type:
Female
Inflorescence size:
Female infl. length (mm):
7.0
Female infl. diameter (mm):
6.0
Female infl. stalk length (mm):
8.0
Male infl. length (mm):
Male infl. diameter (mm):
Male infl. stalk length (mm):
Polygamous infl. length (mm):
Polygamous infl. diameter (mm):
Polyg. infl. stalk length (mm):
Infructescence:
Fruit weight (g):
1.042
Infructescence length (mm):
20.9
Infructescence width (mm):
11.6
Length of peduncle:
Medium
Infructescence colour:
Reddish black
Taste:
Balanced
Infructescence shape:
Irregular


Phenological descriptors
Date of bud burst (week):
13
Flowering date (week):
15
Date of infructescence ripening (week):
Medium to late
Uniformity of infructescence ripening:
Medium
Abundant autumn colouring (week):
Growth and yield attributes
Vigour:
Lenght (cm):
109
Number of lateral shoots:
20
Lenght of internode (cm):
6.3
Leaf No./meter:
Weight of 100 fresh leaves (g):
