VARIETAL NAME: 'P 4'


Taxonomical and basic information
Varietal name:
'P 4'
Identification/ Accession n.:
9
Ingroup:
Morus alba s.l.
Species:
Morus alba
Origin:
Bulgaria
Obtained:
1960
Morphological characteristics
Trunk:
Trunk circumference (cm):
50
Trunk colour:
Greyish brown


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


Leaves:
Phyllotaxis:
Alternate spiral
Leaf shape:
Simple
Average leaf size: length (cm):
21.94
Average leaf size: width (cm)
15.42
Leaf size ratio:
Medium (1.3-1.5)
Petiole size (cm):
3.6
Petiole range:
Medium (21-40mm)
Shape of leaf base:
Cordate
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):
11.0
Female infl. diameter (mm):
8.0
Female infl. stalk length (mm):
11.0
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):
1.087
Infructescence length (mm):
18.2
Infructescence width (mm):
10.3
Length of peduncle:
Long
Infructescence colour:
Reddish black
Taste:
Balanced
Infructescence shape:
Ovoid/globose


Phenological descriptors
Date of bud burst (week):
11
Flowering date (week):
15
Date of infructescence ripening (week):
Medium
Uniformity of infructescence ripening:
Medium
Abundant autumn colouring (week):
Growth and yield attributes
Vigour:
Lenght (cm):
122.9
Number of lateral shoots:
19
Lenght of internode (cm):
5.3
Leaf No./meter:
Weight of 100 fresh leaves (g):
