Spontaneous Hybridization between Pinus mugo and Pinus sylvestris at the Lithuanian Seaside: A Morphological Survey
Table 3
Representatives of putative P. sylvestris × P. mugo hybrids grouped into two groups according to the WSS value. The WSS weights sum up to 1. Pure P. sylvestris or P. mugo subsp. uncinata WSS indexes add up to 1 and 0, respectively (based on our observation; not shown). Number at the tree ID indicates the tree age (at least, based on phenotype). Trait abbreviations are explained in Table 1.
Tree ID
BARK
NEEDLE
APOPH
UMBO
CONSYM
TIPSU
SHOOT
NDENSE
WSS
H
D
Weight adult
0.2
0.3
0.1
0.05
0.05
0.05
0.2
0.05
1
Weight young
0.1
0.4
—
—
—
0.2
0.2
0.1
1
Min. value = 0
Grey
Green
Hook
Unbord.
Asym.
Yes
Grey
Dense
0-uncinata
Max. value = 1
Brown
Grey
Flat
Border
Sym.
No
Straw
Sparse
1-sylvestris
PD43 (60)
0.5
1
1
0.5
1
1
0.5
1
0.78
9
25
KN10 (60)
0.5
1
0
1
1
0.5
0.5
1
0.68
15
25
PR51 (40)
1
0
1
0.5
1
1
1
1
0.68
10
18
PAV12 (20)
0.5
1
0.5
0.5
1
0.5
0.5
1
0.70
10
10
KD43 (10)
0.5
1
0.3
0
0.5
0
1
1
0.71
2
4
KD59 (10)
0.5
1
0.5
0
0.5
1
0.5
1
0.68
2
4
PAV10 (15)
0.5
1
—
—
—
1
0
1
0.75
2
4
KD54 (4)
0.5
1
—
—
—
1
0.5
1
0.85
1
2
KD55 (6)
0.5
1
—
—
—
1
0.5
1
0.85
1
2
PD58 (5)
0.5
1
—
—
—
1
0.5
1
0.85
0
2
PAV8 (8)
0.5
1
—
—
—
1
0.5
1
0.85
1
3
PAV46 (5)
0.5
1
—
—
—
1
0.5
1
0.85
1
2
PD60 (5)
0.5
1
—
—
—
1
0.5
1
0.85
0
2
Mean group A (H S × M)1
0.54
0.92
0.55
0.42
0.83
0.85
0.54
1.00
0.77
KD48 (60)
0.5
0
0.5
1
0.5
0.5
0.5
1
0.40
15
30
KR43 (60)
0.5
0
0.5
0
0.5
0.5
0.5
0.5
0.33
4
15
KD57 (60)
1
0
0.5
0.5
0.5
0
1
0
0.50
12
25
KD56 (60)
1
0
0
0
0
0.5
0.5
0.5
0.35
11
25
KD51 (60)
0.5
0
0.5
0.5
0.5
0
1
0
0.40
10
30
KD58 (60)
1
0
0.5
0.5
0.5
1
0
0.5
0.38
12
25
KAV7 (60)
0.5
0.5
0.5
0.5
0
1
0
1
0.43
10
25
KAV50 (60)
0.5
0.5
0.5
0.5
0
1
0
1
0.43
8
18
PD8 (60)
0.5
0
0.5
0.5
0.5
0.5
0.5
1
0.40
18
20
KD49 (5)
0.5
0.5
1
0
1
0.35
0
3
Mean group B (H M × S)1
0.67
0.17
0.44
0.44
0.31
0.61
0.39
0.61
0.39
H M × S abbreviates hybrids mugo × sylvestris, and H S × M vice versa.
