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Evaluation
of seed production of scots pine (Pinus sylvestris
L.) clonal seed orchard with cone analysis method
Ahmet
Sivacioğlu* and Sezgin Ayan
Kastamonu
University, Faculty of Forestry, Department of Forest
Engineering, 37200 Kastamonu, Turkey.
*Corresponding author. E-mail:
asivacioglu@kastamonu.edu.tr.
Tel: +90 3662150900. Fax: + 90 366 2152316.
Accepted 21 October, 2008 |
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This research was carried out to investigate seed production
in a 13 years-old scots pine (Pinus sylvestris L.)
clonal seed orchard, including 30 clones. Eight of cone and
seed traits as number of fertile and infertile scales, cone
volume, cone number, filled and empty seed number, seed
efficiency and 1000 seed weight were studied. Significant
differences existed between the clones in all traits. The
overall mean of fertile scale number was 30.1 with a range
of 19.8 to 42.2 among the clones while infertile scale
number was 41.1 with a range of 34.1 to 51.5. Overall mean
of filled seed number, empty seed number and filled seed
percentage was 11.6, 15.0 and 43.6%, respectively. The cone
number and cone volume varied 33.4 to 287.88 and 6.6 to 18.2
cm3 among the clones, respectively. The average
seed efficiency for all clones was rather low and 17.9%. The
overall mean of 1000 seed weight was found 10.9 g with a
range of 8.6 to 13.2 g. As to 1000 seed weight and filled
seed number values, 0.68-19.33 kg of filled seeds per
hectare varying among the clones can be produced in this
orchard. The cluster dendrogram produced two groups; 18, 27,
26, 30 numbered clones in the first group and the others.
Key words:
Pinus sylvestris, seed, orchard, clone, cone. |
