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Genetic variation in
Pinus brutia Ten. seed stands and seed orchards for
growth, stem form and crown characteristics
Süleyman Gülcü* and Sultan Çelik
Suleyman
Demirel University, Faculty of Forestry, 32260, Isparta,
Turkey.
*Corresponding author. E-mail:
sgulcu@orman.sdu.edu.tr. Tel.: +90 246 211 31 57.
Accepted
20 August, 2009 |
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In this study, some adaptive traits (growth, stem, branching
and crown characteristics) in a seven-year old plantation of
Turkish red pine (Pinus brutia Ten.) were studied in
2008. The experiment was established by using 1+0 bare-root
seedlings from 5 seed stands and 5 seed orchards from the
same origins in 2001. Randomized block design with three
replications was used in the field. There were a total of
100 families, 10 from each of these 10 populations were used
in the experiment. Each family was represented with 10
seedlings in each replication. Populations and families
within each population were significantly different for all
traits both in the seed stands and in the seed orchards. The
percent of genetic variation caused by population was
considerable except for branch length ranging from 0.19 to
18.28% especially in the seed stands. Variance components
due to families in the seed orchards were in general higher
than those in the seed stands. Individual heritabilities
varied in 0.45 – 0.90 range. Family heritabilities ranged
from 0.76 to 0.88. These results indicated that combined
population, family and within family selection for studied
traits would result in considerable gain in this species.
Key
words:
Genetic variation, heritability, Pinus brutia Ten.,
seed stand, seed orchard. |
