Naslov
First results from Fraxinus angustifolia Vahl. half-sib progeny tests in Croatia

Autori
Bogdan, Saša ; Kajba, Davorin ; Katičić-Trupčević, Ida

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
FORUM GENETIK - WALD - FORSTWIRTSCHAFT 2004 Results of genetic trials and laboratory studies and their applications in practical forestry

Mjesto i datum
Teisendorf, Njemačka, 20.09.2004. - 22.09.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
fraxinus agustifolia; progeny tests; genetic variation

Sažetak
Narrow-leaved ash (Fraxinus angustifolia Vahl.) is one of the most valuable forest species in Croatia, both economically and ecologically. Pannonean lowland area along rivers Drava, Danube and Sava as well as submediteranean region along rivers Mirna (Istria), Zrmanja, Krka, Cetina and Neretva (Dalmatia) is natural range of the species distribution in Croatia. In mentioned regions narrowed-leaved ash occupies sites with various environmental conditions due to local climate differences and soil types (specially soil moisture regimes). According to Anić (1996, 1997) narrow-laved ash in central Croatia (Pannonean valley) occupies three main groups of sites: the lowest microdepresions in which ash is the main forest species, higher microdepresions and lower microelevations where ash is a member of pedunculate oak forests and finally, higher microelevations where ash is a member of pedunculate oak and hornbeam forests. These sites occur in mosaics and could be refered as 'Selective Neighbourhood Environments (SENs) (Eriksson and Ekberg 2001). Species genetic variability is its main 'survival weapon' in changeable environment. Therefore knowledge about species genetic variability and its conservation should be one of the most important goals in sustainable forestry. The goal of this investigation is to increase knowledge about narrow-leaved ash genetic variability in part of its distribution range in Croatia. The investigation was conducted as follows ; In autumn 1999th the seed were collected from 75 trees from 8 natural populations along river Sava. Collected seed represents sample from different site conditions. Half-sib families were grown in nursery for two years. In spring 2002. three half-sib progeny test were established at sites that represent three main groups of natural narrow-leaved ash sites in Croatia: 1) Test 'Novska' , 2) Test 'Nova Kapela' and 3) Test 'Otok' Tests were planted according to randomized block design with five replications. Half-sib families were represented as six tree plots per replications planted in spacing 2.0 x 2.0 m. In spring 2003. after one growing season diameters at 5 cm above ground level (D) and heights (H) of all plants were measured. Flushing were examined weekly between 10. 4. and 22. 5. 2003. on every plant in two replications in tests 'Novska' and 'Otok' using a 6 points scale. The investigation led to following results ; Although the plants are only three years old and still very sensitive to weed, rodents and game, survival rates, at the end of the first growing season in the field, are quite good. Results show there is no statistically significant differences between populations, except for bud burst in the test 'Otok'. In contrast, families were significant source of variability for all investigated traits in both tests. Presented results indicate there is no genetic differentiation between populations originated from various SENs, but within-population variation is significant.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo, Politologija

POVEZANOST RADA