Naslov
Selection and breeding of willows (Salis spp.) for SRF

Autori
Kajba, Davorin ; Katičić, Ida.

Izvornik
Indian journal of ecology (0304-5250) 38 (2011); 91-94

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Biomass production; Salix clones; SRC; Croatia

Sažetak
The clonal tests of the arborescent willows in Croatia include the autochthonous White Willow(Salix alba), interracial hybrids of the autochthonous white willow and English `cricket` Willow (S. alba var. calva), interspecies hybrids (S. matsudana x S. alba), as well as multispecies hybrids of willows. Selection for this purpose is done in natural populations of white willow, white willow hybrid families, and hybrid families of white willow interspecies hybrid with other species. These are mainly the Chinese Willow (Salix alba x S. matsudana) of the F1 and F2 generation, as well as backcrosses. Special attention has been paid to the selection of the plus variants on the basis of transgression variability. Testing of arborescent willows continued aiming at identification of clones with greatest production potential, particularly on so called marginal sites i.e. abandoned agricultural soils and/or sites that are not suitable for growing more valuable tree species. CLonal tests were established with clones originated to White Willow (S. alba) and from different crossing combinations of White Willow and CHinese Willow (S. matsudana). In one clonal test, on the heavy clay type of soils, in two-year rotation, mean biomass production of all studied clones (more than 30) was 9.3 t DM ha-1. The highest biomass production of White Willow (Salix alba) was performed by clones `B44`, `V093` i `V052` (17.5, 13.7 and 12.2 DM ha-1, respectively). Above mentioned clones have shown specific adaptedness on tested conditions through survival and sprouting ability. In other two clonal test with hybrids of White Willow an Chinese Willow (more than 50 clones), mean biomass production vary from 10.7 to 28.8 t DM ha-1a-1 at the first and second two year rotation period. At one of these experimental plots, with regular agrotechical treatments, the highest biomass production as well as the best adaptedness and phenotypic stability on testing sites was shown by two clones ( `V 374`, `V 461`, 25.8 - 27, 6 t DM ha-1a-1) originated from backcross hybrid S. matsudana x (S.matsudana x S. alba) and by one S. alba clone (`V 95`, 2808 t DM ha-1a-1). These results indicated significant potential of Chinese Willow for further breeding aimed at biomass production in short rotations.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo

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