Tore Skrøppa, Halvor Solheim, Arne Steffenrem. (2015). Genetic variation, inheritance patterns and parent–offspring relationships after artificial inoculations with Heterobasidion parviporum and Ceratocystis polonica in Norway spruce seed orchards and progeny tests. Silva Fennica vol. 49 no. 1 article id 1191. https://doi.org/10.14214/sf.1191

Keywords: blue stain; heritability; root and butt rot; lesion length

Highlights: Genetic variation is demonstrated in response to artificial inoculations with Heterobasidion parviporum and Ceratocystis polonica both between parents and their offspring;Strong relationships are observed between the male parents and their off-spring, less so between the female parents and their offspring.

Abstract | Full text in HTML | Full text in PDF | Author Info

Inoculations with the two fungi Heterobasidion parviporum and Ceratocystis polonica were made in two series of progeny tests each containing full-sib families planted at two sites and on grafts of the parents in two seed orchards. Significant variation among families in lesion lengths after inoculation was found for both fungi and a predominantly additive inheritance was indicated. The estimates of narrow sense heritability were 0.13 and 0.22 for H. parviporum and C. polonica, respectively. The estimate of the genetic correlation between the lesion lengths of the two fungi was as low as 0.12. Significant variation in lesion lengths was also found among parental clones, and within ramets of the same clone, in the seed orchards. In one of the series a high positive correlation (r = 0.88) was found between the H. parviporum lesion lengths of the male parents and offspring, but not for the female parents and off-spring. The results confirm earlier conclusions that the genetic variation and heritabilities are large enough for practical breeding for resistance.

Skrøppa, Norwegian Forest and Landscape Institute, Box 115, 1431 Ås, Norway E-mail: tore.skroppa@skogoglandskap.no
Solheim, Norwegian Forest and Landscape Institute, Box 115, 1431 Ås, Norway E-mail: halvor.solheim@skogoglandskap.no
Steffenrem, Norwegian Forest and Landscape Institute, Box 115, 1431 Ås, Norway E-mail: arne.steffenrem@skogoglandskap.no

article id 246, category Research article

Maria Jonsson. (2008). Live-storage of Picea abies for two summers after storm felling in Sweden. Silva Fennica vol. 42 no. 3 article id 246. https://doi.org/10.14214/sf.246

Keywords: Norway spruce; blue stain; MC; storage decay; windthrown

Abstract | View details | Full text in PDF | Author Info

After recent severe storm fellings in Sweden, as harvest, transport, and storage capacities were insufficient, interest in live-storage (leaving windthrown trees in the stand) increased. This study follows windthrown Norway spruce (Picea abies (L.) Karst.) trees during 20 months, i.e. two summers, of live-storage in southern Sweden. Moisture content, blue stain, and storage decay were compared in trees from a site with all trees windthrown and a site with scattered windthrows. After the first summer of live-storage, the quality losses were small. After 20 months, the trees had dried significantly and had numerous infestations of blue stain and storage decay. Trees from the site with scattered windthrows were of better quality compared to trees from the site with all trees windthrown. Live-storage is a suitable method for one year of storage, but the second year losses in wood quality are considerable.

Jonsson, Swedish University of Agricultural Sciences, Dept. of Forest Products, Uppsala, Sweden E-mail: maria.jonsson@sprod.slu.se

Click this link to register to Silva Fennica.

If you are a registered user, log in to save your selected articles for later access.

Contents alert

Your selected articles

Follow @SilvaFennica