Treesearch
Genetic variation in rootability of cuttings from one-year-old western hemlock seedlings.
| Authors: | Frank Sorensen, Robert K. Campbell |
| Year: | 1980 |
| Type: | Research Note |
| Station: | Pacific Northwest Research Station |
| DOI: | https://doi.org/10.2737/PNW-RN-352 |
| Source: | Res. Note PNW-RN-352. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 8 p |
Download (PDF 157 KB): https://research.fs.usda.gov/download/treesearch/7618.pdf
Abstract
One-year-old western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings from three open-pollination families from eight locations in the Washington and Oregon Coast Ranges were cultured under accelerated growth conditions in a glasshouse. Forty cuttings from each of five seedlings (open-pollination siblings) per family were then placed in a rooting box in a randomized block design with five replications. Percentages of cuttings rooted after 1 year in the bed were analyzed in a hierarchal design.Average rooting percentage was 72.4 percent. Significant effects were associated only with replication, siblings-in-families-in-provenances (S/F/P), and with the interaction, S/F/P x replication. The last two together accounted for 73 percent of the variance.
The results indicated that additive genetic effects were not important to rooting success, but that dominance and unique clone-effects probably were.