Genetic variation and genotype-environment interaction in annual ring structure in progeny test of plus trees of Sakhalin fir (Abies sachalinensis)
2008
Akutsu, H.(Hokkaido. Forest Products Research Inst., Asahikawa (Japan)) | Kita, K. | Uchiyama, K. | Kuromaru, M.
For improving the wood properties of Sakhalin fir (Abies sachalinensis) variation in annual ring structure and genetic variation in different environments were examined by X-ray densitometry. The specimens were sampled from 32- to 41-year-old open-pollinated families in progeny test stands, which were 74 families totaling 444 trees in Bibai and 24 families totaling 96 trees in Akkeshi. Six components were analyzed as growth ring components-ring width (RW), earlywood width (EW), latewood width (LW), ring density (RD), earlywood density (ED), and latewood density (LD). The values of LW and LD in Akkeshi were smaller than those in Bibai under the influence of low temperature and short sunlight hours in summer. Narrow sense heritability of ring components was 0.17-0.27 for width and 0.26-0.34 for density in Bibai and 0.47-0.79 for width and 0.26-0.66 for density in Akkeshi. The value of heritability of LW and LD in Akkeshi was different for other traits, probably because of the summer weather. The analysis using 23 common families in two stands indicated that interaction between families within provenance and stands was significant in LW, RD, ED, and LD. Therefore, seed zones are as necessary for wood density as resistance to weather damages and disease, or growth.
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