Heritability of stem height and BHD in Pinus sylvestris L
2000
Kurm, M. | Tamm, Ue. (Estonian Agricultural Univ., Tartu (Estonia). Forest Research Inst.) | Moels, T. (Estonian Agricultural Univ., Tartu (Estonia). Inst. of Zoology and Botany) | Joepera, E. (Agricultural Registers and Information Centre, Tartu (Estonia))
The progeny trials of the Scots pine founded in Jaervselja Training and Experimental Forest District in 1966 and 1968 by E. Pihelgas were analysed to estimate the heritability of height and diameter characteristics, and also the dependence of progeny properties on the mother tree phenotype. Heritability h sup(2) was calculated from the mother tree and residual variance components assuming a limited number of father trees for each progeny. Using the ML, REML and Type 3 estimation procedures, the heritability of the stem height was found approximately equal to 0.85, and it was 0.24 for the BHD. Considering the mother tree phenotypic characteristics, the height, height deviation, and BHD were significantly correlated with the progeny BHD while the progeny height was probably correlated only with the mother tree height deviance (p=0.007). Comparing the low BHD heritability with the high correlation between the progeny BHD and mother tree phenotype, it is conjectured that besides the genetic heritability some other (epigenetic) channels of transmitting parents' properties to the progeny can also be found
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