Four-year height growth variation among and within S0, S1 × S1, S1 open-pollinated, and S2 inbred jack pine families
- 1 September 1981
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Forest Research
- Vol. 11 (3) , 654-661
- https://doi.org/10.1139/x81-090
Abstract
After 4 years, inbreeding depression in tree height of jack pine (Pinusbanksiana Lamb.) was from 18 to 24% in S2 (second selfed generation) progenies compared with S0 (original female parents) open-pollinated progenies. This indicates a high degree of dominance for height growth. Crosses between S1 (first selfed generation) lines and open-pollinated progenies from S1 trees showed heterosis and relief from inbreeding depression so that vigor was restored to at least the level of the ancestral S0 parents. Genetic variance among S2 progenies was greatly increased indicating that inbreeding increased heritability of height growth.This publication has 0 references indexed in Scilit: