|
PROCEEDINGS: Index of Abstracts
GENETIC AFTEREFFECTS OF INCREASED TEMPERATURE IN
LARIX
Michael S. Greenwood and Keith W. Hutchison
Ruth Hutchins Professor of Tree Physiology, Department
of Forest Ecosystem Science; and Associate Professor of Biochemistry,
Department of Biochemistry, Microbiology and Molecular Biology,
respectively, University of Maine, Orono, ME 04469.
We tested the hypothesis that temperature during gametogenesis
and embryogenesis can affect progeny genotype and phenotype. Identical
crosses were made among cloned parents of Larix spp. inside and
outside a greenhouse, where the temperature inside averaged 4oC
above the outside temperature. Significant growth differences as
a function of crossing environment were observed. When the crosses
were grown in the same environment the phenotypes of crosses made
inside tended to resemble more southern ecotypes. In addition, segregation
distortion at the chlorophyll- a/b-protein locus as a function of
crossing environment was observed. These results support the hypothesis
that progeny phenotype and genotype can exhibit aftereffects that
are a function of crossing environment.
|
Proceedings
