Structure of genetic variation in vegetative phenology of Cedrela odorata L.: implications for tree breeding

New Forests ◽  
2021 ◽  
Author(s):  
Edgar Hernández-Máximo ◽  
J. Jesús Vargas-Hernández ◽  
Javier López-Upton ◽  
Vicente Sánchez-Monsalvo
Keyword(s):  
Genetic Variation ◽  
Tree Breeding ◽  
Cedrela Odorata ◽  
Vegetative Phenology

Genetic structure of western red cedar populations in the Interior West

1994 ◽  
Vol 24 (4) ◽  
pp. 670-680 ◽  
Author(s):  
G.E. Rehfeldt
Keyword(s):  
Genetic Variation ◽  
Regression Models ◽  
Geographic Origin ◽  
Tree Breeding ◽  
Single Population ◽  
Red Cedar ◽  
Common Gardens ◽  
Multiple Regression Models ◽  
Western Red Cedar ◽  
Interior West

Forty-one seedling populations of western red cedar (Thujaplicata Donn ex D. Don) were compared in five environmentally disparate common gardens. Separate tests of 25 wind-pollinated families from a single population were conducted on two of the sites. Genetic differences among populations and families were detected for variables related to growth and winter hardiness. Statistically significant multiple regression models with R2 values as high as 0.53 related genetic variation among populations to the elevation and geographic origin of the seed. The slope of the clines, however, was so gentle that populations must be separated by about 600 m in elevation or by 2° latitude before one can be reasonably certain of genetic differentiation. While genetic variation among families suggests that gains in the growth of western red cedar can be made through tree breeding, establishing evaluation trials for estimating genetic variances, breeding values, and responses to selection is problematic on sites in the interior.

scholarly journals Evolvability of Drought Response in Four Native and Non-native Conifers: Opportunities for Forest and Genetic Resource Management in Europe

2021 ◽  
Vol 12 ◽  
Author(s):  
Silvio Schueler ◽  
Jan-Peter George ◽  
Sandra Karanitsch-Ackerl ◽  
Konrad Mayer ◽  
Raphael Thomas Klumpp ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Norway Spruce ◽  
Common Garden ◽  
Tree Breeding ◽  
Drought Response ◽  
Silver Fir ◽  
European Larch ◽  
Drought Sensitivity ◽  
Seed Transfer ◽  
Intraspecific Genetic Variation

Intraspecific genetic variation in drought response is expected to play an important role in determining the persistence of tree populations in global change as it (1) allows for spontaneous selection and local adaptation of tree populations, (2) supports assisted seed transfer of less-drought-sensitive provenance, and (3) enables the integration of drought-sensitivity traits into tree breeding. Estimating the potential of such adaptation options requires quantitative genetic knowledge of drought sensitivity across significant parts of species distributions and a comparative assessment of genetic variation within economically and ecologically important tree species. We quantified genetic variation within and among populations of four conifers growing within common garden experiments in the drought-prone eastern Austria. This region experienced three strong drought periods between 1980 and 2010 that resulted in significant reductions in radial growth. Among the four tested species, Douglas-fir revealed the highest resistance during drought and silver fir the best recovery after drought, while European larch and Norway spruce showed the lowest resistance. High genetic variation among populations and phenotypic stability across all three drought events was found for Norway spruce and silver fir, but not for the other species. Heritability and evolvability of drought traits, both approximated via genetic repeatability, revealed strong differences among populations of all four species. Repeatability and evolvability for resistance were highest in Norway spruce and, for recovery, highest in European larch. Our comparison indicates that the mean drought sensitivity of a species is not related to the intraspecific genetic variation in drought response. Thus, also highly drought-sensitive species, such as Norway spruce and European larch, harbor significant genetic variation in drought response within and among populations to justify targeted tree breeding, assisted gene flow, and supportive forest management to foster local adaptations to future conditions.

Genetic variation in Costa Rican populations of the tropical timber species Cedrela odorata L., assessed using RAPDs

1997 ◽  
Vol 6 (12) ◽  
pp. 1133-1145 ◽  
Author(s):  
A. C. M. Gillies ◽  
J. P. Cornelius ◽  
A. C. Newton ◽  
C. Navarro ◽  
M. Hernández ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Costa Rican ◽  
Timber Species ◽  
Cedrela Odorata ◽  
Tropical Timber

Labeled scales (e.g., category, Likert, VAS) and invalid across-group comparisons: What we have learned from genetic variation in taste.

2013 ◽  
Author(s):  
L. M. Bartoshuk ◽  
◽  
V. B. Duffy ◽  
K. Fast ◽  
B. G. Green ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Group Comparisons

Genetic Variation Linked to Aggression in Healthy Males

2006 ◽  
Vol 36 (17) ◽  
pp. 39
Author(s):  
PATRICE WENDLING
Keyword(s):  
Genetic Variation ◽  
Healthy Males
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