scholarly journals Assessing the relationship between height growth and molecular genetic variation in Douglas-fir (Pseudotsuga menziesii) provenances

2016 ◽  
Author(s):  
Charalambos Neophytou ◽  
Anna-Maria Weisser ◽  
Daniel Landwehr ◽  
Muhidin Šeho ◽  
Ulrich Kohnle ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Variation ◽  
Genetic Differentiation ◽  
Growth Performance ◽  
Pseudotsuga Menziesii ◽  
Phenotypic Variation ◽  
Microsatellite Loci ◽  
Variety Versus ◽  
Height Growth ◽  
Douglas Fir

Douglas-fir (Pseudotsuga menziesii) is a conifer tree native to western North America. In central Europe, it shows superior growth performance and is considered a suitable substitute for tree species impaired in vitality due to climate change. Maintenance and improvement of growth performance in a changing environment is a main challenge for forest tree breeders. In this context, genetic variation as a factor underlying phenotypic variation, but also as the basis for future adaptation, is of particular interest. The aims of this study were to analyse (i) genetic diversity of selected Douglas-fir provenances, (ii) variation in height growth among provenances, and (iii) to assess the link between genetic and phenotypic variation height growth. Genotyping was done on microsatellite loci. Effects of provenance, genotype, and site on height growth were assessed by fitting mixed linear models. The most significant genetic differentiation was observed between provenances of the coastal variety, versus a provenance of the interior variety originating from British Columbia. Although genetic differentiation among provenances of the coastal variety was lower, genetic structures within this variety were identified. Moreover, genetic diversity showed a latitudinal gradient with the southernmost provenances being more diverse, probably reflecting the species' evolutionary history. The modelling approach revealed that height growth differed significantly by provenance, site, and the interaction between site and provenance, demonstrating that height growth is under strong genetic control. Additionally, this analysis showed that genetic variation captured by the genotyped microsatellite loci was significantly related to variation in height growth, providing statistical evidence for a genetic component in the observed phenotypic variation.

Genetic variation within and relationships among five subpopulations of Slovak Thoroughbred

2004 ◽  
Vol 52 (3) ◽  
pp. 259-265
Author(s):  
Daniela Šátková-Jakabová ◽  
J. Trandžík ◽  
Ľudmila Hudecová-Kvasňáková ◽  
Erika Hegedüšová-Zetochová ◽  
A. Bugarský ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Variation ◽  
Genetic Differentiation ◽  
International Society ◽  
Microsatellite Loci ◽  
Genetic Relationships ◽  
Allele Frequencies ◽  
Weinberg Equilibrium ◽  
Hardy Weinberg Equilibrium

Genetic variation at six microsatellite loci was analysed for five Thoroughbred subpopulations to determine the magnitude of genetic differentiation and the genetic relationships among the subpopulations. Significant deviations from Hardy-Weinberg equilibrium were shown for a number of locus-population combinations, with all subpopulations. The genetic diversities and relationships of five Thoroughbred subpopulations were evaluated using six microsatellites recommended by the International Society of Animal Genetics (ISAG). The allele frequencies, the effective numbers of alleles, and the observed and expected heterozygosities were calculated. POPGENE v. 1.31 (Yeh et al., 1997) was used to test for deviations from the Hardy-Weinberg (H-W) equilibrium and to assign FIS estimates (Weir, 1990). The utility of microsatellites for evaluating genetic diversity of horses is discussed.

scholarly journals Assessing the relationship between height growth and molecular genetic variation in Douglas-fir (Pseudotsuga menziesii) provenances

2016 ◽  
Vol 135 (3) ◽  
pp. 465-481 ◽  
Author(s):  
Charalambos Neophytou ◽  
Anna-Maria Weisser ◽  
Daniel Landwehr ◽  
Muhidin Šeho ◽  
Ulrich Kohnle ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Pseudotsuga Menziesii ◽  
Molecular Genetic ◽  
Height Growth ◽  
Douglas Fir ◽  
Molecular Genetic Variation ◽  
The Relationship

scholarly journals Genetic diversity in Tunisian horse breeds

2017 ◽  
Vol 60 (2) ◽  
pp. 153-160 ◽  
Author(s):  
Bayrem Jemmali ◽  
Mohamed Mezir Haddad ◽  
Nawel Barhoumi ◽  
Syrine Tounsi ◽  
Faten Lasfer ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Variation ◽  
Genetic Structure ◽  
Genetic Differentiation ◽  
Microsatellite Loci ◽  
Genomic Dna ◽  
Genetic Distances ◽  
Jugular Veins ◽  
Blood Samples ◽  
Important Amount

Abstract. This study aimed at screening genetic diversity and differentiation in four horse breeds raised in Tunisia, the Barb, Arab-Barb, Arabian, and English Thoroughbred breeds. A total of 200 blood samples (50 for each breed) were collected from the jugular veins of animals, and genomic DNA was extracted. The analysis of the genetic structure was carried out using a panel of 16 microsatellite loci. Results showed that all studied microsatellite markers were highly polymorphic in all breeds. Overall, a total of 147 alleles were detected using the 16 microsatellite loci. The average number of alleles per locus was 7.52 (0.49), 7.35 (0.54), 6.3 (0.44), and 6 (0.38) for the Arab-Barb, Barb, Arabian, and English Thoroughbred breeds, respectively. The observed heterozygosities ranged from 0.63 (0.03) in the English Thoroughbred to 0.72 in the Arab-Barb breeds, whereas the expected heterozygosities were between 0.68 (0.02) in the English Thoroughbred and 0.73 in the Barb breeds. All FST values calculated by pairwise breed combinations were significantly different from zero (p  <  0.05) and an important genetic differentiation among breeds was revealed. Genetic distances, the factorial correspondence, and principal coordinate analyses showed that the important amount of genetic variation was within population. These results may facilitate conservation programs for the studied breeds and enhance preserve their genetic diversity.

scholarly journals Soil texture and other site-level factors differentially affect growth of Scotch broom (Cytisus scoparius) and Douglas-fir (Pseudotsuga menziesii) seedlings in the western Pacific Northwest

2021 ◽  
Author(s):  
David Carter ◽  
Robert A. Slesak ◽  
Timothy B. Harrington ◽  
Anthony W. D’Amato
Keyword(s):  
Pacific Northwest ◽  
Pseudotsuga Menziesii ◽  
Height Growth ◽  
Douglas Fir ◽  
Western Pacific ◽  
Limiting Factor ◽  
Cytisus Scoparius ◽  
Invasive Shrub ◽  
Scotch Broom ◽  
The Western Pacific

The invasive shrub Scotch broom (Cytisus scoparius (L.) Link) is a pervasive threat to regenerating Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) stands in the Pacific Northwest, USA. Field observations indicate that the susceptibility of areas to Scotch broom invasion and dominance can vary by site. We selected ten sites throughout the western Pacific Northwest that spanned a gradient of soil textures and other factors to test the site-specific susceptibility of Douglas-fir to overtopping by Scotch broom. We expected to find that the ability of Scotch broom to dominate a site was mediated by site-level factors, particularly those influencing soil water – the most limiting factor to growth in the region. We found Scotch broom and Douglas-fir were inversely affected by site-level factors. In general, Douglas-fir absolute height growth rates were more competitive with those of Scotch broom on fine-textured soils than on more coarsely textured soils. We also found Douglas-fir to have a more dramatic response to increasing down woody material than Scotch broom. Scotch broom height growth approached an asymptote at 3 m. Sites with fast-growing Douglas-fir were able to surpass this height six to seven years after planting and appear likely to avoid suppression by Scotch broom.

Comparison and Development of Height Growth and Site Index urves for Douglas-Fir in the Inland Northwest

1989 ◽  
Vol 4 (3) ◽  
pp. 85-88
Author(s):  
James L. Vander Ploeg ◽  
James A. Moore
Keyword(s):  
Pseudotsuga Menziesii ◽  
Model Development ◽  
Analysis Data ◽  
Site Index ◽  
Height Growth ◽  
Douglas Fir ◽  
Western Montana ◽  
Stem Analysis ◽  
Inland Northwest ◽  
Central Idaho

Abstract Stem analysis data from Douglas-fir (Pseudotsuga menziesii) collected throughout the inland Northwest were used for testing height growth and site index equations. The equations performed well in northern and central Idaho, northeast Oregon, and northeast Washington on vegetative types similar to those sampled in model development. However, if the equations were applied on drier sites outside the original geographic study area, overestimates of height growth and under-estimates of site index could result. Therefore, revised height growth and site index equations are presented for western Montana and central Washington. West. J. Appl. For. 4(3):85-88, July 1989.

HEIGHT GROWTH LOSSES DUE TO ANIMAL FEEDING IN DOUGLAS FIR PLANTATIONS, VANCOUVER ISLAND, B.C.

1964 ◽  
Vol 40 (3) ◽  
pp. 298-307 ◽  
Author(s):  
K. J. Mitchell
Keyword(s):  
Pseudotsuga Menziesii ◽  
East Coast ◽  
Growth Curves ◽  
Tree Height ◽  
Vancouver Island ◽  
Height Growth ◽  
Douglas Fir ◽  
Average Height ◽  
Animal Feeding ◽  
Rotation Age

Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) plantations on the east coast of Vancouver Island, British Columbia, were examined to determine the effect of animal feeding upon height growth.Length of internodes and evidence of past leader damage were recorded and cumulative average height-age growth curves compared for undamaged trees and for trees suffering various intensities of damage.The average reduction in tree height attributable to animal feeding in heavily browsed plantations varied from one-half to two feet over a period of 8 to 10 years. It is unlikely that either tree volume or quality at rotation age would be seriously affected.Exposed trees were browsed more heavily than those protected by vegetation or logging slash.

Genetic variation between and within two populations of Rhabdocline pseudotsugae in Germany

2016 ◽  
Vol 46 (5) ◽  
pp. 716-724 ◽  
Author(s):  
Kristin Morgenstern ◽  
Jens-Ulrich Polster ◽  
Doris Krabel
Keyword(s):  
Genetic Diversity ◽  
Genetic Variation ◽  
Spatial Distribution ◽  
Pseudotsuga Menziesii ◽  
Early Stage ◽  
Start Codon ◽  
Fruiting Bodies ◽  
Clear Differentiation ◽  
High Degree ◽  
Two Populations

Knowledge of the ecology and biology of Rhabdocline pseudotsugae Sydow is still at a very early stage. Recent results indicate the existence of an endophytic stage of the fungus in the form of symptomless infections in various Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) tissue types. This study represents the first description of genetic variation between and within two populations of R. pseudotsugae. Needles featuring fruiting bodies of R. pseudotsugae were collected from sample areas in Saxony and North Rhine-Westphalia (in Germany), with different fungal genotypes distinguished using the start codon targeted polymorphism (SCoT) and branch point signal sequences (BPS) techniques. Five of the 20 primers tested could be selected for further investigation. A total of 349 fragments were amplified at an average of 69.8 fragments per primer. Results showed the two sample areas to exhibit a high degree of both genetic variability and genetic diversity. A clear differentiation between the sample areas was not observed. There was nevertheless a clear connection between the genetic distance and spatial distribution of the fruiting bodies of R. pseudotsugae within the sample areas themselves.

Climate-related genetic variation in drought-resistance of Douglas-fir (Pseudotsuga menziesii)

2014 ◽  
Vol 21 (2) ◽  
pp. 947-958 ◽  
Author(s):  
Sheel Bansal ◽  
Constance A. Harrington ◽  
Peter J. Gould ◽  
J. Bradley St.Clair
Keyword(s):  
Genetic Variation ◽  
Pseudotsuga Menziesii ◽  
Drought Resistance ◽  
Douglas Fir

Genetic diversity and differentiation in populations of Japanese stone pine (Pinuspumila) in Japan

1996 ◽  
Vol 26 (8) ◽  
pp. 1454-1462 ◽  
Author(s):  
Naoki Tani ◽  
Nobuhiro Tomaru ◽  
Masayuki Araki ◽  
Kihachiro Ohba
Keyword(s):  
Genetic Diversity ◽  
Genetic Variation ◽  
Genetic Differentiation ◽  
Phylogenetic Trees ◽  
Genetic Relationships ◽  
Natural Populations ◽  
Group Method ◽  
Stone Pine ◽  
Arithmetic Means ◽  
Pair Group

Japanese stone pine (Pinuspumila Regel) is a dominant species characteristic of alpine zones of high mountains. Eighteen natural populations of P. pumila were studied in an effort to determine the extent and distribution of genetic diversity. The extent of genetic diversity within this species was high (HT = 0.271), and the genetic differentiation among populations was also high (GST = 0.170) compared with those of other conifers. In previous studies of P. pumila in Russia, the genetic variation within the species was also high, but the genetic differentiation among populations was low. We infer that this difference originates from differences in geographic distribution and ecological differences between the two countries. The genetic variation within each population tended, as a whole, to be smaller within marginal southern populations than within northern populations. Genetic relationships among populations reflect the geographic locations, as shown by unweighted pair-group method with arithmetic means and neighbor-joining phylogenetic trees.

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