Genetic diversity and structure in Pinuspungens (Table Mountain pine) populations

1991 ◽  
Vol 21 (5) ◽  
pp. 635-642 ◽  
Author(s):  
J. P. Gibson ◽  
J. L. Hamrick
Keyword(s):  
Genetic Diversity ◽  
Conifer Species ◽  
Isolated Populations ◽  
Allozyme Diversity ◽  
Table Mountain ◽  
Mountain Pine ◽  
Genetic Diversity And Structure ◽  
Major Factors ◽  
Table Mountain Pine ◽  
High Degree

Pinuspungens Lamb. (Table Mountain pine) occurs in isolated populations from Georgia to Pennsylvania. Estimates were made of the levels of allozyme diversity within and among 20 populations of P. pungens from throughout its range. Pinuspungens has the high levels of genetic diversity typical of conifer species (0.242) and high intrapopulational diversity (0.204). However, P. pungens has twice as much of its diversity among populations (0.135) as the average conifer species. It is argued that the high degree of stand isolation and the opportunity for genetic drift to occur during succession are major factors contributing to the population genetic structure of this species.

Evaluating the dendroclimatological potential of central Appalachian Table Mountain pine (Pinus pungens LAMB.)

2010 ◽  
Vol 28 (3) ◽  
pp. 173-186 ◽  
Author(s):  
Georgina G. DeWeese ◽  
Henri D. Grissino-Mayer ◽  
Charles W. Lafon ◽  
Serena R. Aldrich
Keyword(s):  
Table Mountain ◽  
Mountain Pine ◽  
Table Mountain Pine

Fire and the origin of Table Mountain pine – pitch pine communities in the southern Appalachian Mountains, USA

2006 ◽  
Vol 36 (3) ◽  
pp. 710-718 ◽  
Author(s):  
Patrick H Brose ◽  
Thomas A Waldrop
Keyword(s):  
Fire Regime ◽  
Appalachian Mountains ◽  
Growth Patterns ◽  
Southern Appalachian Mountains ◽  
Southern Appalachian ◽  
Table Mountain ◽  
Mountain Pine ◽  
Pine Regeneration ◽  
Pitch Pine ◽  
Table Mountain Pine

The prevalence of stand-replacing fire in the formation of Table Mountain pine – pitch pine (Pinus pungens Lamb. and Pinus rigida Mill., respectively) communities was investigated with dendrochronological techniques. Nine stands in Georgia, South Carolina, and Tennessee were analyzed for age structure, species recruitment trends, and radial growth patterns to determine whether they had originated as a result of stand-replacing fires. The oldest pines date from the late 1700s or early 1800s. Continuous or frequent episodic pine regeneration from those times to the early to mid 1900s was evident at all sites. During the first half of the 20th century, all sites experienced large surges in pine regeneration. However, no clear evidence of stand-replacing wildfires could be definitively linked to these surges. Rather, the regeneration appeared to have been caused by noncatastrophic surface fires and canopy disturbances occurring together or by the cessation of a frequent fire regime. For the past 25–50 years, there has been little pine regeneration at any of the sites. Restoring the dual disturbance regime of periodic fires and canopy disturbances should help sustain Table Mountain pine – pitch pine communities in southern Appalachian Mountains landscapes.

scholarly journals Genetic Diversity and Structure of Pinus densiflora Siebold & Zucc. Populations in Republic of Korea Based on Microsatellite Markers

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 750
Author(s):  
Ji-Young Ahn ◽  
Jei-Wan Lee ◽  
Kyung-Nak Hong
Keyword(s):  
Genetic Diversity ◽  
Genetic Differentiation ◽  
Microsatellite Markers ◽  
Environmental Changes ◽  
Pinus Densiflora ◽  
Republic Of Korea ◽  
Conifer Species ◽  
Principal Coordinates ◽  
Genetic Diversity And Structure ◽  
The Republic

Pinus densiflora Siebold & Zucc. is a widely distributed conifer species in the Republic of Korea with economic and ecologic importance. However, P. densiflora is negatively influenced by various factors, such as forest fires, clearing of large numbers of trees infected with Pinus disease, and dieback. We aimed to use microsatellite markers to estimate the genetic diversity, differentiation, and structure of P. densiflora populations in the Republic of Korea. A total of 1844 samples from 60 populations were evaluated using 11 polymorphic microsatellite markers. The observed heterozygosity and expected heterozygosity were 0.652 and 0.673, respectively. The mean genetic differentiation among the populations was 0.013. Moreover, P. densiflora showed high genetic diversity and low genetic differentiation compared with conifer species, including Pinus species with similar life histories. Principal coordinates analysis and Bayesian clustering showed that P. densiflora has a weak geographical structure. The P. densiflora population at Mt. Halla, Jeju Island, showed the lowest genetic diversity and significant genetic differentiation compared with other mainland populations due to genetic drift and restricted gene flow. These findings can be useful for designing new conservation, management, and breeding strategies for P. densiflora populations in response to future environmental changes.

scholarly journals Genetic Diversity and Structure From Antillean Manatee (Trichechus manatus manatus) in the Southern Gulf of México: Comparison Between Connected and Isolated Populations

2018 ◽  
Vol 11 ◽  
pp. 194008291879556 ◽  
Author(s):  
Guadalupe Gómez-Carrasco ◽  
Julia María Lesher-Gordillo ◽  
León David Olivera-Gómez ◽  
Robert K Bonde ◽  
Stefan Arriaga-Weiss ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Gulf Of Mexico ◽  
Isolated Populations ◽  
Trichechus Manatus ◽  
Genetic Diversity And Structure ◽  
Southern Gulf Of Mexico
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