scholarly journals Factors influencing the genetic structure of Phacelia dubia, a species with a seed bank and large fluctuations in population size

Heredity ◽  
1994 ◽  
Vol 72 (5) ◽  
pp. 446-458 ◽  
Author(s):  
Rafael F del Castillo
Keyword(s):  
Genetic Structure ◽  
Population Size ◽  
Seed Bank ◽  
Factors Influencing ◽  
Large Fluctuations

scholarly journals Low effective population size and high spatial genetic structure of black poplar populations from the Oder valley in Poland

2021 ◽  
Vol 78 (2) ◽  
Author(s):  
Błażej Wójkiewicz ◽  
Andrzewj Lewandowski ◽  
Weronika B. Żukowska ◽  
Monika Litkowiec ◽  
Witold Wachowiak
Keyword(s):  
Genetic Structure ◽  
Genetic Resources ◽  
Population Size ◽  
Effective Population Size ◽  
Spatial Genetic Structure ◽  
Demographic History ◽  
River Valley ◽  
Ex Situ ◽  
Effective Population ◽  
Black Poplar

Abstract Context Black poplar (Populus nigra L.) is a keystone species of European riparian ecosystems that has been negatively impacted by riverside urbanization for centuries. Consequently, it has become an endangered tree species in many European countries. The establishment of a suitable rescue plan of the remaining black poplar forest stands requires a preliminary knowledge about the distribution of genetic variation among species populations. However, for some parts of the P. nigra distribution in Europe, the genetic resources and demographic history remain poorly recognized. Aims Here, we present the first study on identifying and characterizing the genetic resources of black poplar from the Oder valley in Poland. This study (1) assessed the genetic variability and effective population size of populations and (2) examined whether gene flow is limited by distance or there is a single migrant pool along the studied river system. Methods A total of 582 poplar trees derived from nine black poplar populations were investigated with nuclear microsatellite markers. Results (1) The allelic richness and heterozygosity level were high and comparable between populations. (2) The genetic structure of the studied poplar stands was not homogenous. (3) The signatures of past bottlenecks were detected. Conclusion Our study (1) provides evidence for genetic substructuring of natural black poplar populations from the studied river catchment, which is not a frequent phenomenon reported for this species in Europe, and (2) indicates which poplar stands may serve as new genetic conservation units (GCUs) of this species in Europe. Key message The genetic resources of black poplar in the Oder River valley are still substantial compared to those reported for rivers in Western Europe. On the other hand, clear signals of isolation by distance and genetic erosion reflected in small effective population sizes and high spatial genetic structure of the analyzed populations were detected. Based on these findings, we recommend the in situ and ex situ conservation strategies for conserving and restoring the genetic resources of black poplar populations in this strongly transformed by human river valley ecosystem.

Effective population size and genetic structure of a Piute ground squirrel (Spermophilus mollis) population

2001 ◽  
Vol 79 (1) ◽  
pp. 26-34 ◽  
Author(s):  
Michael F. Antolin ◽  
Beatrice Van Horne ◽  
Michael D. Berger, Jr. ◽  
Alisha K. Holloway ◽  
Jennifer L. Roach ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Population Size ◽  
Effective Population Size ◽  
Ground Squirrel ◽  
Effective Population

scholarly journals A LIFE-HISTORY BASED STUDY OF POPULATION GENETIC STRUCTURE: SEED BANK TO ADULTS IN PLANTAGO LANCEOLATA

Evolution ◽  
1993 ◽  
Vol 47 (3) ◽  
pp. 833-843 ◽  
Author(s):  
Stephen J. Tonsor ◽  
Susan Kalisz ◽  
Jill Fisher ◽  
Timothy P. Holtsford
Keyword(s):  
Life History ◽  
Genetic Structure ◽  
Seed Bank ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Plantago Lanceolata

scholarly journals Mealybug species from Chilean agricultural landscapes and main factors influencing the genetic structure of Pseudococcus viburni

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Margarita C. G. Correa ◽  
Eric Lombaert ◽  
Thibaut Malausa ◽  
Didier Crochard ◽  
Andrés Alvear ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Agricultural Landscapes ◽  
Factors Influencing ◽  
Main Factors ◽  
Pseudococcus Viburni
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