scholarly journals Colonization history and human translocations explain the population genetic structure of the noble crayfish ( Astacus astacus ) in Fennoscandia: Implications for the management of a critically endangered species

2021 ◽  
Author(s):  
Johan Dannewitz ◽  
Stefan Palm ◽  
Lennart Edsman
Keyword(s):  
Genetic Structure ◽  
Endangered Species ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Critically Endangered ◽  
Astacus Astacus ◽  
Colonization History ◽  
Critically Endangered Species ◽  
Noble Crayfish

scholarly journals Genetic Diversity and Population Genetic Structure of Erythrophleum fordii Oliv., an Endangered Rosewood Species in South China

Forests ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 636 ◽  
Author(s):  
Jing Tan ◽  
Zhi-Gang Zhao ◽  
Jun-Jie Guo ◽  
Chun-Sheng Wang ◽  
Jie Zeng
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Endangered Species ◽  
Genetic Differentiation ◽  
South China ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
The Mean ◽  
Erythrophleum Fordii ◽  
Private Alleles

Erythrophleum fordii Oliv. is a valuable rosewood species indigenous to the tropical and warm sub-tropical zones of Vietnam, Laos, and South China. The natural forests have been heavily fragmented mostly due to over-exploitation and over-utilization, and alteration to croplands and fast-growing plantations. Therefore, it has been included in the IUCN Red List of Endangered Species as an endangered species. In the present study, genetic diversity and population genetic structure of 11 populations were estimated by SSR makers in South China. Five high polymorphic loci were studied with a total of 34 alleles, among which, seven were private alleles. The mean number of alleles per locus (A), the mean number of efficient alleles per locus (Ae), the observed (Ho) and expected (He) heterozygosity, and Shannon’s index (I) of the 11 populations were 3.40, 2.31, 0.52, 0.56, and 0.90, respectively. Correlation analysis between genetic parameters and geographical factors showed that He and I were in significant negative correlation with longitude, indicating that genetic diversity of E. fordii reduced gradually from West to East in south China. FIS of eight populations with above five samples was on average 0.01, most loci conformed to Hardy-Weinberg equilibrium in these populations; their genetic differentiation coefficient (FST) was 0.18, indicating that genetic differentiation among populations was relatively low and there existed 18% genetic variation among populations. Gene flow (Nm) between these populations was 1.28. The Mantel test showed that genetic distance was not significantly correlated with geographical distance (p > 0.05). It was concluded that populations with high genetic diversity or private alleles, especially Longmen, Wuming and Pingxiang populations should be a priority for in situ conservations, meanwhile more populations and as many families as possible in each population should be collected for ex situ conservations of germplasm resources of this species in the future.

scholarly journals Genetic structure of Xiuning population of Isoetes sinensis， a critically endangered species in China

2004 ◽  
Vol 12 (6) ◽  
pp. 564-571
Author(s):  
Ye Qigang ◽  
CHEN Yuan-Yuan ◽  
Zuozhou Li ◽  
Hongwen Huang ◽  
Keyword(s):  
Genetic Structure ◽  
Endangered Species ◽  
Critically Endangered ◽  
Critically Endangered Species

Population genetic structure and genetic diversity of three critically endangered Pristis sawfishes in Australian waters

2011 ◽  
Vol 158 (4) ◽  
pp. 903-915 ◽  
Author(s):  
Nicole M. Phillips ◽  
Jennifer A. Chaplin ◽  
David L. Morgan ◽  
Stirling C. Peverell
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Critically Endangered
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