Population structure of an endemic vulnerable species, the Jamaican boa (<i>Epicrates subflavus</i>)

Tzika, Athanasia C.; Koenig, Susan E.; Miller, Ricardo R.; García, Gerardo; Remy, Christophe; Milinkovitch, Michel C.

doi:10.1111/j.1365-294x.2007.03588.x

Cited by 30 publications

(26 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, five loci showed values lower than 0.7 indicating recent size reduction, while only one loci (GCPM_354) was even lower, lower than 0.43, which indicates significant population decline in the past (Garza & Williamson, 2001;Tzika et al, 2008). The mean value of G-W index was confirmed with alleles shifted mode distribution, confirming existence of recent size reduction within studied population.…”

Section: Viability Assessmentsupporting

confidence: 59%

Viability and genetic diversity of Populus nigra population from riparian forest in SNR Gornje Podunavlje

Čortan¹,

Tubić²

2017

Dendrobiology

View full text Add to dashboard Cite

Populus nigra L. is one of the rarest and most endangered tree species in Western and Central Europe. Its genetic diversity is of great importance in enabling a native riparian population to survive and reproduce under changing environmental conditions. The aim of this research was assessment of P. nigra viability in one of the best preserved riparian ecosystems in Europe, Special Nature Reserve "Gornje Podunavlje" (Upper Danube), Serbia. Additionally, the analysis of the genetic diversity was made to support the effective conservation in the future. During our study, we have mapped 931 P. nigra trees, which were used for the assessment of present native population. Furthermore, we used 14 microsatellite markers to assess the genetic structure of this this population. Viability assessment showed considerable occurrence of P. nigra in the research area, even though the results show fragmentation. P. nigra occurs mostly individually or in small groups of trees, and has a non-sustainable age structure due to insufficient or lacking regeneration. Despite the limited size of the studied population, the apparent overall genetic diversity was high (He = 0.759) and comparable to other known native populations of P. nigra along the Danube basin. However, the results also confirmed existence of recent bottleneck effect. Significantly positive and quite high F is value (0.147) was noted, which may be ascribed to the "Wahlund effect" because of the population substructure that was revealed by the STRUC-TURE analysis (K=2). Although results say that coverage of native stands is not so promising, most of selected trees within our research assessed showed good viability with potential for natural reproduction However, the problem is that suitable areas for natural seedling establishment are scarce and with that gene flow is probably limited. The fragmentation of the area must be reduced and isolated stands must be interlinked as there is need to create larger non-fragmented areas.

show abstract

Section: Viability Assessmentsupporting

confidence: 59%

Viability and genetic diversity of Populus nigra population from riparian forest in SNR Gornje Podunavlje

Čortan¹,

Tubić²

2017

Dendrobiology

View full text Add to dashboard Cite

show abstract

“…DNA was unavailable for the 2004 male and his offspring. Samples were screened and genotyped at five microsatellite loci (table 1) newly developed for B. c. imperator following the method outlined by Booth et al [17], and at three additional loci developed by Tzika et al [18]. …”

Section: Methodsmentioning

confidence: 99%

Evidence for viable, non-clonal but fatherless Boa constrictors

Booth

Johnson²,

Moore³

et al. 2010

Biol. Lett.

View full text Add to dashboard Cite

Parthenogenesis in vertebrates is considered an evolutionary novelty. In snakes, all of which exhibit genetic sex determination with ZZ : ZW sex chromosomes, this rare form of asexual reproduction has failed to yield viable female WW offspring. Only through complex experimental manipulations have WW females been produced, and only in fish and amphibians. Through microsatellite DNA fingerprinting, we provide the first evidence of facultative parthenogenesis in a Boa constrictor, identifying multiple, viable, nonexperimentally induced females for the first time in any vertebrate lineage. Although the elevated homozygosity of the offspring in relation to the mother suggests that the mechanism responsible may be terminal fusion automixis, no males were produced, potentially indicating maternal sex chromosome hemizygosity (WO). These findings provide the first evidence of parthenogenesis in the family Boidae (Boas), and suggest that WW females may be more common within basal reptilian lineages than previously assumed.

show abstract

“…Most of wildlife including mammals, birds, amphibians, reptiles, and so on is considered to be endangered or threatened because of illegal hunting, oriental medicine, habitat destruction. Especially, natural population of snakes in reptiles constantly declined, mainly because of predation by introduced species, human persecution, and habitat destruction (Tzika et al, 2008). A comprehensive assessment of population structure is one critical component for their effective conservation.…”

Section: Resultsmentioning

confidence: 99%

“…Within the species, genetic differentiation on the basis of F ST value could be identified. Tzika et al (2008) reported that the F ST value of three populations for jamaican boa (Epicrates subflavus) was 0.093 (P⁄0.001). Among 5 populations of timber rattlesnake (Crotalus horridus), F ST values were ranged from 0.000 to 0.005 (Clark et (Park, 2010).…”

Section: Resultsmentioning

confidence: 99%

“…Microsatellite markers are available for evaluating the extent of genetic variation. And also these markers have been extensively used to investigate genetic diversity and population structure in snakes (Manier and Arnold, 2005;Clark et al, 2008;Tzika et al, 2008). Several literatures cover the assessment of genetic diversity and differences among subspecies in various taxa using microsatellites (elk-Meredith et al, 2007;mosquitoe-Kothra et al, 2009;massasauga rattlesnakeMurphy, 2009).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

No Genetic Differentiation of Elaphe schrenckii Subspecies in Korea Based on 9 Microsatellite Loci

An¹,

Park²,

Lee³

et al. 2010

Animal Systematics, Evolution and Diversity

View full text Add to dashboard Cite

The Russian ratsnake, Elaphe schrenckii, is found in Russia, China, and Korea, and is considered to be an endangered species by the Ministry of Environment in South Korea. Due to habitat loss and use in oriental medicine, their population has been severely decimated. In South Korea, two subspecies of E. schrenckii has been defined according to body color: E. s. schrenckii (blackish) and E. s. anomala (yellow-brownish). Molecular genetic studies on Elaphe schrenckii are very scarce and the taxonomy of Elaphe schrenckii subspecies is uncertain. From the present study, we attempted to identify the genetic differences of these two subspecies using species-specific microsatellites developed from the genomic library of E. schrenckii. Nine polymorphic loci were tested on 19 individuals from E. s. schrenckii (n= =10) and E. s. anomala (n= =9) in South Korea. The mean number of alleles was 3.78 in E. s. schrenckii and 4.11 in E. s. anomala. The average expected heterozygosity was 0.542 and 0.511 in E. s. schrenckii and E. s. anomala, respectively. We found a lack of genetic structure between two subspecies (F ST = =0.016) and no genetic discrimination between two subspecies was found. Based on the present findings by microsatellites, two subspecies can be considered as one species, E. schrenckii. However, further investigations on taxonomical status using mitochondrial and nuclear DNA sequences need to be performed and morphological & ecological data should be revised. The genetic markers should benefit future studies of the endangered species of other Elaphe species for the study of genetic diversity and potential conservation management.

show abstract

Population structure of an endemic vulnerable species, the Jamaican boa (Epicrates subflavus)

Cited by 30 publications

References 51 publications

Viability and genetic diversity of Populus nigra population from riparian forest in SNR Gornje Podunavlje

Viability and genetic diversity of Populus nigra population from riparian forest in SNR Gornje Podunavlje

Evidence for viable, non-clonal but fatherless Boa constrictors

No Genetic Differentiation of Elaphe schrenckii Subspecies in Korea Based on 9 Microsatellite Loci

Contact Info

Product

Resources

About