Indirect Methods to Estimate Gene Flow in Cave and Surface Populations of Androniscus dentiger (Isopoda: Oniscidea)

Evolution ◽  
1998 ◽  
Vol 52 (2) ◽  
pp. 432 ◽  
Author(s):  
Gabriele Gentile ◽  
Valerio Sbordoni
Keyword(s):  
Gene Flow ◽  
Indirect Methods ◽  
Estimate Gene Flow

scholarly journals Linked vs. unlinked markers: multilocus microsatellite haplotype-sharing as a tool to estimate gene flow and introgression

2006 ◽  
Vol 16 (2) ◽  
pp. 243-256 ◽  
Author(s):  
WIM J. M. KOOPMAN ◽  
YINGHUI LI ◽  
ELS COART ◽  
W. ERIC VAN DE WEG ◽  
BEN VOSMAN ◽  
...  
Keyword(s):  
Gene Flow ◽  
Haplotype Sharing ◽  
Microsatellite Haplotype ◽  
Estimate Gene Flow

Construction of three-year genetic profile of Japanese wild boars in Wakayama prefecture, to estimate gene flow from crossbred Inobuta into wild boar populations

Mammal Study ◽  
2008 ◽  
Vol 33 (2) ◽  
pp. 43-49 ◽  
Author(s):  
Naotaka Ishiguro ◽  
Yasuo Inoshima ◽  
Kazuo Suzuki ◽  
Tatsuya Miyoshi ◽  
Tomoyuki Tanaka
Keyword(s):  
Gene Flow ◽  
Wild Boar ◽  
Genetic Profile ◽  
Wild Boars ◽  
Estimate Gene Flow

scholarly journals Gene flow despite complex Robertsonian fusions among rock-wallaby ( Petrogale ) species

2015 ◽  
Vol 11 (10) ◽  
pp. 20150731 ◽  
Author(s):  
Sally Potter ◽  
Craig Moritz ◽  
Mark D. B. Eldridge
Keyword(s):  
Gene Flow ◽  
Chromosome Change ◽  
Chromosomal Speciation ◽  
Robertsonian Rearrangements ◽  
Robertsonian Fusions ◽  
Estimate Gene Flow

Complex Robertsonian rearrangements, with shared arms in different fusions, are expected to prevent gene flow between hybrids through missegregation during meiosis. Here, we estimate gene flow between recently diverged and chromosomally diverse rock-wallabies ( Petrogale ) to test for this form of chromosomal speciation. Contrary to expectations, we observe relatively high admixture among species with complex fusions. Our results reinforce the need to consider alternative roles of chromosome change, together with genic divergence, in driving speciation.

scholarly journals Estimates of gene flow among populations, geographic races, and species in the Ipomopsis aggregata complex.

Genetics ◽  
1992 ◽  
Vol 130 (3) ◽  
pp. 639-647
Author(s):  
P G Wolf ◽  
P S Soltis
Keyword(s):  
Gene Flow ◽  
Genetic Exchange ◽  
Morphological Evidence ◽  
Ipomopsis Aggregata ◽  
Allozyme Data ◽  
Interspecific Gene Flow ◽  
Geographic Race ◽  
Perennial Herbs ◽  
Estimate Gene Flow ◽  
F Statistics

Abstract Interpopulational gene flow within a species can reduce population differentiation due to genetic drift, whereas genetic exchange among taxa can impede speciation. We used allozyme data to estimate gene flow within and among geographic races and species of perennial herbs in the Ipomopsis aggregata complex (Polemoniaceae). Estimates of interpopulational gene flow within taxa from two methods (F statistics and private alleles) were correlated with one another. Gene flow among populations within each geographic race (subspecies) of I. aggregata was relatively high (Nm greater than approximately 1.0). Gene flow was also high among populations of I. arizonica and among four northern populations of I. tenuituba. However, gene flow was low (Nm less than 1.0) for I. tenuituba when a population representing subsp. macrosiphon was included. This is consistent with previous findings that subsp. macrosiphon has had an independent origin and is reproductively, as well as geographically, isolated. A recently developed model, based on hierarchical F statistics, was employed to estimate genetic exchange among taxa. Gene flow estimates were generally high among races of I. aggregata (dNmrace greater than 1.0) but were low among subspecies of I. tenuituba (dNmrace less than 1.0). Consistent with morphological evidence, estimates of interspecific gene flow were moderate between I. aggregata and I. tenuituba, which hybridize in several areas. However, contrary to morphological evidence, we estimated relatively high levels of interspecific gene flow involving I. arizonica. Our results suggest that I. arizonica has hybridized with other species without the transfer of morphological traits.(ABSTRACT TRUNCATED AT 250 WORDS)

scholarly journals Population history and the differential consequences of inbreeding and outcrossing in a plant metapoplation

2020 ◽  
Author(s):  
Peter D. Fields ◽  
Gretchen Arnold ◽  
Joel M. Kniskern ◽  
Douglas R. Taylor
Keyword(s):  
Gene Flow ◽  
Population Size ◽  
Empirical Studies ◽  
Genetic Load ◽  
Population History ◽  
Silene Latifolia ◽  
Population Genetic Analysis ◽  
Crossing Experiment ◽  
Estimate Gene Flow ◽  
Historical Variation

ABSTRACTThe phenotypic consequences of inbreeding typically result in a fitness decline proportional to the increase in the inbreeding coefficient, F. This basic assumption of a predictable, inverse relationship between fitness and F has been questioned by a number of empirical studies. We explored the relationship between population history and inbreeding in a metapopulation of the plant Silene latifolia, for which long-term data are available for the historical size and spatial distribution of hundreds of local demes. We used a population genetic analysis to estimate gene flow and bi-parental inbreeding (FIS) in demes with different histories of spatial isolation. A controlled crossing experiment examined whether the effect of inbreeding and outcrossing on fitness-related traits varied with different histories of population size and isolation. Historically isolated demes experienced less gene flow and an increase in FIS, as well as significant inbreeding advantage and outbreeding depression for traits expressed early in life. The causes of variation in the F-fitness relationship among populations will include variance in the distribution of deleterious recessive alleles driven by aspects of population history, including population size, founder effects, gene flow, bi-parental inbreeding, and opportunities for the purging of genetic load. Our findings show that isolation and historical variation in population size likely contribute substantial variation in past inbreeding and the consequences of future inbreeding across the metapopulation.

A comparison of two indirect methods for estimating average levels of gene flow using microsatellite data

1999 ◽  
Vol 8 (9) ◽  
pp. 1513-1520 ◽  
Author(s):  
O. E. Gaggiotti ◽  
O. Lange ◽  
K. Rassmann ◽  
C. Gliddon
Keyword(s):  
Gene Flow ◽  
Microsatellite Data ◽  
Indirect Methods
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