scholarly journals Intrapopulation genetic variation in the level and rhythm of daily activity in Drosophila immigrans

2020 ◽  
Vol 10 (24) ◽  
pp. 14388-14393
Author(s):  
Takahisa Ueno ◽  
Yuma Takahashi
Keyword(s):  
Genetic Variation ◽  
Daily Activity ◽  
Intrapopulation Genetic Variation

scholarly journals The reasons for low intrapopulation genetic variation in Lamium incisum Willd

2011 ◽  
Vol 60 (1) ◽  
pp. 79-84
Author(s):  
Katarzyna Wąsowicz ◽  
Monika Szczecińska ◽  
Jakub Sawicki
Keyword(s):  
Genetic Variation ◽  
Genetic Variability ◽  
Diversity Index ◽  
Gene Diversity ◽  
Weed Species ◽  
Preliminary Screening ◽  
Low Genetic Diversity ◽  
The Mean ◽  
Intrapopulation Genetic Variation ◽  
Issr Primers

The reasons for low intrapopulation genetic variation in Lamium incisum Willd The paper presents results of a study which aim was preliminary screening of intrapopulation genetic variability in Lamium incisum Willd. This weed species is rarely distributed in Poland and lessening its count during the last years. As a plant inhabiting anthropogenic sites it is exposed to extreme conditions and disturbances caused mostly by the progressive intensification of agriculture. In order to investigate the genetic variability of the selected population markers of ISSR category were used. The analysis of chosen individuals with use of three ISSR primers revealed total of 49 loci, of which only 15 were polymorphic. Nei's gene diversity index (HE=0.099) and the mean number of alleles per locus (AE=1.160) indicated low genetic diversity within the examined population. The research presented in this paper allows for a better learning of the genetic variability of the investigated species and considers probable factors influencing its level.

scholarly journals Genetic variation in North American leafy spurge (Euphorbia esula) determined by DNA markers

Weed Science ◽  
1997 ◽  
Vol 45 (3) ◽  
pp. 446-454 ◽  
Author(s):  
Martha L. Rowe ◽  
Donald J. Lee ◽  
Scott J. Nissen ◽  
Brunella M. Bowditch ◽  
Robert A. Masters
Keyword(s):  
Genetic Variation ◽  
North American ◽  
Rapd Markers ◽  
Leafy Spurge ◽  
Euphorbia Esula ◽  
Range Of Movement ◽  
Multiple Introductions ◽  
Cpdna Markers ◽  
Intrapopulation Genetic Variation ◽  
High Degree

Levels of inter- and intrapopulation genetic variation were determined in five North American populations of leafy spurge using chloroplast DNA (cpDNA) RFLPs and RAPD markers. Thirteen plastome types were identified among 123 individuals collected from five geographically separated populations. Number of plastomes within a population ranged from one to seven, with four of the populations having a predominate type plus one or more rarer types. Some plastome types were shared by populations, but plastome distribution among populations was nonrandom. RAPD markers indicated greatest relatedness among individuals within a population. Relatedness among populations as established through RAPDs was greater for geographically closer populations; this relationship was not observed for cpDNA markers. Differences in the range of movement for pollen and seed may account for differences between results of the cpDNA and RAPD analyses. The high degree of genetic variability among North American leafy spurge suggests possible multiple introductions or a high degree of variability within leafy spurge populations in its native range.

scholarly journals Variation and genetic structure of Serratula lycopifolia populations (Vill.) Kern. (Asteraceae) in Poland and adjacent regions

2013 ◽  
Vol 81 (4) ◽  
pp. 67-75 ◽  
Author(s):  
Elżbieta Cieślak
Keyword(s):  
Genetic Variation ◽  
Genetic Similarity ◽  
Western Europe ◽  
Polish Population ◽  
Significant Differentiation ◽  
Low Genetic Diversity ◽  
Need Support ◽  
Support Programmes ◽  
Intrapopulation Genetic Variation ◽  
Number Of Individuals

AFLPs were used to analyze the genetic variability of <em>Serratula lycopifolia</em>, one of the rarest plant species in Central and Western Europe, in six populations from the Wyżyna Małopolska upland (Poland), White Carpathian Mts (Slovakia and Czech Republic) and Podolian Upland (Ukraine). The results of polymorphism, PCoA and neighbor-net analyzes showed similar and relatively low genetic variation and high genetic similarity of individuals within each Polish population but there were differences between those populations. The population from Slovakia also showed comparatively high intrapopulation homogeneity and evident genetic separation from the other studied populations. Intrapopulation genetic variation was higher in the Czech and Ukrainian populations. However, AMOVA analyses revealed no significant differentiation at population and regional levels. The estimated low genetic diversity in the populations from Poland and Slovakia may be due to genetic processes such as genetic drift and inbreeding in local populations resulting from their low abundance, and does not seem characteristic of the species as a whole. These genetic analyzes make it clear that the Polish and Slovakian populations need support programmes to maintain their genetic variation. Measures should focus on increasing the number of individuals in the populations and on protecting their habitat.

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