Reproductive ecology and genetic variability in natural populations of the wild potato,Solanum kurtzianum

Plant Biology ◽  
2013 ◽  
Vol 16 (2) ◽  
pp. 485-494 ◽  
Author(s):  
C. F. Marfil ◽  
R. W. Masuelli
Keyword(s):  
Genetic Variability ◽  
Reproductive Ecology ◽  
Natural Populations ◽  
Wild Potato ◽  
Solanum Kurtzianum

scholarly journals Differentiation and genetic variability in natural populations of Anopheles (N.) triannulatus (Neiva& Pinto, 1922) of Brazilian Amazonia

2004 ◽  
Vol 64 (2) ◽  
pp. 327-336 ◽  
Author(s):  
J. M. M. Santos ◽  
J. F. Maia ◽  
W. P. Tadei
Keyword(s):  
Genetic Variability ◽  
Natural Populations ◽  
Isozyme Analysis ◽  
Brazilian Amazonia ◽  
F Statistics

Populations of Anopheles triannulatus from Macapá (AP), Aripuanã (MT), Ji-Paraná (RO), and Manaus-Janauari Lake (AM) were studied using 16 enzymatic loci. The results of the isozyme analysis showed that the population of Macapá presented higher polymorphism (56.3%). The lowest variability was observed in the population of Manaus (p = 25.0; Ho = 0.077 ± 0.046). The results of Wright's F statistics showed unbalance due to excess of homozygotes (Fis > Fst), denoting a certain intrapopulational differentiation. Although the populations are genetically very close (D = 0.003 - 0.052), the dendrogram separates the populations in two groups: Macapá separated from that of Manaus, Ji-Paraná, and Aripuanã. This result may suggest a reduction in the genic flow, which possibly had some influence in the substructuration of the populations.

scholarly journals Genetic variability of brycon orbignyanus (valenciennes, 1850) (characiformes: characidae) in cultivated and natural populations of the upper paraná river, and implications for the conservation of the species

2011 ◽  
Vol 54 (4) ◽  
pp. 839-848 ◽  
Author(s):  
Renata de Souza Panarari-Antunes ◽  
Alberto José Prioli ◽  
Sônia Maria Alves Pinto Prioli ◽  
Alexsandro Sobreira Galdino ◽  
Horácio Ferreira Julio Junior ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Natural Populations ◽  
Paraná River ◽  
Parana River ◽  
Upper Paraná River

Genetic variability in the natural populations of Lasioderma serricorne (F.) (Coleoptera: Anobiidae), detected by RAPD markers and by esterase isozymes

2015 ◽  
Vol 106 (1) ◽  
pp. 47-53 ◽  
Author(s):  
T. Coelho-Bortolo ◽  
C.A. Mangolin ◽  
A.S. Lapenta
Keyword(s):  
Genetic Variability ◽  
Random Amplified Polymorphic Dna ◽  
Natural Populations ◽  
Electrophoretic Analysis ◽  
Effective Control ◽  
Lasioderma Serricorne ◽  
Control Programs ◽  
Dried Fruit ◽  
High Level ◽  
High Degree

AbstractLasioderma serricorne (F.) is a small cosmopolitan beetle regarded as a destructive pest of several stored products such as grains, flour, spices, dried fruit and tobacco. Chemical insecticides are one of the measures used against the pest. However, intensive insecticide use has resulted in the appearance of resistant insect populations. Therefore, for the elaboration of more effective control programs, it is necessary to know the biological aspects of L. serricorne. Among these aspects, the genetic variability knowledge is very important and may help in the development of new control methods. The objective of this study was to evaluate the genetic variability of 11 natural populations of L. serricorne collected respectively in three and four towns in the states of Paraná and São Paulo, Brazil, using 20 primers random amplified polymorphic DNA (RAPD) and polymorphisms of esterases. These primers produced 352 polymorphic bands. Electrophoretic analysis of esterases allowed the identification of four polymorphic loci (Est-2, Est-4, Est-5 and Est-6) and 18 alleles. Results show that populations are genetically differentiated and there is a high level of genetic variability within populations. The high degree of genetic differentiation is not directly correlated to geographical distance. Thus, our data indicate that movement of infested commodities may contribute to the dissemination of L. serricorne, facilitating gene flow.

scholarly journals Genetic structure and gene flow of Eugenia dysenterica natural populations

2005 ◽  
Vol 40 (10) ◽  
pp. 975-980 ◽  
Author(s):  
Maria Imaculada Zucchi ◽  
José Baldin Pinheiro ◽  
Lázaro José Chaves ◽  
Alexandre Siqueira Guedes Coelho ◽  
Mansuêmia Alves Couto ◽  
...  
Keyword(s):  
Gene Flow ◽  
Genetic Variability ◽  
Pearson Correlation ◽  
Natural Populations ◽  
Similarity Index ◽  
Genetic Distances ◽  
Strong Positive Correlation ◽  
Randomly Amplified Polymorphic Dna ◽  
Jaccard Similarity ◽  
Eugenia Dysenterica

This study was carried out to assess the genetic variability of ten "cagaita" tree (Eugenia dysenterica) populations in Southeastern Goiás. Fifty-four randomly amplified polymorphic DNA (RAPD) loci were used to characterize the population genetic variability, using the analysis of molecular variance (AMOVA). A phiST value of 0.2703 was obtained, showing that 27.03% and 72.97% of the genetic variability is present among and within populations, respectively. The Pearson correlation coefficient (r) among the genetic distances matrix (1 - Jaccard similarity index) and the geographic distances were estimated, and a strong positive correlation was detected. Results suggest that these populations are differentiating through a stochastic process, with restricted and geographic distribution dependent gene flow.

scholarly journals Analysis of intraspecific polymorphism of Nitraria sibirica Pall. using the ISSR technique

2021 ◽  
Vol 38 ◽  
pp. 00054
Author(s):  
Sofia A. Khozyaykina ◽  
Evgeny V. Banaev
Keyword(s):  
Genetic Variability ◽  
Genetic Distance ◽  
Dna Polymorphism ◽  
Natural Populations ◽  
Dna Amplification ◽  
Issr Marker ◽  
Intraspecific Polymorphism ◽  
Nitraria Sibirica ◽  
The Republic ◽  
Issr Primers

The analysis of DNA polymorphism of Nitraria sibirica Pall. was carried out at 13 natural populations of the Republic of Altai and Altai Territory using the ISSR technique. Seven effective ISSR primers have been identified to analyze DNA polymorphism in N. sibirica. 99 DNA fragments were yielded at DNA amplification with these primers, 66 of them were polymorphic. The genetic distance Nei (D) between the studied populations of N. sibirica averaged 0.32, at mean 0.09 - within populations. An identification ISSR marker has been revealed, which can be used to study the genetic variability of the genus Nitraria L. (Nitrariaceae) species.

scholarly journals Genetic variability in natural populations of Zeyheria montana mart. from the Brazilian Cerrado

2007 ◽  
Vol 64 (4) ◽  
pp. 409-415 ◽  
Author(s):  
Bianca Waléria Bertoni ◽  
Spartaco Astolfi Filho ◽  
Ernani Ronie Martins ◽  
Carlos Ferreira Damião Filho ◽  
Suzelei de Castro França ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Natural Populations ◽  
Mantel Test ◽  
Scientific Data ◽  
Group Method ◽  
Polymorphism Analysis ◽  
Popular Medicine ◽  
Pair Group ◽  
Optimized Protocol ◽  
Geographical Distances

Zeyheria montana, an endemic species of the Bignoniaceae family from the Brazilian Cerrado's known for its anti-cancer properties, is widely used as imuno stimulant in the popular medicine and its therapeutic activity must be validated by scientific data. The objective of this work was to evaluate the genetic variability of eight plant populations collected within the state of São Paulo, Brazil, via Random Amplification of Polymorphic DNA (RAPD) used as molecular markers. After an optimized protocol for the amplification reaction, nine selected primers generated 105 reproducible bands, indicating up to 60% polymorphism. Analysis of molecular variance (AMOVA) revealed higher genetic variation within populations (84.03%) than among populations (15.97%). The variation values estimated by phiST (0.160) indicated moderate to high inter population structuration. Levels of similarity inter plants with genetic and geographical distances, estimated by the unweighted pair-group method analysis (UPGMA) clustering and non-metric multidimensional scaling (NMDS) ordination methods and by the Mantel test (-0.2345 p = 0.118) denoted that the structure found follows the island model, which assumes that a single population of infinite size may have initiated the existing populations of Zeyheria montana, with no spatial position correlation. Based on the obtained data, a germplasm bank from individuals representing the species variability was established. Furthermore the information here reported can be of importance to develop strategies for the conservation of Z. montana.

Genetic Variability in Natural Populations of Softchess (Bromus mollis L.)

Evolution ◽  
1970 ◽  
Vol 24 (4) ◽  
pp. 649 ◽  
Author(s):  
S. K. Jain ◽  
D. R. Marshall ◽  
K. Wu
Keyword(s):  
Genetic Variability ◽  
Natural Populations ◽  
Bromus Mollis

scholarly journals GENETIC VARIABILITY IN NATURAL POPULATIONS OF SOFTCHESS (BROMUS MOLLISL.)

Evolution ◽  
1970 ◽  
Vol 24 (4) ◽  
pp. 649-659 ◽  
Author(s):  
S. K. Jain ◽  
D. R. Marshall ◽  
K. Wu
Keyword(s):  
Genetic Variability ◽  
Natural Populations
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