IEGEBA   24053
INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Spatial genetic structure and mitochondrial DNA phylogeography of Argentinean populations of the grasshopper Dichroplus elongatus.
Autor/es:
ROSETTI N Y REMIS MI
Revista:
PLOS ONE
Editorial:
PUBLIC LIBRARY SCIENCE
Referencias:
Lugar: San Francisco; Año: 2012 vol. 7 p. 1 - 20
ISSN:
1932-6203
Resumen:
Many grasshopper species are considered of agronomical importance because they cause damage to pastures and crops.
Comprehension of pest population dynamics requires a clear understanding of the genetic diversity and spatial structure of
populations. In this study we report on patterns of genetic variation in the South American grasshopper Dichroplus
elongatus which is an agricultural pest of crops and forage grasses of great economic significance in Argentina. We use
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
elongatus which is an agricultural pest of crops and forage grasses of great economic significance in Argentina. We use
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
elongatus which is an agricultural pest of crops and forage grasses of great economic significance in Argentina. We use
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
Dichroplus
elongatus which is an agricultural pest of crops and forage grasses of great economic significance in Argentina. We use
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.
which is an agricultural pest of crops and forage grasses of great economic significance in Argentina. We use
Direct Amplification of Minisatellite Regions (DAMD) and partial sequences of the cytochrome oxydase 1 (COI)
mitochondrial gene to investigate intraspecific structure, demographic history and gene flow patterns in twenty
Argentinean populations of this species belonging to different geographic and biogeographic regions. DAMD data suggest
that, although genetic drift and migration occur within and between populations, measurable relatedness among
neighbouring populations declines with distance and dispersal over distances greater than 200 km is not typical, whereas
effective gene flow may occur for populations separated by less than 100 km. Landscape analysis was useful to detect
genetic discontinuities associated with environmental heterogeneity reflecting the changing agroecosystem. The COI
results indicate the existence of strong genetic differentiation between two groups of populations located at both margins
of the Parana´ River which became separated during climate oscillations of the Middle Pleistocene, suggesting a significant
restriction in effective dispersion mediated by females and large scale geographic differentiation. The number of migrants
between populations estimated through mitochondrial and DAMD markers suggest that gene flow is low prompting a nonhomogeneous
spatial structure and justifying the variation through space. Moreover, the genetic analysis of both markers
allows us to conclude that males appear to disperse more than females, reducing the chance of the genetic loss associated
with recent anthropogenic fragmentation of the D. elongatus studied range.D. elongatus studied range.