Genetic diversity and mode of reproduction in French populations of the aphid Rhopalosiphum padi L.

J-C Simon; E Carrel; P D N Hebert; C A Dedryver; J Bonhomme; J-F Le Gallic

doi:10.1038/hdy.1996.44

Genetic diversity and mode of reproduction in French populations of the aphid Rhopalosiphum padi L.

Heredity ◽

10.1038/hdy.1996.44 ◽

1996 ◽

Vol 76 (3) ◽

pp. 305-313 ◽

Cited By ~ 42

Author(s):

J-C Simon ◽

E Carrel ◽

P D N Hebert ◽

C A Dedryver ◽

J Bonhomme ◽

...

Keyword(s):

Genetic Diversity ◽

Rhopalosiphum Padi ◽

Mode Of Reproduction

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The genome of an Encephalitozoon cuniculi type III strain reveals insights into the genetic diversity and mode of reproduction of a ubiquitous vertebrate pathogen

Heredity ◽

10.1038/hdy.2016.4 ◽

2016 ◽

Vol 116 (5) ◽

pp. 458-465 ◽

Cited By ~ 8

Author(s):

A Pelin ◽

H Moteshareie ◽

B Sak ◽

M Selman ◽

A Naor ◽

...

Keyword(s):

Genetic Diversity ◽

Encephalitozoon Cuniculi ◽

Mode Of Reproduction ◽

Type Iii

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Characterization of Ocimum tenuiflorum (Linn.) Morpho-types Using RAPD Markers

Notulae Scientia Biologicae ◽

10.15835/nsb11410590 ◽

2019 ◽

Vol 11 (4) ◽

pp. 417-420

Author(s):

James T. OPOOLA ◽

Matthew OZIEGBE

Keyword(s):

Genetic Diversity ◽

Genetic Variation ◽

Rapd Markers ◽

Clustering Algorithm ◽

Rapd Marker ◽

Purple Pigment ◽

Aromatic Plant ◽

Mode Of Reproduction ◽

Ocimum Tenuiflorum

Ocimum tenuiﬂorum Linn. (Lamiaceae) is an aromatic plant with a lot of potential medicinally, industrially and domestically. There are different morpho-types of O. tenuiflorum, with different shades of purple pigment on their leaves. Very few studies have been done to study the genetic variation among O. tenuiflorum morpho-types. Thus, in the present study, four O. tenuiflorum morpho-types that varied in pigmentation were characterised using RAPD marker as a molecular tool. Eight different primers collectively amplified 64 bands in the four morpho-types analysed. The RAPD technique revealed that the varied amount of purple pigment in O. tenuiflorum morpho-types is not due to environmental factor alone. The UPGMA clustering algorithm based on RAPD data grouped the four morpho-types into two major groups, with O. tenuiflorum (T2) with very light purple leaves and stem morpho-type, more related to O. tenuiflorum (T3) that have deep purple leaves and stem. The result was able to show the phylogenetic relationships within the species. The low level of genetic diversity observed in O. tenuiflorum can be attributed to the mode of reproduction and the reproductive biology of the species, due to the fact that they are likely to be natural hybrids produced through cross pollination.

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Genetic structure at national and regional scale in a long-distance dispersing pest organism, the bird cherry–oat aphid Rhopalosiphum padi

10.1101/829986 ◽

2019 ◽

Cited By ~ 1

Author(s):

Ramiro Morales-Hojas ◽

Asier Gonzalez-Uriarte ◽

Fernando Alvira Iraizoz ◽

Todd Jenkins ◽

Lynda Alderson ◽

...

Keyword(s):

Genetic Diversity ◽

Gene Flow ◽

Great Britain ◽

Genetic Structure ◽

Environmental Change ◽

Isolation By Distance ◽

Rhopalosiphum Padi ◽

Regional Scale ◽

Pest Species ◽

Long Distance

AbstractGenetic diversity is determinant for pest species’ success and vector competence. Understanding the ecological and evolutionary processes that determine the genetic diversity is fundamental to help identify the spatial scale at which pest populations are best managed. In the present study, we present the first comprehensive analysis of the genetic diversity and evolution of Rhopalosiphum padi, a major pest of cereals and a main vector of the barley yellow dwarf virus (BYDV), in Great Britain. We have used a genotype by sequencing approach to study whether i) there is any underlying population genetic structure in this long distant disperser pest at a national and regional scale; ii) the populations evolve as a response to environmental change and selective pressures, and; iii) the populations comprise anholocyclic lineages. Individual R. padi were collected using the Rothamsted Insect Survey’s suction-trap network at several sites across England between 2004 and 2016 as part of the RIS long-term nationwide surveillance. Results identified two genetic clusters in Great Britain that mostly paralleled a North – South division, although gene flow is ongoing between the two subpopulations. These different groups do not correspond to sexual and asexual types, sexual reproduction being predominant in Great Britain, and could correspond to ecotypes. Results also show that there is migration with gene flow across Great Britain, although there is a reduction between the northern and southern sites with the Southwestern population being the most genetically differentiated. There is no evidence for isolation-by-distance and other factors like primary host distribution could influence the migration patterns. Finally, results also show no evidence for the evolution of the R. padi population, and it is demographically stable despite the ongoing environmental change. These results are discussed in view of their relevance to pest management and the transmission of BYDV.

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