scholarly journals The morphological variation of Myzus persicae (Hemiptera: Aphididae) from peach and tobacco in Serbia and Montenegro

2010 ◽  
Vol 62 (3) ◽  
pp. 767-774 ◽  
Author(s):  
Andja Vucetic ◽  
Olivera Petrovic-Obradovic ◽  
Lj.Z. Stanisavljevic
Keyword(s):  
Discriminant Analysis ◽  
Morphometric Analysis ◽  
Morphological Variation ◽  
Myzus Persicae ◽  
Host Plants ◽  
Segment Length ◽  
Serbia And Montenegro

Multivariate morphometric analysis was used to compare nine characteristics of 47 populations of Myzus persicae (Sulzer) originating from two host-plants, peach and tobacco, from 13 localities in 2004 and 34 localities in 2005, in Serbia and Montenegro. Multivariant discriminant analysis showed there to be a distinct discrimination between the populations from the peach and tobacco host-plants. The most important discrimination characteristics are the ultimate rostral segment length and processes terminalis length, which are greater in the aphids from tobacco than in those from peach. This is the first indication that in this part of Europe there are two subspecies: M. persicae (Sulzer) and M. persicae nicotianae Blackman. .

scholarly journals Morphometric analysis of nectaries and their potential use in the taxonomy of the Jovibarba heuffelii complex (Crassulaceae)

2015 ◽  
Vol 67 (2) ◽  
pp. 511-524
Author(s):  
Danijela Nikolic ◽  
Milica Spasic ◽  
Jasmina Sinzar-Sekulic ◽  
Vladimir Randjelovic ◽  
Dmitar Lakusic
Keyword(s):  
Discriminant Analysis ◽  
Morphometric Analysis ◽  
Morphological Variation ◽  
Multiple Correspondence Analysis ◽  
Canonical Discriminant Analysis ◽  
Descriptive Statistics ◽  
Taxonomic Significance ◽  
Significant Difference ◽  
Post Hoc ◽  
Potential Use

The aim of this study was to quantify the morphological variation of nectaries among 14 populations of Jovibarba heuffelii based on multivariate statistics, and to establish whether nectaries possess taxonomic significance for differentiating taxa within the J. heuffelii complex. To this end, we measured the width of the nectary, its height, the angle between the carpels and nectary, the shape of the nectary and the distance between nectaries were measured and analyzed. Descriptive statistics, the Tukey HSD (honest significant difference) of homogenous groups for the unequal N post-hoc test, canonical discriminant analysis (CDA) and multiple correspondence analysis (MCA) were used. Morphometric analysis showed that the quantitative and semiquantitative characteristics of nectaries in the J. heuffelii complex are highly morphologically variable, both within and between populations, and that they are unreliable as taxonomic characters for taxon differentiation within the J. heuffelii complex.

Delimiting species boundaries within the Bothriochloa saccharoides complex (Poaceae) through morphometric analysis

Phytotaxa ◽  
2013 ◽  
Vol 89 (1) ◽  
pp. 24
Author(s):  
LIDIA R. SCRIVANTI ◽  
GUILLERMO A. NORRMANN ◽  
ANA M. ANTON
Keyword(s):  
Discriminant Analysis ◽  
Morphometric Analysis ◽  
Principal Components ◽  
Morphological Variation ◽  
Species Complex ◽  
Morphological Characters ◽  
Chemical Data ◽  
Species Boundaries ◽  
Herbarium Specimens ◽  
Components Analysis

The Bothriochloa saccharoides complex is one of the most interesting groups within the genus Bothriochloa (Poaceae). The plants inhabit grasslands of tropical and subtropical regions from the Americas. Principal components analysis (PCA) and discriminant analysis (DA) were employed to evaluate the morphological variation among 60 herbarium specimens tentatively identified as B. imperatoides, B. laguroides, B. longipaniculata, B. saccharoides and B. torreyana. Twenty-three morphological characters were included in the analysis in order to clarify problematic species boundaries. Chemical data was incorporated to improve the resolution on delimitation of the species complex. Taxa were delimited according to the observed clustering of specimens in the PCA plots and discriminant analysis, and diagnostic characters were identified. The results showed that five taxa could be distinguished on the basis of morphological characters and chemical data. Two new subspecies are described: B. saccharoides subsp. americana and B. saccharoides subsp. australis. An identification key and a taxonomic synopsis are provided.

Variation in Myzus persicae (Sulz.) (Hemiptera, Aphididae) reared on different host-plants

1973 ◽  
Vol 62 (4) ◽  
pp. 549-556 ◽  
Author(s):  
H. J. B. Lowe
Keyword(s):  
Young Adults ◽  
Sugar Beet ◽  
Chinese Cabbage ◽  
Lactuca Sativa ◽  
Myzus Persicae ◽  
Host Species ◽  
Host Plants ◽  
Broad Bean ◽  
Senecio Vulgaris ◽  
Brassica Pekinensis

Apterous adult Myzus persicae (Sulz.) of a glasshouse strain differed greatly in their ability to colonise sugar-beet according to the plant on which they and their forebears were cultured. Those from Chinese cabbage (Brassica pekinensis) settled least readily on beet, whilst aphids from broad beans (Vicia faba) produced larger populations than those cultured on sugar-beet. When reared wholly on groundsel (Senecio vulgaris) young adults differed in their ability to colonise Chinese cabbage, sugar-beet and broad bean according to their parents' culture host species, and these differences were detected in a second generation reared wholly on groundsel. The responses of clones isolated from cultures maintained continuously on Chinese cabbage and broad bean were similar, showing that the effect was caused by the aphids' host-plant experience, and was not due to fixed, heritable characters of the sub-cultures. Some, but not all clones of M. persicae collected from the field showed enhanced colonising ability after culture on broad bean as compared with Chinese cabbage. This was apparent on sugar-beet and lettuce (Lactuca sativa). These effects of former hosts on the ability of M. persicae to colonise plants may be important both in work on resistance to aphids and in the epidemiology of aphid-borne diseases.

scholarly journals Establishing the resistance of Myzus persicae (Sulzer) by molecular methods

2008 ◽  
Vol 60 (3) ◽  
pp. 493-499 ◽  
Author(s):  
Andja Vucetic ◽  
Olivera Petrovic-Obradovic ◽  
J. Margaritopoulos ◽  
P. Skouras
Keyword(s):  
Myzus Persicae ◽  
Molecular Methods ◽  
Single Type ◽  
Heterozygous State ◽  
Potato Aphid ◽  
Serbia And Montenegro ◽  
Knock Down ◽  
Peach Potato Aphid

In two years of investigating resistance of the peach-potato aphid Myzus persicae (Sulzer) by molecular methods, several types of resistance were established in the majority of individuals from peach and tobacco in Serbia and Montenegro. Most of the tested individuals had the FE4 gene, which encodes production of FE4 esterase. The gene responsible for kdr (knock-down resistance) was found in the majority of individuals, but in the heterozygous state, while resistance based on formation of modified acetlycholinesterase (MACE) was least represented. Also, tests showed aphids from tobacco to be more sensitive to insecticide action than aphids from peach. Three tests were used in these investiga?tions, e.g., the PCR - esterase, PCR - kdr, and RFLP - PCR tests, each for a single type of resistance.

New Species of the Genus Periglischrus (Acari: Spinturnicidae) from Monophyllus Bats (Chiroptera: Phyllostomidae) in the West Indies, Including a Morphometric Analysis of Its Intraspecific Variation

2019 ◽  
Vol 57 (2) ◽  
pp. 418-436
Author(s):  
Juan B Morales-Malacara ◽  
Gabriela Castaño-Meneses ◽  
Hans Klompen ◽  
Carlos A Mancina
Keyword(s):  
New Species ◽  
Morphometric Analysis ◽  
Morphological Variation ◽  
Host Species ◽  
West Indies ◽  
Field Survey ◽  
Museum Collections ◽  
The West ◽  
Specific Variation ◽  
A New Species

Abstract The discovery of a new species, Periglischrus empheresotrichus, was determined through a review of museum collections, as well as a field survey of ectoparasites of island bats. This new species parasitizes on two bat species of the genus Monophyllus Leach, the Greater Antillean Long-tongued bat Monophyllus redmani Leach and the Lesser Antillean Long-tongued bat Monophyllus plethodon Miller. The female, male, deuthonymphs, and protonymph are described and illustrated. P. empheresotrichus n. sp. has an insular distribution, we evaluated the morphological variation of the adult populations, and concluded that intra-specific variation is correlated both with host species and locality (island) in the West Indies.

scholarly journals Taxonomy of the lesser jerboa Jaculus jaculus (Dipodidae, Rodentia) based on allozymic and morphological variation

2010 ◽  
Vol 56 (4) ◽  
pp. 421-431 ◽  
Author(s):  
Abderraouf Ben Faleh ◽  
Abdelwaheb Ben Othmen ◽  
Khaled Said
Keyword(s):  
Phylogenetic Analysis ◽  
Multivariate Analysis ◽  
Genetic Distance ◽  
North Africa ◽  
Morphometric Analysis ◽  
Morphological Variation ◽  
Taxonomic Status ◽  
Sympatric Species ◽  
Restricted Area ◽  
Meeting Point

Abstract The lesser Egyptian jerboa Jaculus jaculus, is a member of the subfamily Dipodinae, known to have a number of subspecies. Previous studies of J. jaculus from North Africa found various morphological forms of unknown taxonomic status, which are frequently grouped into two taxa: J. jaculus and J. deserti. We assessed the taxonomic status of this taxon in Tunisia using allozymic (phylogenetic analysis of 23 genetic loci encoding 16 enzymatic proteins) and morphological (multivariate analysis of 13 craniodental characters) analyses of 136 J. jaculus specimens collected from seven localities within its distribution range. Allozymic analysis clearly indicated the existence of two distinct groups of J. jaculus, with a mean genetic distance (D) value of 0.99 and FST=0.52. Individuals within the two groups did not show any obvious geographical structuration, even within the Matmata locality which represents the meeting point for the two groups where they were found in sympatry. Additionally, morphometric analysis of 13 craniodental characters was clearly separated the two groups. These results were obtained over a very restricted area of the total distribution of J. jaculus and strongly suggest the occurrence of two separate and often sympatric species within the currently accepted J. jaculus in Tunisia: J. jaculus and J. deserti .

scholarly journals The morphological variation of Myzus persicae on peach and tobacco in Syria

2019 ◽  
Vol 37 (4) ◽  
pp. 310-318
Author(s):  
Rasha Assaad ◽  
◽  
Luay Aslan ◽  
Hussein Mahasneh ◽  
Abdel Nabi Basheer ◽  
...  
Keyword(s):  
Morphological Variation ◽  
Myzus Persicae
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