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Nematologica
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DIGITAL.CSIC
Article . 2017 . Peer-reviewed
Data sources: DIGITAL.CSIC
Nematologica
Article . 1987 . Peer-reviewed
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Evaluation of Characters Used To Identify Species of the Genus Rotylenchus Filipjev, 1936 (Nematoda: Hoplolaimidae)

Authors: Zancada Fernández, M. Cristina ; Mahajan, Rajesh; Sánchez, Agustín;

Evaluation of Characters Used To Identify Species of the Genus Rotylenchus Filipjev, 1936 (Nematoda: Hoplolaimidae)

Abstract

[FR]Les différents caractères utilisés dans l'identification des espèces du genre Rotylenchus ont été évalués. Quatre-vingt onze populations appartenant à 45 espèces du genre ont été soumises à l'analyse des composants principaux. Dix caractères représentant l'effet général de la taille contribuent de façon similaire à la dispersion des OTUs tout au long du premier composant principal. Les plus grandes espèces sont dirigées vers la direction positive. Un nombre relativement inférieur de caractères est responsable de la dispersion le long du second composant principal. Deux nouveaux rapports biométriques sont proposés. Le rapport k (largeur des boutons du stylet/hauteur des boutons du stylet) comme indicateur de l'aplatissement des boutons du stylet, et le rapport rb (longueur/largeur du bulbe médian) comme indicateur de la rotondité du bulbe médian. Il est suggéré que le rapport 0 soit remplacé par la valeur réelle de la distance entre le débouché de la glande oesophagienne dorsale et la base du stylet.

[EN]Different characters used to identify species of the genus Rotylenchus have been evaluated. Ninety-one populations belonging to 45 species of the genus were subjected to principal component analyses. Ten characters representing the general size effect contributed similarly to the OTUs' dispersion along the first principal component. Larger species were pushed in a positive direction. Relatively fewer characters were responsible for the dispersion along the second principal component. Two new ratios are proposed. Ratio k = width of spear knobs/height of spear knobs, as an index of flatness of the knobs, and rb = length of median bulb/width of median bulb, as an index of roundness of the median bulb. The actual value of the distance from outlet to spear base should be used instead of ratio O.

Instituto de Edafología y Biología Vegetal- CSIC

12 páginas, 3 tablas y 4 figuras.

Peer reviewed

Country
Spain
Keywords

Plant nematodes, Analysis, Spyral nematodes, Taxonomy

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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