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A karyological study of the genus Pnigalio Schrank (Hymenoptera: Eulophidae): Assessing the taxonomic utility of chromosomes at the species level

Published online by Cambridge University Press:  08 July 2011

M. Gebiola ,
M. Giorgini ,
P. Navone  and
U. Bernardo
M. Gebiola*
Affiliation:
Dipartimento di Entomologia e Zoologia Agraria ‘F. Silvestri’, Università degli Studi di Napoli ‘Federico II’, via Università 100, 80055 Portici (NA), Italy CNR – Istituto per la Protezione delle Piante, sezione di Portici (NA), via Università 133, 80055 Portici (NA), Italy
M. Giorgini
Affiliation:
CNR – Istituto per la Protezione delle Piante, sezione di Portici (NA), via Università 133, 80055 Portici (NA), Italy
P. Navone
Affiliation:
Di.Va.P.R.A. Entomologia e Zoologia applicate all'Ambiente ‘Carlo Vidano’, Università degli Studi di Torino, Via L. da Vinci 44, 10095 Grugliasco (TO), Italy
U. Bernardo
Affiliation:
CNR – Istituto per la Protezione delle Piante, sezione di Portici (NA), via Università 133, 80055 Portici (NA), Italy
*
*Author for correspondence Fax: +0817755872 E-mail: [email protected]
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Abstract

We provide a karyological study of 12 species of the genus Pnigalio in an attempt to evaluate the taxonomic utility of karyotypes at the species level. For all species of Pnigalio examined the number of chromosome was 2n=12. Karyotype formulae presented mainly metacentric and submetacentric chromosomes, although a pair of acrocentrics or subtelocentrics, shorter than biarmed chromosomes, was present in some species. The analysis of karyotypes of Pnigalio showed frequent but not general interspecific variability of the chromosome traits. Although most of the studied species revealed concordance between morphological and karyological characters (centromeric index and relative length), two other categories have been identified: morphologically distinct species without reciprocal differences in karyotype structure, and morphologically similar species that strongly differ in chromosomal characters.

Keywords

B chromosomecytotaxonomykaryogramkaryotypemorphometricsNORs
Type
Research Paper
Information
Bulletin of Entomological Research , Volume 102 , Issue 1 , February 2012 , pp. 43 - 50
Copyright
Copyright © Cambridge University Press 2011

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