Karyotype and male pre-reductional meiosis of the sharpshooter Tapajosa rubromarginata (Hemiptera: Cicadellidae)

 

Authors
R. de Bigliardo, Graciela; Gabriel Virla, Eduardo; Caro, Sara; Murillo Dasso, Santiago
Format
Article
Status
publishedVersion
Description

Cicadellidae in one of the best represented families in the Neotropical Region, and the tribe Proconiini comprises most of the xylem-feeding insects, including the majority of the known vectors of xylem-born phytopathogenic organisms. The cytogenetics of the Proconiini remains largely unexplored. We studied males of Tapajosa rubromarginata (Signoret) collected at El Manantial (Tucumán, Argentina) on native spontaneous vegetation where Sorghum halepense predominates. Conventional cytogenetic techniques were used in order to describe the karyotype and male meiosis of this sharpshooter. T. rubromarginata has a male karyological formula of 2n=21 and a sex chromosome system XO:XX ( : ). The chromosomes do not have a primary constriction, being holokinetic and the meiosis is pre-reductional, showing similar behavior both for autosomes and sex chromosomes during anaphase I. For this stage, chromosomes are parallel to the acromatic spindle with kinetic activities in the telomeres. They segregate reductionally in the anaphase I, and towards the equator during the second division of the meiosis. This is the first contribution to cytogenetic aspects on proconines sharpshooters, particularly on this economic relevant Auchenorrhyncha species. Rev. Biol. Trop. 59 (1): 309- 314. Epub 2011 March 01.

Publication Year
2010
Language
Inglés
Topic
Insecta
citogenética
Proconiini
cariotipo
cromosomas holocinéticos
cromosomas sexuales
Cicadellidae
karyotype
holokinetic chromosomes
sex chromosomes
Fuente
Portal de Revistas UCR
Get full text
https://revistas.ucr.ac.cr/index.php/rbt/article/view/3200
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openAccess
Licencia