First report on a multiple sex chromosome system (X1X2X30) and population variations in the frequency of ring bivalents in Pyrrhocoridae (Hemiptera: Heteroptera)
The family Pyrrhocoridae (Hemiptera: Heteroptera) is characterized by a modal diploid chromosome number of 16 (♂) ranging from 12 to 33 and simple (X0), multiple (X1X20) and neo-sex chromosome systems (neoX-neoY). Out of about 340 known species, only 22 species belonging to 7 genera have to date bee...
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Institute of Entomology, Biology Centre, Czech Academy of Science
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doaj-f8c8999aeb6140b1a524dd27c8977d302021-04-16T20:35:35ZengInstitute of Entomology, Biology Centre, Czech Academy of ScienceEuropean Journal of Entomology1210-57591802-88292015-07-01112341942510.14411/eje.2015.063eje-201503-0003First report on a multiple sex chromosome system (X1X2X30) and population variations in the frequency of ring bivalents in Pyrrhocoridae (Hemiptera: Heteroptera)Harbhajan KAUR0Kalchana GABA1Department of Zoology and Environmental Sciences, Punjabi University, Patiala-147002, India; e-mail: harbhajankaur@hotmail.comDepartment of Zoology and Environmental Sciences, Punjabi University, Patiala-147002, India; e-mail: harbhajankaur@hotmail.comThe family Pyrrhocoridae (Hemiptera: Heteroptera) is characterized by a modal diploid chromosome number of 16 (♂) ranging from 12 to 33 and simple (X0), multiple (X1X20) and neo-sex chromosome systems (neoX-neoY). Out of about 340 known species, only 22 species belonging to 7 genera have to date been cytogenetically analysed. In the present study, the chromosome complement and meiotic details of one species, Odontopus nigricornis Stål has been revised, whilst that of another species, Antilochus russus Stål has been cytogenetically analyzed for the first time. The diploid chromosome complement of O. nigricornis is 2n (♂) = 25 = 22A + X1X2X30; the first time this particular multiple sex chromosome system has been reported in the Pyrrhocoridae. Three sex chromosomes mostly remain intimately associated during male meiosis and their number was confirmed at diplotene and anaphase II, where they dissociate slightly to become distinct. Meiosis is post-reductional for sex chromosomes. However, unlike other pyrrhocorids with multiple X chromosomes, the X1, X2 and X3 lie outside the autosomal ring on the metaphase plate during both divisions. The male diploid chromosome complement of A. russus was found to be 2n = 27 = 26A + X0. Apart from the typical meiotic features of heteropterans, the latter species shows inter- and intra-population variations in frequency of ring bivalents.https://www.eje.cz/artkey/eje-201503-0003_First_report_on_a_multiple_sex_chromosome_system_X1X2X30_and_population_variations_in_the_frequency_of_ring_b.phpheteropterapyrrhocoridaechromosomesmale meiosismultiple xsring bivalentspopulation variation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Harbhajan KAUR Kalchana GABA |
spellingShingle |
Harbhajan KAUR Kalchana GABA First report on a multiple sex chromosome system (X1X2X30) and population variations in the frequency of ring bivalents in Pyrrhocoridae (Hemiptera: Heteroptera) European Journal of Entomology heteroptera pyrrhocoridae chromosomes male meiosis multiple xs ring bivalents population variation |
author_facet |
Harbhajan KAUR Kalchana GABA |
author_sort |
Harbhajan KAUR |
title |
First report on a multiple sex chromosome system (X1X2X30) and population variations in the frequency of ring bivalents in Pyrrhocoridae (Hemiptera: Heteroptera) |
title_short |
First report on a multiple sex chromosome system (X1X2X30) and population variations in the frequency of ring bivalents in Pyrrhocoridae (Hemiptera: Heteroptera) |
title_full |
First report on a multiple sex chromosome system (X1X2X30) and population variations in the frequency of ring bivalents in Pyrrhocoridae (Hemiptera: Heteroptera) |
title_fullStr |
First report on a multiple sex chromosome system (X1X2X30) and population variations in the frequency of ring bivalents in Pyrrhocoridae (Hemiptera: Heteroptera) |
title_full_unstemmed |
First report on a multiple sex chromosome system (X1X2X30) and population variations in the frequency of ring bivalents in Pyrrhocoridae (Hemiptera: Heteroptera) |
title_sort |
first report on a multiple sex chromosome system (x1x2x30) and population variations in the frequency of ring bivalents in pyrrhocoridae (hemiptera: heteroptera) |
publisher |
Institute of Entomology, Biology Centre, Czech Academy of Science |
series |
European Journal of Entomology |
issn |
1210-5759 1802-8829 |
publishDate |
2015-07-01 |
description |
The family Pyrrhocoridae (Hemiptera: Heteroptera) is characterized by a modal diploid chromosome number of 16 (♂) ranging from 12 to 33 and simple (X0), multiple (X1X20) and neo-sex chromosome systems (neoX-neoY). Out of about 340 known species, only 22 species belonging to 7 genera have to date been cytogenetically analysed. In the present study, the chromosome complement and meiotic details of one species, Odontopus nigricornis Stål has been revised, whilst that of another species, Antilochus russus Stål has been cytogenetically analyzed for the first time. The diploid chromosome complement of O. nigricornis is 2n (♂) = 25 = 22A + X1X2X30; the first time this particular multiple sex chromosome system has been reported in the Pyrrhocoridae. Three sex chromosomes mostly remain intimately associated during male meiosis and their number was confirmed at diplotene and anaphase II, where they dissociate slightly to become distinct. Meiosis is post-reductional for sex chromosomes. However, unlike other pyrrhocorids with multiple X chromosomes, the X1, X2 and X3 lie outside the autosomal ring on the metaphase plate during both divisions. The male diploid chromosome complement of A. russus was found to be 2n = 27 = 26A + X0. Apart from the typical meiotic features of heteropterans, the latter species shows inter- and intra-population variations in frequency of ring bivalents. |
topic |
heteroptera pyrrhocoridae chromosomes male meiosis multiple xs ring bivalents population variation |
url |
https://www.eje.cz/artkey/eje-201503-0003_First_report_on_a_multiple_sex_chromosome_system_X1X2X30_and_population_variations_in_the_frequency_of_ring_b.php |
work_keys_str_mv |
AT harbhajankaur firstreportonamultiplesexchromosomesystemx1x2x30andpopulationvariationsinthefrequencyofringbivalentsinpyrrhocoridaehemipteraheteroptera AT kalchanagaba firstreportonamultiplesexchromosomesystemx1x2x30andpopulationvariationsinthefrequencyofringbivalentsinpyrrhocoridaehemipteraheteroptera |
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