دورية أكاديمية
General trends of chromosomal evolution in Aphidococca (Insecta, Homoptera, Aphidinea + Coccinea)
| العنوان: | General trends of chromosomal evolution in Aphidococca (Insecta, Homoptera, Aphidinea + Coccinea) |
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| المؤلفون: | Ilya Gavrilov-Zimin, Andrey Stekolshchikov, D.C. Gautam |
| المصدر: | Comparative Cytogenetics, Vol 9, Iss 3, Pp 335-422 (2015) |
| بيانات النشر: | Pensoft Publishers, 2015. |
| سنة النشر: | 2015 |
| المجموعة: | LCC:Genetics |
| مصطلحات موضوعية: | Genetics, QH426-470 |
| الوصف: | Parallel trends of chromosomal evolution in Aphidococca are discussed, based on the catalogue of chromosomal numbers and genetic systems of scale insects by Gavrilov (2007) and the new catalogue for aphids provided in the present paper. To date chromosome numbers have been reported for 482 species of scale insects and for 1039 species of aphids, thus respectively comprising about 6% and 24% of the total number of species. Such characters as low modal numbers of chromosomes, heterochromatinization of part of chromosomes, production of only two sperm instead of four from each primary spermatocyte, physiological sex determination, "larval" meiosis, wide distribution of parthenogenesis and chromosomal races are considered as a result of homologous parallel changes of the initial genotype of Aphidococca ancestors. From a cytogenetic point of view, these characters separate Aphidococca from all other groups of Paraneoptera insects and in this sense can be considered as additional taxonomic characters. In contrast to available paleontological data the authors doubt that Coccinea with their very diverse (and partly primitive) genetic systems may have originated later then Aphidinea with their very specialised and unified genetic system. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1993-0771 1993-078X |
| Relation: | http://compcytogen.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_pdf&item_id=4930; https://doaj.org/toc/1993-0771; https://doaj.org/toc/1993-078X |
| DOI: | 10.3897/CompCytogen.v9i3.4930 |
| URL الوصول: | https://doaj.org/article/917f777219974b65bf1be381c43a3a04 |
| رقم الأكسشن: | edsdoj.917f777219974b65bf1be381c43a3a04 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 19930771 1993078X |
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| DOI: | 10.3897/CompCytogen.v9i3.4930 |