The Relationship between Dna Content and Alternative Meiotic Patterns in Certain Discocephalinids (pentatomidae; Heteroptera)
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چکیده
منابع مشابه
Morphological patterns of the heteropycnotic chromatin and nucleolar material in meiosis and spermiogenesis of some Pentatomidae (Heteroptera)
Pentatomidae is a family of Heteroptera which includes several agriculture pests that have had different aspects of their meiosis and spermiogenesis analyzed. In the present study we analyzed the morphological patterns of the heteropycnotic chromatin and the nucleolar material of Mormidea v-luteum, Oebalus poecilus and Oebalus ypsilongriseus. The three species presented multilobate testes, with...
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Heteropteran chromosomes are holokinetic; during mitosis, sister chromatids segregate parallel to each other but, during meiosis, kinetic activity is restricted to one pair of telomeric regions. This meiotic behaviour has been corroborated for all rod bivalents. For ring bivalents, we have previously proposed that one of the two chiasmata releases ¢rst, and a telokinetic activity is also achiev...
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Thestral incognitus, new genus and species of Pentatomidae (Pentatominae: Carpocorini) is described from central Chile. The relationships among this new genus and other South American genera are discussed. Also, similarities are noted between Thestral and the Australian genus Poecilotoma. Poecilotoma is tentatively placed in the Carpocorini. A key to aid in the recognition of the genera of Chi...
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The mitochondrial cytochrome oxidase subunit 1 (COI) gene is one of the most popular markers used for molecular systematics. Fragments of this gene are often used to infer phylogenies, particularly the region near the 5'-end, which is used by the DNA Barcoding Consortium. With a growing number of sequences being deposited in the DNA barcoding database, there is an urgent need to understand the ...
متن کاملFirst report on meiotic behavior of chromosomes in three species of subfamily Pentatominae (Pentatomidae: Heteroptera).
Regardless of rich biodiversity, cytogenetic reports on Pentatomidae refer to less than 400 species. This paper reports, for the first time, course of meiosis of three species of subfamily Pentatominae viz., Tolumnia antennata Distant, Cahara jugatoria (Lethierry) and Cahara confusa (Distant). Species-specific variations observed with respect to association pattern of X and Y during prophase, a...
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عنوان ژورنال:
- The Journal of Biophysical and Biochemical Cytology
دوره 9 شماره
صفحات -
تاریخ انتشار 1961