Meiotic sister chromatid cohesion in holocentric sex chromosomes of three heteropteran species is maintained in absence of axial elements

Suja, José Á.; Cerro, A. L. del; Page, Jesús; Rufas, Julio S.; Santos, Juan Luis

doi:10.1007/s004120050410

Cited by 30 publications

(39 citation statements)

References 35 publications

(44 reference statements)

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“…5d). This feature is independent of the mechanism of sex chromosome determination because it is common to species with XY, X0, X 1 X 2 Y, or X 1 X 2 00 males (Suja et al 2000).…”

Section: Sex Chromosomes In Orthopterans Do Not Show Any Structural Mmentioning

confidence: 97%

“…This conclusion emerged from ultrastructural studies, which have failed to detect AEs along sex chromosomes neither in spreads nor in sections (Solari 1979;Suja et al 2000;Pigozzi and Solari 2003), although a fuzzy core of undetermined nature is a Electron microscopy image of the single AE of the X chromosome of a grasshopper obtained by silver staining of a surface spread spermatocyte. This AE is similar to the LEs of the autosomal bivalents (A) and does not show any structural modification.…”

Section: Sex Chromosomes In Orthopterans Do Not Show Any Structural Mmentioning

confidence: 99%

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Sex chromosomes, synapsis, and cohesins: a complex affair

et al. 2006

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During first meiotic prophase, homologous chromosomes are held together by the synaptonemal complex, a tripartite proteinaceous structure that extends along the entire length of meiotic bivalents. While this feature is applicable for autosomes, sex chromosomes often escape from this rule. Many species present sex chromosomes that differ between them in their morphology, length, and gene content. Moreover, in some species, sex chromosomes appear in a single dose in one of the sexes. In all of these cases, the behavior of sex chromosomes during meiosis is conspicuously affected, and this includes the assembly and dynamics of the synaptonemal complex. We review in this study the structure of the synaptonemal complex in the sex chromosomes of three groups of organisms, namely: mammals, orthopterans, and hemipterans, which present different patterns of sex chromosome structure and behavior. Of special interest is the analysis of the organization of the axial/lateral elements of the synaptonemal complex in relation to other axial structures organized along meiotic chromosomes, mainly the cohesin axis. The differences found in the behavior of both axial structures reveal that while the organization of a cohesin axis along sex chromosomes is a conserved feature in most organisms and it shows very little morphological variations, the axial/lateral elements of the synaptonemal complex present a wide range of structural modifications on these chromosomes.

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“…5d). This feature is independent of the mechanism of sex chromosome determination because it is common to species with XY, X0, X 1 X 2 Y, or X 1 X 2 00 males (Suja et al 2000).…”

Section: Sex Chromosomes In Orthopterans Do Not Show Any Structural Mmentioning

confidence: 97%

Section: Sex Chromosomes In Orthopterans Do Not Show Any Structural Mmentioning

confidence: 99%

Sex chromosomes, synapsis, and cohesins: a complex affair

et al. 2006

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“…At meiosis, however, the kinetic activity is restricted to the telomere regions and chromosomes are therefore called telokinetic (Motzko and Ruthmann, 1984). Meiotic behavior is different among autosomal bivalents and sex chromosomes (Ueshima, 1979;Manna, 1984;Papeschi and Mola, 1990;González-Garcia et al, 1996;Suja et al, 2000). Except for a few species, autosomal bivalents are chiasmatic and segregate pre-reductionally (Nokkala and Grozeva, 2000).…”

Section: Introductionmentioning

confidence: 99%

Morphological patterns of the heteropycnotic chromatin and nucleolar material in meiosis and spermiogenesis of some Pentatomidae (Heteroptera)

et al. 2008

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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 three lobes in M. v-luteum and four in the Oebalus species. A karyotype with 2n = 14 chromosomes (12A + XY) was observed in the three species. Several characteristics were common to the three species, such as the absence of a testicular harlequin lobe (a lobe which produces different types of spermatozoa, previously considered a general characteristic of this family), late migration of the sex chromosomes and semi-persistence of the nucleolus. The three species also shared some characteristics regarding the patterns of the heteropycnotic chromatin and nucleolar material, but differed in others mainly related to the location of the heteropycnotic chromatin in the spermatids and the morphology and distribution of the nucleolar material at zygotene. The differences were always between species from different genera, suggesting a relationship with their genetic divergence.

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“…At meiosis, however, the kinetic activity is restricted to telomeric regions, and chromosomes are, therefore, denominated telokinetic (Motzko & Ruthmann, 1984). Meiotic behavior is slightly different among bivalent autosomes, sex chromosomes and micro-chromosomes (Ueshima, 1979;Manna, 1984;Papeschi & Mola, 1990;González-Garcia et al, 1996;Suja et al, 2000). Except in a few species, bivalent autosomes are chiasmatic while stick-shaped bivalents are axially oriented and segregate pre-reductionally (Nokkala & Grozeva, 2000).…”

Section: Introductionmentioning

confidence: 99%

A study of meiosis and spermiogenesis in the testicular lobes of Antiteuchus tripterus (Heteroptera: Pentatomidae)

Souza¹,

Bicudo²,

Costa³

et al. 2007

Eur. J. Entomol.

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Abstract. An analysis of testicular morphology and spermatogenesis in the Heteroptera species Antiteuchus tripterus (Pentatomidae) revealed that these traits differ from that recorded for other species of the same family. The testes of A. tripterus have only six lobes, while other species of the same family typically have seven lobes, including a compound lobe, i.e., a lobe containing another in its lumen. A study of meiosis and sperm structure in the different lobes of A. tripterus revealed a conventional meiosis in the lobes numbered one to three. In lobe four, however, prophase I spermatocytes exhibit the morphological characteristics of the so called "diffuse" stage and are larger than those in lobes 1-3 in this and the remaining phases of meiosis. Thus, the resulting spermatids are not only larger but also their head is morphologically different. Lobe 5 exhibits characteristics known from other Pentatomidae species such as an uneven distribution of chromatin to the daughter cells, which give rise to cells of different sizes. This lobe forms spermatozoa of different sizes. Lobe 6, contained within lobe 5, differs from it by having larger cells at a stage similar to the so called "diffuse" and spermatid tails with cross divisions, which are not found in other lobes and unreported in the literature.

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Meiotic sister chromatid cohesion in holocentric sex chromosomes of three heteropteran species is maintained in absence of axial elements

Cited by 30 publications

References 35 publications

Sex chromosomes, synapsis, and cohesins: a complex affair

Sex chromosomes, synapsis, and cohesins: a complex affair

Morphological patterns of the heteropycnotic chromatin and nucleolar material in meiosis and spermiogenesis of some Pentatomidae (Heteroptera)

A study of meiosis and spermiogenesis in the testicular lobes of Antiteuchus tripterus (Heteroptera: Pentatomidae)

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