The kinetochore of the hemiptera

Hughes‐Schrader, Sally; Schradér, Franz

doi:10.1007/bf00328928

Cited by 177 publications

(105 citation statements)

References 28 publications

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“…The chromosomal features and behavior as seen at the early anaphase were nearly identical to those observed in some Hemiptera such as Eusehistus and Solub ea by Hughes-Schrader and Schrader (1961) . The latter authors have described in their paper that in anaphasic disjunction the separating chromatids remain parallel to each other as they move "broadside on" to the pole .…”

supporting

confidence: 72%

“…To date, holokinetic chromosomes characterized by diffuse kinetochores have been known to occur in the insects belonging to the following orders : Hemiptera (Schrader 1940 ;Ris 1942 ;Hughes-Schrader 1948;Helenius 1952;Rao 1957-58;Halkka 1959;Parshad 1958;Hughes-Schrader and Schrader 1961;Ueshima 1963Ueshima , 1979 ; Anoplura (Bayreuther 1955) ; Mallophaga (Scholl 1955) ; Dermaptera (Ortiz 1969, White 1971 ; Odonata (Schrader 1947 ;Kiauta 1967-9) ; and in some plants such as Luzula (Nordenskiold 1951(Nordenskiold , 1961La Cour 1952;Kusanagi 1962) . The holokinetic chromosomes are generally characterized by the behavior with the distinctive nature based on diffuse kinetochore activity.…”

mentioning

confidence: 99%

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The kinetochore of the Lepidoptera. I. Chromosomal features and behavior in mitotic and meiotic-I cells.

Maeki

1980

Proceedings of the Japan Academy. Ser. B: Physical and Biologic

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supporting

confidence: 72%

mentioning

confidence: 99%

The kinetochore of the Lepidoptera. I. Chromosomal features and behavior in mitotic and meiotic-I cells.

Maeki

1980

Proceedings of the Japan Academy. Ser. B: Physical and Biologic

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“…Heteroptera have been very important for cytogenetic studies because they possess holocentric chromosomes, late chromosome migration in anaphase and a diffuse stage that lasts from prophase I until early diplotene (Ueshima, 1979;Hughes-Schrader and Schrader, 1961). The typical autosome number (A) in triatomines is 20 (Panzera et al, 1996) (Panzera et al 1996;Panzera et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

“…Late chromosome migration was observed during meiotic anaphase in T. klugi, a phenomenon also described in Panstrongylus herreri (Tartarotti and Azeredo-Oliveira, 1999a), T. brasiliensis, T. delpontei, T. lecticularia, T. rubrovaria and T. sordida (Tavares and Azeredo-Oliveira, 1997). Late migrating chromosomes can appear either spontaneously or as a consequence of radiation in somatic or germinative cells (Hughes-Schrader and Schrader, 1961).…”

Section: And Male Triatoma Klugi Had 20 Autosomes and Two Sex Chromosmentioning

confidence: 99%

Spermatogenesis and nucleolar activity in Triatoma klugi (triatomine, Heteroptera)

2008

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Triatoma klugi is a Chagas disease vector in the Rio Grande do Sul State. Triatominae chromosomes are holocentric and sex chromosomes segregation is post-reductional. In this paper we describe the karyotype of male T. klugi and a meiotic analysis including the nucleolar behavior during spermatogenesis. Testis cells were analyzed after lactoacetic orcein and silver nitrate staining. Two autosomes and the heterochromosomes presented nucleolar activity (Ag-NORs) during diplotene-diakinesis. The analysis of metaphase I and II revealed a karyotype with 2n = 20+XY. In metaphase I a prominent nucleolar mass was observed in the cell periphery and small silver grains were detected in metaphase II. During anaphase, the chromosomes segregated in parallel and a typical holocentric late migration behavior was observed. The restoration of the nucleolus was an important feature in this phase. During telophase nucleolar masses persisted and in early spermiogenesis the spermatids presented a small peripheral mass until elongation. The present study is a contribution to the study of chromatin behavior and nucleolar persistence in meiosis.

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“…This means that interchange multiples will maintain the cross configurations produced at zygotene pairing and will not open out into rings and chains. The centromere system of scorpions has been variously interpreted but the balance of evidence unquestionably favours the view that it is non-localised (Hughes-Schrader and Schrader, 1961). Even so the first division is reductional.…”

Section: )mentioning

confidence: 99%