Chromosomes of Richardiidae, Otitidae and Platystomatidae (Diptera: Acalyptratae)

Boves, J. Wallace; Brink, Janny M. van; Boyes, Beatrice C.

doi:10.1007/bf00116809

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…Their data indicate that the 12-chromosome complements of Muscidae are somewhat longer (73.6 tx for 413 complements); of Sarcophagidae, very similar in length (65.9 tx for 220 complements; and of Tachinidae somewhat shorter (57.4 ~ for 187 complements). In the Acalyptratae, 42 complements of Otitidae have 2n = 12 and averaged 51.5 tx (BOYES et al, 1973b), 624 of Sciomyzidae, 66.5 Ix and 71 of Lauxaniidae 58.1/x (BOYES et al, 1975). In the Brachycera 11 such complements averaged 50.8 tx in the Stratiomyiidae ; 10 averaged 39.9 tx in the Tabanidae (BOYES & WILKES, 1972) and 8 in the Bombyliidae averaged 41.7 fx (BO'CES & SHEWELL, 1973C).…”

Section: Total Complement Lengthsmentioning

confidence: 97%

Cytotaxonomy ofCalliphoridae (Diptera)

Boyes

Shewell²

1975

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A modification of the general system of classification of Calliphoridae is proposed in this report. Information about the chromosome complements of about 90 species is provided including references to the earlier literature on chromosomes of this family. With one exception all species studied by us or by earlier investigators have 2n = 12. The total complement length of 556 complements from 83 species averaged 66.4/x. Most species have a short heteromorphic sex pair but the size and morphology vary considerably and one species, HemipyreUia fernandica, seems to have a quadrivalent sex-chromosome complex in a 2n = 14 complement. The autosomal pairs vary in both length and arm ratios between the species but seem to be more stable than the sex chromosomes. Only minor variations were found between different collections of the same species except for two collections of Calliphora croceipalpis. Although presently available data on the chromosomes of Diptera species suggest that increases in total complement length accompany evolutionary progress, no such general trends were obvious in either the total complement lengths or chromosome morphology, either within or between the tribes of Calliphoridae. Thus the karyotypical reorganizations in the family have apparently not been directly associated with changes in the general morphological features of the adults which may have responded in these respects more extensively to genetic mutations.

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Section: Total Complement Lengthsmentioning

confidence: 97%

Cytotaxonomy ofCalliphoridae (Diptera)

Boyes

Shewell²

1975

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“…The best outgroups for this purpose are the Steganinae subfamily (which belongs to the same Drosophilidae family) and sister families such as Ephydridae and Curtonotidae. Little is known about their chromosomes, and the limited data from more distant Acalyptrata families are contradictory, with one study suggesting that the Drosophilidae karyotype is highly derived [60], and another suggesting that it is ancestral [61]. An investigation of the karyotype of outgroups such as Ephydridae is clearly needed.…”

Section: An Alternative Hypothesis For the Origin Of The Drosophila Ymentioning

confidence: 99%

Origin and evolution of Y chromosomes: Drosophila tales

2009

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Classically Y chromosomes are thought to originate from X chromosomes through a process of degeneration and gene loss. Now, the availability of 12 Drosophila genomes provides the opportunity to study the origin and evolution of Y chromosomes in an informative phylogenetic context. Surprisingly, the majority of Drosophila Y-linked genes are recent acquisitions from autosomes, and Y chromosome gene gains are more frequent than gene losses. Moreover, the D. pseudoobscura Y chromosome lacks homology with the Y of most Drosophila species. Thus the Drosophila Y has a different evolutionary history from canonical Y chromosomes (such as the mammalian Y), and it also might have a different origin.

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Chromosomes of Richardiidae, Otitidae and Platystomatidae (Diptera: Acalyptratae)

Cited by 2 publications

References 14 publications

Cytotaxonomy ofCalliphoridae (Diptera)

Cytotaxonomy ofCalliphoridae (Diptera)

Origin and evolution of Y chromosomes: Drosophila tales

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