P1 clones from Drosophila melanogaster as markers to study the chromosomal evolution of Muller?s A element in two species of the obscura group of Drosophila

Chromosoma ◽  
1995 ◽  
Vol 104 (2) ◽  
pp. 129-136 ◽  
Author(s):  
Carmen Segarra ◽  
Elena R. Lozovskaya ◽  
Griselda Rib� ◽  
Montserrat Aguad� ◽  
Daniel L. Hartl
Keyword(s):  
Drosophila Melanogaster ◽  
Chromosomal Evolution ◽  
Obscura Group

P1 clones from Drosophila melanogaster as markers to study the chromosomal evolution of Muller's A element in two species of the obscura group of Drosophila

Chromosoma ◽  
1995 ◽  
Vol 104 (2) ◽  
pp. 129-136 ◽  
Author(s):  
Carmen Segarra ◽  
Elena R. Lozovskaya ◽  
Griselda Rib� ◽  
Montserrat Aguad� ◽  
Daniel L. Hartl
Keyword(s):  
Drosophila Melanogaster ◽  
Chromosomal Evolution ◽  
Obscura Group

Encapsulation ability: Are all Drosophila species equally armed? An investigation in the obscura group

2009 ◽  
Vol 87 (7) ◽  
pp. 635-641 ◽  
Author(s):  
S. Havard ◽  
P. Eslin ◽  
G. Prévost ◽  
G. Doury
Keyword(s):  
Drosophila Melanogaster ◽  
Related Species ◽  
Unusual Case ◽  
Foreign Bodies ◽  
Drosophila Subobscura ◽  
Drosophila Species ◽  
Drosophila Persimilis ◽  
Obscura Group ◽  
Encapsulation Ability

Unable to form cellular capsules around large foreign bodies, the species Drosophila subobscura Collin in Gordon, 1936 was previously shown devoid of lamellocytes, the capsule-forming hemocytes in Drosophila melanogaster Meigen, 1830. This unusual case of deficiency in encapsulation ability was remarkable enough to motivate further investigations in phylogenetically related species of the obscura group. Like D. subobscura, the species Drosophila azteca Sturtevant and Dobzhansky, 1936, Drosophila bifasciata Pomini, 1940, Drosophila guanche Monclus, 1976, Drosophila miranda Dobzhansky, 1935, Drosophila persimilis Dobzhansky and Epling, 1944, and Drosophila pseudoobcura Frovola and Astaurov, 1929 were found to be unable to encapsulate large foreign bodies and also to lack lamellocytes. Surprisingly, Drosophila affinis Sturtevant, 1916, Drosophila tolteca Patterson and Mainland, 1944, and Drosophila obscura Fallen, 1823 were capable of mounting cellular capsules, although their encapsulation abilities remained weak. These three species were free of lamellocytes but possessed small pools of never before described “atypical hemocytes” present in the hemolymph when capsules were formed.

A new P element subfamily from Drosophila tristis, D. ambigua, and D. obscura

Genome ◽  
1996 ◽  
Vol 39 (5) ◽  
pp. 978-985 ◽  
Author(s):  
S. Hagemann ◽  
E. Haring ◽  
W. Pinsker
Keyword(s):  
Drosophila Melanogaster ◽  
Genomic Sequence ◽  
P Element ◽  
Inverted Repeats ◽  
Sequence Comparisons ◽  
Closely Related Species ◽  
Dna Phylogeny ◽  
P Elements ◽  
Obscura Group ◽  
Reading Frames

A new P element subfamily, designated T-type, was found in the genomes of the three closely related species Drosophila ambigua, Drosophila obscura, and Drosophila tristis. The subfamily comprises both full-sized and internally deleted P elements. The T-type element of D. ambigua is longer than the canonical P elements owing to a 300-bp insertion in the 3′ noncoding region. Tandemly arranged T-type elements were detected in D. ambigua and D. tristis. The overall structure of T-type elements resembles that of the Drosophila melanogaster P element and the termini are formed by perfect inverted repeats of 33 bp. However, none of the elements studied so far have intact reading frames. Sequence comparisons with other P element subfamilies from the obscura group indicate that the T-type elements are most closely related to the terminally truncated P homologues of Drosophila guanche and Drosophila subobscura. Therefore they can be considered as the lineage-specific P transposons of the obscura group. Furthermore, this finding indicates that the clustered P homologues of D. guanche and D. subobscura must be derived from transpositionally active P elements rather than from an immobile genomic sequence. Key words : Drosophila, obscura group, P element, transposon, DNA phylogeny.

Distribution of Drosophila melanogaster transposable element sequences in species of the obscura group

Chromosoma ◽  
1992 ◽  
Vol 101 (5-6) ◽  
pp. 293-300 ◽  
Author(s):  
R. de Frutos ◽  
K. R. Peterson ◽  
M. G. Kidwell
Keyword(s):  
Drosophila Melanogaster ◽  
Transposable Element ◽  
Obscura Group

Author response for "Location and arrangement of campaniform sensilla in Drosophila melanogaster"

2020 ◽  
Author(s):  
Gesa F. Dinges ◽  
Alexander S. Chockley ◽  
Till Bockemühl ◽  
Kei Ito ◽  
Alexander Blanke ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Author Response ◽  
Campaniform Sensilla

Live Confocal Analysis of Fertilization and Early Development

2001 ◽  
Vol 7 (S2) ◽  
pp. 1012-1013
Author(s):  
Uyen Tram ◽  
William Sullivan
Keyword(s):  
Drosophila Melanogaster ◽  
Embryonic Development ◽  
Real Time ◽  
Early Development ◽  
Fluorescent Probes ◽  
Primary Defect ◽  
Fluorescent Analysis ◽  
Dynamic Event ◽  
Enormous Amount ◽  
Fluorescent Studies

Embryonic development is a dynamic event and is best studied in live animals in real time. Much of our knowledge of the early events of embryogenesis, however, comes from immunofluourescent analysis of fixed embryos. While these studies provide an enormous amount of information about the organization of different structures during development, they can give only a static glimpse of a very dynamic event. More recently real-time fluorescent studies of living embryos have become much more routine and have given new insights to how different structures and organelles (chromosomes, centrosomes, cytoskeleton, etc.) are coordinately regulated. This is in large part due to the development of commercially available fluorescent probes, GFP technology, and newly developed sensitive fluorescent microscopes. For example, live confocal fluorescent analysis proved essential in determining the primary defect in mutations that disrupt early nuclear divisions in Drosophila melanogaster. For organisms in which GPF transgenics is not available, fluorescent probes that label DNA, microtubules, and actin are available for microinjection.

Apoptosis and development

2003 ◽  
Vol 39 ◽  
pp. 11-24 ◽  
Author(s):  
Justin V McCarthy
Keyword(s):  
Drosophila Melanogaster ◽  
Mammalian Cells ◽  
Cell Number ◽  
Model Organisms ◽  
Biological Processes ◽  
Nematode Caenorhabditis Elegans ◽  
Apoptotic Pathway ◽  
Genetic Pathways ◽  
Evolutionarily Conserved ◽  
Multicellular Organisms

Apoptosis is an evolutionarily conserved process used by multicellular organisms to developmentally regulate cell number or to eliminate cells that are potentially detrimental to the organism. The large diversity of regulators of apoptosis in mammalian cells and their numerous interactions complicate the analysis of their individual functions, particularly in development. The remarkable conservation of apoptotic mechanisms across species has allowed the genetic pathways of apoptosis determined in lower species, such as the nematode Caenorhabditis elegans and the fruitfly Drosophila melanogaster, to act as models for understanding the biology of apoptosis in mammalian cells. Though many components of the apoptotic pathway are conserved between species, the use of additional model organisms has revealed several important differences and supports the use of model organisms in deciphering complex biological processes such as apoptosis.

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