A clonal analysis of cell lineage and growth in the male and female genital disc ofDrosophila melanogaster

1982 ◽  
Vol 191 (1) ◽  
pp. 42-55 ◽  
Author(s):  
Kurt D�bendorfer ◽  
Rolf N�thiger
Keyword(s):  
Cell Lineage ◽  
Clonal Analysis ◽  
Male And Female ◽  
Genital Disc ◽  
Female Genital

scholarly journals Sex determination genes control the development of the Drosophila genital disc, modulating the response to Hedgehog, Wingless and Decapentaplegic signals

Development ◽  
2001 ◽  
Vol 128 (7) ◽  
pp. 1033-1043 ◽  
Author(s):  
L. Sanchez ◽  
N. Gorfinkiel ◽  
I. Guerrero
Keyword(s):  
Sex Determination ◽  
Larval Development ◽  
Signaling Pathway ◽  
Sexual Development ◽  
Gene Target ◽  
Male And Female ◽  
Genital Disc ◽  
Genital Discs ◽  
Female Genital ◽  
Male Genital

In both sexes, the Drosophila genital disc contains the female and male genital primordia. The sex determination gene doublesex controls which of these primordia will develop and which will be repressed. In females, the presence of Doublesex(F) product results in the development of the female genital primordium and repression of the male primordium. In males, the presence of Doublesex(M) product results in the development and repression of the male and female genital primordia, respectively. This report shows that Doublesex(F) prevents the induction of decapentaplegic by Hedgehog in the repressed male primordium of female genital discs, whereas Doublesex(M) blocks the Wingless pathway in the repressed female primordium of male genital discs. It is also shown that Doublesex(F) is continuously required during female larval development to prevent activation of decapentaplegic in the repressed male primordium, and during pupation for female genital cytodifferentiation. In males, however, it seems that Doublesex(M) is not continuously required during larval development for blocking the Wingless signaling pathway in the female genital primordium. Furthermore, Doublesex(M) does not appear to be needed during pupation for male genital cytodifferentiation. Using dachshund as a gene target for Decapentaplegic and Wingless signals, it was also found that Doublesex(M) and Doublesex(F) both positively and negatively control the response to these signals in male and female genitalia, respectively. A model is presented for the dimorphic sexual development of the genital primordium in which both Doublesex(M) and Doublesex(F) products play positive and negative roles.

scholarly journals Winklerites serbicus, a new endogean species of ground beetles (Coleoptera: Carabidae: Bembidiini) from southeastern Serbia

2013 ◽  
Vol 65 (2) ◽  
pp. 773-780
Author(s):  
S. Curcic ◽  
D. Antic ◽  
T. Radja ◽  
S. Makarov ◽  
B. Curcic ◽  
...  
Keyword(s):  
New Species ◽  
Ground Beetle ◽  
Ground Beetles ◽  
Beetle Species ◽  
Southeastern Part ◽  
Male And Female ◽  
Female Genital ◽  
Southeastern Serbia

A new endogean bembidiine ground beetle species, Winklerites serbicus sp. n., from a cave in the southeastern part of Serbia is both described and diagnosed. Male and female genital structures and other taxonomically important characters are illustrated. The new species is clearly distinct from its closest congeners. Fifteen species of the genus so far known are arranged in six groups. The new species is both endemic and relict, inhabiting southeastern Serbia only.

scholarly journals Coevolution of Male and Female Genital Morphology in Waterfowl

PLoS ONE ◽  
2007 ◽  
Vol 2 (5) ◽  
pp. e418 ◽  
Author(s):  
Patricia L.R. Brennan ◽  
Richard O. Prum ◽  
Kevin G. McCracken ◽  
Michael D. Sorenson ◽  
Robert E. Wilson ◽  
...  
Keyword(s):  
Genital Morphology ◽  
Male And Female ◽  
Female Genital

Cytology of the Male and Female Genital Tracts

2014 ◽  
pp. 213-229
Author(s):  
Gary C.W. England ◽  
Kristen R. Friedrichs
Keyword(s):  
Male And Female ◽  
Female Genital

The control of trichome spacing and number in Arabidopsis

Development ◽  
1996 ◽  
Vol 122 (3) ◽  
pp. 997-1005 ◽  
Author(s):  
J.C. Larkin ◽  
N. Young ◽  
M. Prigge ◽  
M.D. Marks
Keyword(s):  
Minimum Distance ◽  
Cell Lineage ◽  
Clonal Analysis ◽  
Chromosome 2 ◽  
Major Locus ◽  
Cell Lineages ◽  
Trichome Development ◽  
Spacing Pattern ◽  
Trait Locus ◽  
Locus Mapping

Arabidopsis trichomes are single-celled epidermal hairs that serve as a useful model for the study of plant cell differentiation. An examination of the distribution of trichomes early in their development revealed that developing trichomes occur adjacent to another trichome much less frequently than would be expected by chance. Clonal analysis of epidermal cell lineages ruled out a role for cell lineage in generating the observed minimum-distance spacing pattern. Taken together, these results are consistent with a role for lateral inhibition in the control of trichome development. We also report the identification of a new locus, Reduced Trichome Number (RTN), which affects the initiation of trichomes. This locus was initially detected by the reduced number of leaf trichomes on Landsberg erecta plants compared to that on Columbia plants. Quantitative Trait Locus mapping revealed that more than 73% of the variation in trichome number was due to a major locus near erecta on chromosome 2. The reduced number of trichomes conditioned by the Landsberg erecta allele of this locus appeared to be due to an early cessation of trichome initiation. The implications of these observations are discussed with regard to previously published models of trichome development.

The use of ‘normal’ and ‘transformed’ gynandromorphs in mapping the primordial germ cells and the gonadal mesoderm in Drosophila

Development ◽  
1976 ◽  
Vol 35 (3) ◽  
pp. 607-616
Author(s):  
W. J. Gehring ◽  
E. Wieschaus ◽  
M. Holliger
Keyword(s):  
Germ Cells ◽  
Primordial Germ Cells ◽  
Cell Lineage ◽  
Ventral Side ◽  
Drosophila Embryo ◽  
The Real ◽  
Genital Disc ◽  
Stage Of Development ◽  
Data Support ◽  
Blastoderm Stage

The primordial germ cells and the gonadal mesoderm were mapped in the Drosophila embryo by analyzing the patterns of mosaicism in ‘normal’ and ‘transformed’ gynandromorphs. Relative to the adult cuticular markers the germ cells map as the posterior moststructure, which coincides with their known location in the blastoderm embryo. These data support the hypothesis that the gynandromorph map reflects the real position of the pri-mordia in the embryo. Since after the blastoderm stage the primordial germ cells migrateanteriorly these data also indicate that the map in fact corresponds to the blastoderm stageand not to a later stage of development. The genital disc maps as a single median primordium anterior and ventral to the germ cells, the gonadal mesoderm is located anterior to the genital disc and also forms a single median primordium on the ventral side of the embryo. The primordia for the genital disc and the gonadal mesoderm are unusually large in size, which presumably reflects some indeterminacy of the cell lineage leading to an ‘expansion’ of the map.

scholarly journals Are hemipenial traits under sexual selection in Tropidurus lizards? Hemipenial development, male and female genital morphology, allometry and coevolution in Tropidurus torquatus (Squamata: Tropiduridae)

PLoS ONE ◽  
2019 ◽  
Vol 14 (7) ◽  
pp. e0219053 ◽  
Author(s):  
Anderson Kennedy Soares De-Lima ◽  
Ingrid Pinheiro Paschoaletto ◽  
Lorena de Oliveira Pinho ◽  
Piktor Benmamman ◽  
Julia Klaczko
Keyword(s):  
Sexual Selection ◽  
Genital Morphology ◽  
Male And Female ◽  
Female Genital
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