scholarly journals Effect of Male Diet on Accessory Gland Protein and Sperm Traits in D.melanogaster

2020 ◽  
Vol 8 (6) ◽  
pp. 506-511
Author(s):  
Krishnan Anitha ◽  
Mysore Siddaiah Krishna
Keyword(s):  
Accessory Gland ◽  
Accessory Gland Protein ◽  
Sperm Traits

scholarly journals Male Accessory Gland Protein Reduces Egg Laying in a Simultaneous Hermaphrodite

PLoS ONE ◽  
2010 ◽  
Vol 5 (4) ◽  
pp. e10117 ◽  
Author(s):  
Joris M. Koene ◽  
Wiebe Sloot ◽  
Kora Montagne-Wajer ◽  
Scott F. Cummins ◽  
Bernard M. Degnan ◽  
...  
Keyword(s):  
Accessory Gland ◽  
Egg Laying ◽  
Simultaneous Hermaphrodite ◽  
Male Accessory Gland ◽  
Accessory Gland Protein

scholarly journals Positive Selection Drives the Evolution of the Acp29AB Accessory Gland Protein in Drosophila

Genetics ◽  
1999 ◽  
Vol 152 (2) ◽  
pp. 543-551 ◽  
Author(s):  
Montserrat Aguadé
Keyword(s):  
Balancing Selection ◽  
Accessory Gland ◽  
Synonymous Polymorphism ◽  
Length Polymorphisms ◽  
Nucleotide Sequence Variation ◽  
African Populations ◽  
Order Of Magnitude ◽  
Pattern Of Variation ◽  
Accessory Gland Protein ◽  
Flanking Regions

Abstract Nucleotide sequence variation at the Acp29AB gene region has been surveyed in Drosophila melanogaster from Spain (12 lines), Ivory Coast (14 lines), and Malawi (13 lines) and in one line of D. simulans. The ∼1.7-kb region studied encompasses the Acp29AB gene that codes for a male accessory gland protein and its flanking regions. Seventy-seven nucleotide and 8 length polymorphisms were detected. Nonsynonymous polymorphism was an order of magnitude lower than synonymous polymorphism, but still high relative to other non-sex-related genes. In D. melanogaster variation at this region revealed no major genetic differentiation between East and West African populations, while differentiation was highly significant between the European and the two African populations. Comparison of polymorphism and divergence at synonymous and nonsynonymous sites showed an excess of fixed nonsynonymous changes, which indicates that the evolution of the Acp29AB protein has been driven by directional selection at least after the split of the D. melanogaster and D. simulans lineages. The pattern of variation in extant populations of D. melanogaster favors a scenario where the fixation of advantageous replacement substitutions occurred in the early stages of speciation and balancing selection is maintaining variation in this species.

scholarly journals Variation in sperm displacement and its association with accessory gland protein loci in Drosophila melanogaster.

Genetics ◽  
1995 ◽  
Vol 139 (1) ◽  
pp. 189-201 ◽  
Author(s):  
A G Clark ◽  
M Aguadé ◽  
T Prout ◽  
L G Harshman ◽  
C H Langley
Keyword(s):  
Reproductive Tract ◽  
Seminal Fluid ◽  
Glucose Dehydrogenase ◽  
Natural Populations ◽  
Fertilization Success ◽  
Accessory Gland ◽  
Male Reproductive Success ◽  
Sperm Displacement ◽  
Naturally Occurring ◽  
Accessory Gland Protein

Abstract Genes that influence mating and/or fertilization success may be targets for strong natural selection. If females remate frequently relative to the duration of sperm storage and rate of sperm use, sperm displacement may be an important component of male reproductive success. Although it has long been known that mutant laboratory stocks of Drosophila differ in sperm displacement, the magnitude of the naturally occurring genetic variation in this character has not been systematically quantified. Here we report the results of a screen for variation in sperm displacement among 152 lines of Drosophilia melanogaster that were made homozygous for second and/or third chromosomes recovered from natural populations. Sperm displacement was assayed by scoring the progeny of cn;bw females that had been mated sequentially to cn;bw and tested males in either order. Highly significant differences were seen in both the ability to displace sperm that is resident in the female's reproductive tract and in the ability to resist displacement by subsequent sperm. Most lines exhibited nearly complete displacement, having nearly all progeny sired by the second male, but several lines had as few as half the progeny fathered by the second male. Lines that were identified in the screen for naturally occurring variation in sperm displacement were also characterized for single-strand conformation polymorphisms (SSCP) at seven accessory gland protein (Acp) genes, Glucose dehydrogenase (Gld), and Esterase-6 (Est-6). Acp genes encode proteins that are in some cases known to be transmitted to the female in the seminal fluid and are likely candidates for genes that might mediate the phenomenon of sperm displacement. Significant associations were found between particular Acp alleles at four different loci (Acp26Aa/Ab, Acp29B, Acp36DE and Acp53E) and the ability of males to resist displacement by subsequent sperm. There was no correlation between the ability to displace resident sperm and the ability to resist being displaced by subsequent sperm. This lack of correlation, and the association of Acp alleles with resisting subsequent sperm only, suggests that different mechanisms mediate the two components of sperm displacement.

scholarly journals Cross-Species Comparison of Drosophila Male Accessory Gland Protein Genes

Genetics ◽  
2005 ◽  
Vol 171 (1) ◽  
pp. 131-143 ◽  
Author(s):  
J. L. Mueller ◽  
K. Ravi Ram ◽  
L. A. McGraw ◽  
M. C. Bloch Qazi ◽  
E. D. Siggia ◽  
...  
Keyword(s):  
Accessory Gland ◽  
Species Comparison ◽  
Male Accessory Gland ◽  
Accessory Gland Protein ◽  
Cross Species Comparison

Interactions with ectoparasitic mites induce host metabolic and immune responses in flies at the expense of reproduction-associated factors

Parasitology ◽  
2020 ◽  
Vol 147 (11) ◽  
pp. 1196-1205 ◽  
Author(s):  
Joshua B. Benoit ◽  
Joy Bose ◽  
Samuel T. Bailey ◽  
Michal Polak
Keyword(s):  
Immune Responses ◽  
Accessory Gland ◽  
Mite Infestation ◽  
Nutrient Metabolism ◽  
Transcript Levels ◽  
Host Immune Responses ◽  
Behavioural Avoidance ◽  
Trade Offs ◽  
Transcriptional Changes ◽  
Accessory Gland Protein

AbstractParasites cause harm to their hosts and represent pervasive causal agents of natural selection. Understanding host proximate responses during interactions with parasites can help predict which genes and molecular pathways are targets of this selection. In the current study, we examined transcriptional changes arising from interactions between Drosophila melanogaster and their naturally occurring ectoparasitic mite, Gamasodes queenslandicus. Shifts in host transcript levels associated with behavioural avoidance revealed the involvement of genes underlying nutrient metabolism. These genetic responses were reflected in altered body lipid and glycogen levels in the flies. Mite infestation triggered a striking immune response, while male accessory gland protein transcript levels were simultaneously reduced, suggesting a trade-off between host immune responses to parasite challenge and reproduction. Comparison of transcriptional analyses during mite infestation to those during nematode and parasitoid attack identified host genes similarly expressed in flies during these interactions. Validation of the involvement of specific genes with RNA interference lines revealed candidates that may directly mediate fly–ectoparasite interactions. Our physiological and molecular characterization of the Drosophila–Gamasodes interface reveals new proximate mechanisms underlying host–parasite interactions, specifically host transcriptional shifts associated with behavioural avoidance and infestation. The results identify potential general mechanisms underlying host resistance and evolutionarily relevant trade-offs.

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