scholarly journals Molecular Population Genetics of Male Accessory Gland Proteins in the Drosophila simulans Complex

Genetics ◽  
2004 ◽  
Vol 167 (2) ◽  
pp. 725-735 ◽  
Author(s):  
Andrew D. Kern ◽  
Corbin D. Jones ◽  
David J. Begun
Genetics ◽  
2000 ◽  
Vol 156 (4) ◽  
pp. 1879-1888 ◽  
Author(s):  
David J Begun ◽  
Penn Whitley ◽  
Bridget L Todd ◽  
Heidi M Waldrip-Dail ◽  
Andrew G Clark

Abstract Drosophila seminal proteins have an unusually high rate of molecular sequence evolution, suggesting either a high rate of neutral substitution or rapid adaptive evolution. To further quantify patterns of polymorphism and divergence in genes encoding seminal proteins, also called accessory gland proteins (Acp’s), we conducted a sequencing survey of 10 Acp genes in samples of Drosophila melanogaster and D. simulans (Acp29AB, Acp32CD, Acp33A, Acp36DE, Acp53Ea, Acp62F, Acp63F, Acp76A, Acp95EF, and Acp98AB). Mean heterozygosity at replacement sites in D. simulans was 0.0074 for Acp genes and 0.0013 for a set of 19 non-Acp genes, and mean melanogaster-simulans divergence at replacement sites was 0.0497 for Acp genes and 0.0107 at non-Acp genes. The elevated divergence of Acp genes is thus accompanied by elevated within-species polymorphism. In addition to the already-reported departures of Acp26A, Acp29AB, and Acp70A from neutrality, our data reject neutrality at Acp29AB and Acp36DE in the direction of excess replacements in interspecific comparisons.


2017 ◽  
Vol 99 ◽  
pp. 67-77 ◽  
Author(s):  
Béatrice Denis ◽  
Gaëlle Claisse ◽  
Arnaud Le Rouzic ◽  
Claude Wicker-Thomas ◽  
Gildas Lepennetier ◽  
...  

Genetics ◽  
1992 ◽  
Vol 132 (3) ◽  
pp. 755-770 ◽  
Author(s):  
M Aguadé ◽  
N Miyashita ◽  
C H Langley

Abstract Drosophila males, like males of most other insects, transfer a group of specific proteins to the females during mating. These proteins are produced primarily in the accessory gland and are likely to influence the female's reproduction. The results of studies of DNA sequence polymorphism and divergence in two genes coding for male accessory gland proteins of Drosophila are reported here. The Mst26Aa and Mst26Ab transcription units are tandemly arranged in a approximately 1.6-kb segment in Drosophila sechellia, Drosophila mauritiana and Drosophila simulans as they were reported to be in Drosophila melanogaster. The DNA sequences of 10 alleles from D. melanogaster and one allele each from the three sibling species reveals a high degree of amino acid replacement variation. A substantial part of the variation is due to insertion/deletion differences. Possible functional significance of these amino acid sequence changes is discussed. Statistical analyses based on the neutral theory of molecular evolution show that the distribution of polymorphism over the 1.6-kb region is inconsistent with the pattern of divergence between the species. The amount of 4-cutter restriction map polymorphism in a larger sample of 75 alleles from the same D. melanogaster population is similar to that obtained from the DNA sequence of the 10 alleles (a pairwise average of 0.007 difference per site). The 6-cutter restriction map survey of a 18-kb region containing the Mst26A genes indicates that polymorphism in the region flanking these genes maybe higher. The failure of polymorphisms and divergence in the Mst26A region to conform to the expectations of a simple mutation-drift-equilibrium model indicates that selection in or near this region has played a role in the history of these genes.


Genetics ◽  
1998 ◽  
Vol 150 (3) ◽  
pp. 1079-1089 ◽  
Author(s):  
Montserrat Aguadé

Abstract The Acp26Aa and Acp26Ab genes that code for male accessory gland proteins are tandemly arranged in the species of the Drosophila melanogaster complex. An ∼1.6-kb region encompassing both genes has been sequenced in 10, 24, and 18 lines from Spain, Ivory Coast, and Malawi, respectively; the previously studied 10 lines from North Carolina have also been included in the analyses. A total of 110 nucleotide and 4 length polymorphisms were detected. Silent variation for the whole Acp26A region was slightly higher in African than in non-African populations, while for both genes nonsynonymous variation was similar in all populations studied. Based on Fst estimates no major genetic differentiation was detected between East and West Africa, while in general non-African populations were strongly differentiated from both African populations. Comparison of polymorphism and divergence at synonymous and nonsynonymous sites revealed that directional selection acting on amino acid replacement changes has driven the evolution of the Acp26Aa protein in the last 2.5 myr.


2010 ◽  
Vol 24 (1) ◽  
pp. 91-94 ◽  
Author(s):  
B. SHUTT ◽  
L. STABLES ◽  
F. ABOAGYE-ANTWI ◽  
J. MORAN ◽  
F. TRIPET

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