The evolution of sperm polymorphism in the drosophila group


Is there heteromorphism in scorpions Arachnida, Scorpiones? Mating system evolution in sperm-heteromorphic Drosophila. Furthermore, we used a DNA-specific dye bisbenzimide and sperm-specific antibodies to ask if both sperm types fertilize eggs in Drosophila pseudoobscura. Sperm heteromorphism therefore appears to be a phylogenetic trait that evolved uniquely in the obscura group. The range of the distribution is of the same order of magnitude regardless of the male or population concerned. However, if this trait is adaptive, the true advantage of heteromorphic sperm packages in C.
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The mean and variance of the number of segregating sites since the last hitchhiking event. Because male-biased genes are known to be underrepresented on the X chromosome P arisi et al. Identifying the factors that modulate the sperm hyper-activation machinery promises to provide insights into the molecular mechanisms used by the sexes to manipulate sperm behavior to their own advantage. National Center for Biotechnology Information , U. Genetic analysis of stellate elements of Drosophila melanogaster. Sperm heteromorphism occurs in the obscura group, a monophyletic clade in the genus Drosophila that contains 35 described species Barrio and Ayala To further identify the lineages that experienced adaptive evolution, we polarized our MK test using D.
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(PDF) Functional nonequivalence of sperm in Drosophila pseudoobscura

This can explain the observed discordance in selection parameter between the two methods. The effective number of codons used in a gene. Despite the critical role of the CatSper complex in sperm hyper-activation across a wide variety of metazoa, little is known about its molecular evolution. In summary, we propose that the increased signal of positive selection seen for genes with sex-biased expression results from the combined action of sexual selection and intersexual coevolution.
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The evolution of sperm polymorphism in the drosophila group
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The evolution of sperm polymorphism in the drosophila group
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Polymorphism in the sperm heteromophic species of the Drosophila obscura group

The evolution of sperm polymorphism in the drosophila group



Description: Immune gene diversity in archaic and present-day humans. Together, our results add sperm hyper-activation channels to the class of fast evolving reproductive proteins and provide insights into the mechanisms used by the sexes to manipulate sperm behavior. For 25 genes, we were unable to obtain a PCR product from D. Molecular structure of a portion of one of the analyzed Sdic repeats showing the three key promoter elements created by the fusion of the 3' UTR of AnnX and intron 3 of Cdic.

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