Mating system ofMicrocebus murinus

Fietz, Joanna

doi:10.1002/(sici)1098-2345(1999)48:2<127::aid-ajp4>3.0.co;2-4

Cited by 65 publications

(37 citation statements)

References 19 publications

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“…Sperm competition has earlier been suggested as an important factor in M. murinus because it is physically indicated by large testis ( Fietz 1999). Heterozygosity might influence the condition or immunocompetence of a male and thus affect the quality or amount of ejaculated sperm (Gage et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Compatibility counts: MHC-associated mate choice in a wild promiscuous primate

2007

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The mechanisms and temporal aspects of mate choice according to genetic constitution are still puzzling. Recent studies indicate that fitness is positively related to diversity in immune genes (MHC). Both sexes should therefore choose mates of high genetic quality and/or compatibility. However, studies addressing the role of MHC diversity in pre-and post-copulatory mate choice decisions in wild-living animals are few. We investigated the impact of MHC constitution and of neutral microsatellite variability on pre-and post-copulatory mate choice in both sexes in a wild population of a promiscuous primate, the grey mouse lemur (Microcebus murinus). There was no support for pre-copulatory male or female mate choice, but our data indicate post-copulatory mate choice that is associated with genetic constitution. Fathers had a higher number of MHC supertypes different from those of the mother than randomly assigned males. Fathers also had a higher amino acid distance to the females' MHC as well as a higher total number of MHC supertypes and a higher degree of microsatellite heterozygosity than randomly assigned males. Female cryptic choice may be the underlying mechanism that operates towards an optimization of the genetic constitution of offspring. This is the first study that provides support for the importance of the MHC constitution in post-copulatory mate choice in non-human primates.

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Section: Discussionmentioning

confidence: 99%

Compatibility counts: MHC-associated mate choice in a wild promiscuous primate

2007

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“…This showed that dn/ds peaks were highest in pairwise sequence comparisons including the gray mouse lemur (Microcebus murinus), the presumably most promiscuous species included in the primate sample ( Fig. 4; Herlyn Zischler 2005a, for the mating system of M. murinus, see, e.g., Fietz 1999). In a recent study, we further investigated how sexual selection influences ZAN sequence evolution.…”

Section: Mrca Of Primatesmentioning

confidence: 96%

The molecular evolution of sperm zonadhesin

Herlyn¹,

Zischler²

2008

Int. J. Dev. Biol.

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Based on pioneering work of Hardy and Garbers, zonadhesin has become one of the best studied sperm ligands in boreoeutherian mammals, both from a biochemical and evolutionary perspective. Zonadhesin is a mosaic-type protein that localizes to the apical head of spermatozoa. In pig, cattle, rabbit and primates, zonadhesin precursor essentially consists of two or three MAM (meprin/A5 antigen/mu receptor tyrosine phosphatase) domains, one mucin-like domain, one incomplete and four complete D domains (homologous to vWFD). Mouse zonadhesin is distinguished from this general pattern by 20 extra partial D3 domains. While concerted evolution drives the divergence of the mucin-like domain in the ortholog comparison, MAM and D domains mainly diverge under the influence of drift and positive selection, both in the paralog and ortholog comparison. As can be seen particularly well within a putative binding region in the most C-terminal MAM domain, positive selection not only causes amino acid exchanges, but also promotes changes in the pattern of predicted posttranslational modification. Moving window and correlation analyses of sequence evolution and sexual body dimorphism further suggest that sexual selection, especially sperm competition, drives zonadhesin divergence. However, considering its zona pellucida avidity, female cryptic choice might as well contribute to zonadhesin evolution. Despite the general tendency for divergence of zonadhesin, conservation by negative selection dominates the evolution of most codon sites. In accordance, the distribution of EGF (epidermal growth factor)-like motifs, DP-doublets, single cysteines and CGLC motifs suggests a wide conservation of processing, folding and oligomerization of zonadhesin in pig, rabbit and primates.

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“…Thus, the idea that both ecological and biogeographic mechanisms maintain species separation was an implicit assumption of the two-species taxonomy. The two-species classification remained stable until the early 1990s, after which time studies on mouse lemur biology increased sharply (48)(49)(50)(51)(52)(53)(54)(55)(56)(57)(58). The discovery that multiple species co-occurred at several localities in the west was one result of this enhanced research activity, thereby yielding an increase in the number of recognized species from two to four (59)(60)(61).…”

Section: Case 4: Adding a Temporal Dimension To Species Diversificatimentioning

confidence: 99%

A multidimensional approach for detecting species patterns in Malagasy vertebrates

Yoder

Olson

Hanley

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

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The biodiversity of Madagascar is extraordinarily distinctive, diverse, and endangered. It is therefore urgent that steps be taken to document, describe, interpret, and protect this exceptional biota. As a collaborative group of field and laboratory biologists, we employ a suite of methodological and analytical tools to investigate the vertebrate portion of Madagascar's fauna. Given that species are the fundamental unit of evolution, where microand macroevolutionary forces converge to generate biological diversity, a thorough understanding of species distribution and abundance is critical for understanding the evolutionary, ecological, and biogeographic forces that have shaped Malagasy vertebrate diversity. We illustrate the means by which we apply Mayr's ''three basic tasks'' of the systematist [Mayr, E. (1942) Systematics and the Origin of Species from the Viewpoint of a Zoologist (Harvard Univ. Press, Cambridge, MA)] to identify, classify, and study the organisms that together constitute Madagascar's vertebrate community. Using field inventory methods, specimen-based studies, and morphological and molecular analyses, we formulate hypotheses of species identity that then serve as the foundation for subsequent studies of biology and history. Our experience, as well as that of other investigators, has shown that much of the vertebrate species diversity in Madagascar is ''cryptic'' for both biological and practical reasons. Beyond issues of cryptic biological diversity, the resolution of species identity in Madagascar has been hampered because of a lack of vouchered comparative material at the population level. Through our activities, we are attempting to remedy these limitations while simultaneously enhancing research capacity in Madagascar.The actual demarcation of species taxa uses morphological, geographical, ecological, behavioral, and molecular information to infer the rank of isolated populations.Ernst Mayr (ref. 1, p.276)

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Mating system ofMicrocebus murinus

Cited by 65 publications

References 19 publications

Compatibility counts: MHC-associated mate choice in a wild promiscuous primate

Compatibility counts: MHC-associated mate choice in a wild promiscuous primate

The molecular evolution of sperm zonadhesin

A multidimensional approach for detecting species patterns in Malagasy vertebrates

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