Noncompetitive Gametic Isolation between Sibling Species of Cricket: A Hypothesized Link between Within-Population Incompatibility and Reproductive Isolation between Species

Marshall, Jeremy L.; DiRienzo, Nicholas

doi:10.1155/2012/593438

Cited by 5 publications

(3 citation statements)

References 24 publications

(31 reference statements)

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“…We next measured gametic incompatibilities between females and males from different species in single matings, namely, the inability of a male to induce a female to lay eggs ( Price et al 2001 ; Matute 2010b ; Marshall and DiRienzo 2012 ). We watched single heterospecific and conspecific pairs for 8 h and kept the females that mated successfully for each of the 81 possible hybrid crosses (72 heterospecific + 9 conspecific).…”

Section: Methodsmentioning

confidence: 99%

The Rate of Evolution of Postmating-Prezygotic Reproductive Isolation in Drosophila

Turissini

McGirr

Patel

et al. 2017

Molecular Biology and Evolution

120

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Reproductive isolation is an intrinsic aspect of species formation. For that reason, the identification of the precise isolating traits, and the rates at which they evolve, is crucial to understanding how species originate and persist. Previous work has measured the rates of evolution of prezygotic and postzygotic barriers to gene flow, yet no systematic analysis has studied the rates of evolution of postmating-prezygotic (PMPZ) barriers. We measured the magnitude of two barriers to gene flow that act after mating occurs but before fertilization. We also measured the magnitude of a premating barrier (female mating rate in nonchoice experiments) and two postzygotic barriers (hybrid inviability and hybrid sterility) for all pairwise crosses of all nine known extant species within the melanogaster subgroup. Our results indicate that PMPZ isolation evolves faster than hybrid inviability but slower than premating isolation. Next, we partition postzygotic isolation into different components and find that, as expected, hybrid sterility evolves faster than hybrid inviability. These results lend support for the hypothesis that, in Drosophila, reproductive isolation mechanisms (RIMs) that act early in reproduction (or in development) tend to evolve faster than those that act later in the reproductive cycle. Finally, we tested whether there was evidence for reinforcing selection at any RIM. We found no evidence for generalized evolution of reproductive isolation via reinforcement which indicates that there is no pervasive evidence of this evolutionary process. Our results indicate that PMPZ RIMs might have important evolutionary consequences in initiating speciation and in the persistence of new species.

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Section: Methodsmentioning

confidence: 99%

The Rate of Evolution of Postmating-Prezygotic Reproductive Isolation in Drosophila

Turissini

McGirr

Patel

et al. 2017

Molecular Biology and Evolution

120

View full text Add to dashboard Cite

show abstract

“…1994 ; Howard 1999 ; Price et al. 2001 ; Chang 2004 ), while other species show noncompetitive gametic incompatibility where heterospecific sperm has reduced fertilizing ability compared to conspecific sperm ( Sweigart 2010 ; Ahmed-Braimah and McAllister 2012 ; Marshall and Dirienzo 2012 ; Ahmed-Braimah et al. 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Differences in Postmating Transcriptional Responses between Conspecific and Heterospecific Matings inDrosophila

Ahmed-Braimah

Wolfner

Clark

2020

Molecular Biology and Evolution

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In many animal species, females undergo physiological and behavioral changes after mating. Some of these changes are driven by male-derived seminal fluid proteins, and are critical for fertilization success. Unfortunately, our understanding of the molecular interplay between female and male reproductive proteins remains inadequate. Here we analyze the post-mating response in a Drosophila species that has evolved strong gametic incompatibility with its sister species; D. novamexicana females produce only ~1% fertilized eggs in crosses with D. americana males, compared to ~98% produced in within-species crosses. This incompatibility is likely caused by mismatched male and female reproductive molecules. In this study we use short-read RNA sequencing to examine the evolutionary dynamics of female reproductive genes and the post-mating transcriptome response in crosses within and between species. First, we found that most female reproductive tract genes are slow-evolving compared to the genome average. Second, post-mating responses in con- and heterospecific matings are largely congruent, but heterospecific matings induce expression of additional stress-response genes. Some of those are immunity genes that are activated by the Imd pathway. We also identify several genes in the JAK/STAT signaling pathway that are induced in heterospecific, but not conspecific mating. While this immune response was most pronounced in the female reproductive tract, we also detect it in the female head and ovaries. These results show that the female’s post-mating transcriptome-level response is determined in part by the genotype of the male, and that divergence in male reproductive genes and/or traits can have immunogenic effects on females.

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“…nov. Tex seems to have subsequently diverged from A. socius approximately 24,000 years ago ( Marshall, 2004 ; Marshall, 2007 ). They have previously been shown to be isolated primarily via postmating prezygotic reproductive isolation ( Howard et al, 2002 ; Marshall, 2004 ; Marshall & DiRienzo, 2012 ).…”

Section: Methodsmentioning

confidence: 99%

Sorted gene genealogies and species-specific nonsynonymous substitutions point to putative postmating prezygotic isolation genes inAllonemobiuscrickets

Noh

Marshall

2016

PeerJ

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In the Allonemobius socius complex of crickets, reproductive isolation is primarily accomplished via postmating prezygotic barriers. We tested seven protein-coding genes expressed in the male ejaculate for patterns of evolution consistent with a putative role as postmating prezygotic isolation genes. Our recently diverged species generally lacked sequence variation. As a result, ω-based tests were only mildly successful. Some of our genes showed evidence of elevated ω values on the internal branches of gene trees. In a couple of genes, these internal branches coincided with both species branching events of the species tree, between A. fasciatus and the other two species, and between A. socius and A. sp. nov. Tex. In comparison, more successful approaches were those that took advantage of the varying degrees of lineage sorting and allele sharing among our young species. These approaches were particularly powerful within the contact zone. Among the genes we tested we found genes with genealogies that indicated relatively advanced degrees of lineage sorting across both allopatric and contact zone alleles. Within a contact zone between two members of the species complex, only a subset of genes maintained allelic segregation despite evidence of ongoing gene flow in other genes. The overlap in these analyses was arginine kinase (AK) and apolipoprotein A-1 binding protein (APBP). These genes represent two of the first examples of sperm maturation, capacitation, and motility proteins with fixed non-synonymous substitutions between species-specific alleles that may lead to postmating prezygotic isolation. Both genes express ejaculate proteins transferred to females during copulation and were previously identified through comparative proteomics. We discuss the potential function of these genes in the context of the specific postmating prezygotic isolation phenotype among our species, namely conspecific sperm precedence and the superior ability of conspecific males to induce oviposition in females.

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Noncompetitive Gametic Isolation between Sibling Species of Cricket: A Hypothesized Link between Within-Population Incompatibility and Reproductive Isolation between Species

Cited by 5 publications

References 24 publications

The Rate of Evolution of Postmating-Prezygotic Reproductive Isolation in Drosophila

The Rate of Evolution of Postmating-Prezygotic Reproductive Isolation in Drosophila

Differences in Postmating Transcriptional Responses between Conspecific and Heterospecific Matings inDrosophila

Sorted gene genealogies and species-specific nonsynonymous substitutions point to putative postmating prezygotic isolation genes inAllonemobiuscrickets

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