scholarly journals A morphological trait involved in reproductive isolation between Drosophila sister species is sensitive to temperature

2021 ◽  
Author(s):  
Alexandre E. Peluffo ◽  
Mehdi Hamdani ◽  
Alejandra Vargas‐Valderrama ◽  
Jean R. David ◽  
François Mallard ◽  
...  
Keyword(s):  
Reproductive Isolation ◽  
Morphological Trait ◽  
Sister Species

Introgression between non-sister species of honeyeaters (Aves: Meliphagidae) several million years after speciation

2019 ◽  
Vol 128 (3) ◽  
pp. 583-591
Author(s):  
Leo Joseph ◽  
Alex Drew ◽  
Ian J Mason ◽  
Jeffrey L Peters
Keyword(s):  
Gene Flow ◽  
Reproductive Isolation ◽  
Sex Chromosomes ◽  
Common Ancestor ◽  
Sister Species ◽  
Species Boundaries ◽  
North Eastern ◽  
The City

Abstract We reassessed whether two parapatric non-sister Australian honeyeater species (Aves: Meliphagidae), varied and mangrove honeyeaters (Gavicalis versicolor and G. fasciogularis, respectively), that diverged from a common ancestor c. 2.5 Mya intergrade in the Townsville area of north-eastern Queensland. Consistent with a previous specimen-based study, by using genomics methods we show one-way gene flow for autosomal but not Z-linked markers from varied into mangrove honeyeaters. Introgression barely extends south of the area of parapatry in and around the city of Townsville. While demonstrating the long-term porosity of species boundaries over several million years, our data also suggest a clear role of sex chromosomes in maintaining reproductive isolation.

scholarly journals The roles of time and ecology in the continental radiation of the Old World leaf warblers ( Phylloscopus and Seicercus )

2010 ◽  
Vol 365 (1547) ◽  
pp. 1749-1762 ◽  
Author(s):  
Trevor D. Price
Keyword(s):  
Reproductive Isolation ◽  
Ecological Factors ◽  
Critical Factor ◽  
Sympatric Species ◽  
Sister Species ◽  
Ecological Change ◽  
Old World ◽  
Stage Process ◽  
Leaf Warblers ◽  
Habitat Tracking

Many continental sister species are allopatric or parapatric, ecologically similar and long separated, of the order of millions of years. Sympatric, ecologically differentiated, species, are often even older. This raises the question of whether build-up of sympatric diversity generally follows a slow process of divergence in allopatry, initially without much ecological change. I review patterns of speciation among birds belonging to the continental Eurasian Old World leaf warblers ( Phylloscopus and Seicercus ). I consider speciation to be a three-stage process (range expansions, barriers to gene flow, reproductive isolation) and ask how ecological factors at each stage have contributed to speciation, both among allopatric/parapatric sister species and among those lineages that eventually led to currently sympatric species. I suggest that time is probably the critical factor that leads to reproductive isolation between sympatric species and that a strong connection between ecological divergence and reproductive isolation remains to be established. Besides reproductive isolation, ecological factors can affect range expansions (e.g. habitat tracking) and the formation of barriers (e.g. treeless areas are effective barriers for warblers). Ecological factors may often limit speciation on continents because range expansions are difficult in ‘ecologically full’ environments.

scholarly journals Meiotic drive is associated with sexual incompatibility in Neurospora

2020 ◽  
Author(s):  
Aaron Vogan ◽  
Jesper Svedberg ◽  
Magdalena Grudzinska-Sterno ◽  
Hanna Johannesson
Keyword(s):  
Molecular Markers ◽  
New Zealand ◽  
Reproductive Isolation ◽  
Evolutionary History ◽  
Meiotic Drive ◽  
Sister Species ◽  
Independent Evolutionary History

AbstractMeiotic drive is the phenomenon whereby selfish elements bias their transmission to progeny at ratios above 50:50, violating Mendel’s law of equal segregation. The model fungus Neurospora carries three different meiotic drivers, called Spore killers. Two of these, Sk-2 and Sk-3, are multilocus spore killers that constitute large haplotypes and are found in the species N. intermedia. Here we used molecular markers to determine that all N. intermedia isolates from New Zealand in fact belong to the sister species N. metzenbergii. Additionally, we use laboratory crosses to demonstrate that Sk-2 and Sk-3 are involved in sexual incompatibility between N. intermedia and N. metzenbergii.. Our experiments revealed that while crosses between these two species normally produced viable progeny at appreciable rates, when strains of N. intermedia carried Sk-2 or Sk-3 the proportion of viable progeny dropped substantially and in some crosses, no viable progeny were observed. Backcrossings supported that the incompatibility is tightly linked to the Sk haplotype. Finally, it appears that Sk-2 and Sk-3 have accumulated different incompatibility phenotypes when crossed with N. metzenbergii strains, consistent with their independent evolutionary history. This research illustrates how meiotic drive can contribute to reproductive isolation between populations, and thereby speciation.

scholarly journals A morphological trait involved in reproductive isolation between Drosophila sister species is sensitive to temperature

2020 ◽  
Author(s):  
Alex E. Peluffo ◽  
Mehdi Hamdani ◽  
Alejandra Vargas-Valderrama ◽  
Jean R. David ◽  
François Mallard ◽  
...  
Keyword(s):  
Reproductive Isolation ◽  
Related Species ◽  
Male Genitalia ◽  
Automatic Measurement ◽  
Sister Species ◽  
Effect Of Temperature ◽  
Closely Related Species ◽  
Genital Structure ◽  
Lower Temperature ◽  
Male Genital

AbstractMale genitalia are usually extremely divergent between closely related species, but relatively constant within one species. Here we examine the effect of temperature on the shape of the ventral branches, a male genital structure involved in reproductive isolation, in the sister species Drosophila santomea and D. yakuba. We designed a semi-automatic measurement pipeline that can reliably identify curvatures and landmarks based on manually digitized contours of the ventral branches. With this method, we observed that temperature does not affect ventral branches in D. yakuba but that in D. santomea ventral branches tend to morph into a D. yakuba-like shape at lower temperature. Our results suggest that speciation of D. santomea and D. yakuba was associated with a change in genitalia plasticity.

scholarly journals Conspecific sperm precedence is reinforced, but postcopulatory sexual selection weakened, in sympatric populations of Drosophila

2019 ◽  
Vol 286 (1899) ◽  
pp. 20182535 ◽  
Author(s):  
Dean M. Castillo ◽  
Leonie C. Moyle
Keyword(s):  
Sexual Selection ◽  
Reproductive Isolation ◽  
Competitive Ability ◽  
Reproductive Traits ◽  
Sister Species ◽  
Direct Selection ◽  
Sympatric Populations ◽  
Collateral Effect ◽  
Selection For ◽  
The Cost

Sexual selection can accelerate speciation by driving the evolution of reproductive isolation, but forces driving speciation could also reciprocally feedback on sexual selection. This might be particularly important in the context of ‘reinforcement’, where selection acts directly to increase prezygotic barriers to reduce the cost of heterospecific matings. Using assays of sperm competition within and between two sister species, we show a signature of reinforcement where these species interact: populations of Drosophila pseudoobscura that co-occur with sister species D. persimilis have an elevated ability to outcompete heterospecific sperm, consistent with selection for increased postcopulatory isolation. We also find these D. pseudoobscura populations have decreased sperm competitive ability against conspecifics, reducing the opportunity for sexual selection within these populations. Our findings demonstrate that direct selection to increase reproductive isolation against other species can compromise the efficacy of sexual selection within species, a collateral effect of reproductive traits responding to heterospecific interactions.

scholarly journals Genetic architecture of a key reproductive isolation trait differs between sympatric and non-sympatric sister species of Lake Victoria cichlids

2020 ◽  
Vol 287 (1924) ◽  
pp. 20200270
Author(s):  
Anna F. Feller ◽  
Marcel P. Haesler ◽  
Catherine L. Peichel ◽  
Ole Seehausen
Keyword(s):  
Gene Flow ◽  
Reproductive Isolation ◽  
Related Species ◽  
Genetic Architecture ◽  
Lake Victoria ◽  
Sympatric Species ◽  
Sister Species ◽  
Species Pair ◽  
Closely Related Species ◽  
Nuptial Coloration

One hallmark of the East African cichlid radiations is the rapid evolution of reproductive isolation that is robust to full sympatry of many closely related species. Theory predicts that species persistence and speciation in sympatry with gene flow are facilitated if loci of large effect or physical linkage (or pleiotropy) underlie traits involved in reproductive isolation. Here, we investigate the genetic architecture of a key trait involved in behavioural isolation, male nuptial coloration, by crossing two sister species pairs of Lake Victoria cichlids of the genus Pundamilia and mapping nuptial coloration in the F2 hybrids. One is a young sympatric species pair, representative of an axis of colour motif differentiation, red-dorsum versus blue, that is highly recurrent in closely related sympatric species. The other is a species pair representative of colour motifs, red-chest versus blue, that are common in allopatric but uncommon in sympatric closely related species. We find significant quantitative trait loci (QTLs) with moderate to large effects (some overlapping) for red and yellow in the sympatric red-dorsum × blue cross, whereas we find no significant QTLs in the non-sympatric red-chest × blue cross. These findings are consistent with theory predicting that large effect loci or linkage/pleiotropy underlying mating trait differentiation could facilitate speciation and species persistence with gene flow in sympatry.

scholarly journals Genetic Dissection of a Major Anthocyanin QTL Contributing to Pollinator-Mediated Reproductive Isolation Between Sister Species of Mimulus

Genetics ◽  
2013 ◽  
Vol 194 (1) ◽  
pp. 255-263 ◽  
Author(s):  
Yao-Wu Yuan ◽  
Janelle M. Sagawa ◽  
Riane C. Young ◽  
Brian J. Christensen ◽  
Harvey D. Bradshaw
Keyword(s):  
Reproductive Isolation ◽  
Sister Species ◽  
Genetic Dissection

scholarly journals INTRINSIC REPRODUCTIVE ISOLATION BETWEEN TWO SISTER SPECIES OF DROSOPHILA

Evolution ◽  
2009 ◽  
Vol 64 (4) ◽  
pp. 903-920 ◽  
Author(s):  
Daniel R. Matute ◽  
Jerry A. Coyne
Keyword(s):  
Reproductive Isolation ◽  
Sister Species

Reproductive isolation between sympatric sister species, Mussaenda kwangtungensis and M. pubescens var. alba

2015 ◽  
Vol 57 (10) ◽  
pp. 859-870 ◽  
Author(s):  
Zhonglai Luo ◽  
Tingting Duan ◽  
Shuai Yuan ◽  
Shi Chen ◽  
Xiufeng Bai ◽  
...  
Keyword(s):  
Reproductive Isolation ◽  
Sister Species
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