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.

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.

A new endemic family of New Zealand passerine birds: adding heat to a biodiversity hotspot

2007 ◽  
Vol 55 (2) ◽  
pp. 73 ◽  
Author(s):  
Amy Driskell ◽  
Les Christidis ◽  
B. J. Gill ◽  
Walter E. Boles ◽  
F. Keith Barker ◽  
...  
Keyword(s):  
New Zealand ◽  
Evolutionary History ◽  
Divergence Time ◽  
Biodiversity Hotspot ◽  
Passerine Birds ◽  
New Family ◽  
Close Relationship ◽  
History Of ◽  
Anthornis Melanura ◽  
Notiomystis Cincta

The results of phylogenetic analysis of two molecular datasets sampling all three endemic New Zealand ‘honeyeaters’ (Prosthemadera novaeseelandiae, Anthornis melanura and Notiomystis cincta) are reported. The undisputed relatedness of the first two species to other honeyeaters (Meliphagidae), and a close relationship between them, are demonstrated. However, our results confirm that Notiomystis is not a honeyeater, but is instead most closely related to the Callaeidae (New Zealand wattlebirds) represented by Philesturnus carunculatus in our study. An estimated divergence time for Notiomystis and Philesturnus of 33.8 mya (Oligocene) suggests a very long evolutionary history of this clade in New Zealand. As a taxonomic interpretation of these data we place Notiomystis in a new family of its own which takes the name Notiomystidae. We expect this new phylogenetic and taxonomic information to assist policy decisions for the conservation of this rare bird.

Incongruence between morphological and molecular markers in the butterfly genusZizina(Lepidoptera: Lycaenidae) in New Zealand

2012 ◽  
Vol 38 (1) ◽  
pp. 151-163 ◽  
Author(s):  
MARK GILLESPIE ◽  
STEVE D. WRATTEN ◽  
ROB CRUICKSHANK ◽  
BENJAMIN H. WISEMAN ◽  
GEORGE W. GIBBS
Keyword(s):  
Molecular Markers ◽  
New Zealand

Introgression and selection shaped the evolutionary history of sympatric sister-species of coral reef fishes (genus:Haemulon)

2016 ◽  
Vol 26 (2) ◽  
pp. 639-652 ◽  
Author(s):  
Moisés A. Bernal ◽  
Michelle R. Gaither ◽  
W. Brian Simison ◽  
Luiz A. Rocha
Keyword(s):  
Coral Reef ◽  
Evolutionary History ◽  
Reef Fishes ◽  
Coral Reef Fishes ◽  
Sister Species ◽  
History Of

Rautangaroa, a new genus of feather star (Echinodermata, Crinoidea) from the Oligocene of New Zealand

2018 ◽  
Vol 92 (5) ◽  
pp. 872-882 ◽  
Author(s):  
Tomasz K. Baumiller ◽  
R. Ewan Fordyce
Keyword(s):  
New Zealand ◽  
Detailed Analysis ◽  
Evolutionary History ◽  
New Genus ◽  
Intact Specimen ◽  
History Of ◽  
Recovered Material ◽  
Feather Star ◽  
Established Genus

AbstractWe describe a nearly complete, and thus extremely rare, feather star (Crinoidea, Comatulida) from Oligocene strata of North Otago/South Canterbury, New Zealand. A detailed analysis of this specimen, as well as newly recovered material and previously described fragmentary remains from nearby contemporaneous sedimentary units, in addition to relevant historical specimens, lead us to conclude that it cannot be placed in any currently established genus. A new genus,Rautangaroa,is proposed to accommodate it.This intact specimen ofRautangaroa aotearoa(Eagle, 2007), provides rare data on the morphology of arms and cirri. It represents the first example of arm autotomy and regeneration in a fossil feather star and thus has bearing on the importance of predation to the evolutionary history of this group.UUID:http://zoobank.org/c050dafd-93ba-4334-b11b-59209aabb588

Systematics of Berberis sect. Wallichianae (Berberidaceae) of Taiwan and Luzon with description of three new species, B. schaaliae, B. ravenii, and B. pengii

Phytotaxa ◽  
2014 ◽  
Vol 184 (2) ◽  
pp. 61 ◽  
Author(s):  
Chih-Chieh Yu ◽  
Kuo-Fang Chung
Keyword(s):  
New Species ◽  
Evolutionary History ◽  
Phylogenetic Analyses ◽  
Molecular Data ◽  
Close Relative ◽  
Multivariate Statistical Analyses ◽  
Multivariate Statistical ◽  
Taxonomic History ◽  
Three New Species ◽  
Independent Evolutionary History

Berberis sect. Wallichianae are species of evergreen shrubs that in Taiwan are found in subalpine and montane-temperate areas and which have a notoriously controversial taxonomic history. Based on multivariate statistical analyses of morphometric data and an explicitly stated species criterion, the taxonomy of the group in Taiwan and its close relative in Luzon (B. barandana) is revised and their endemicity is evaluated by molecular data. In addition to the six species recognized in the Flora of Taiwan, 2nd ed. (i.e., B. aristatoserrulata, B. brevisepala, B. chingshuiensis, B. kawakamii, B. mingetsensis, and B. tarokoensis), B. hayatana (synonymized under B. mingetsensis) and B. nantoensis (synonymized under B. brevisepala) are reinstated, and three new species (B. pengii, B. ravenii, and B. schaaliae) are described and illustrated. Phylogenetic analyses using three chloroplast DNA sequence regions (rbcL, ycf6-psbM, and psbA-trnH) place all Taiwanese species and B. barandana in a strongly supported clade derived from within the continental Asian species of sect. Wallichianae, indicating their independent evolutionary history and supporting their endemic status.

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