scholarly journals Against the Odds: Hybrid Zones between Mangrove Killifish Species with Different Mating Systems

Genes ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1486
Author(s):  
Waldir M. Berbel-Filho ◽  
Andrey Tatarenkov ◽  
George Pacheco ◽  
Helder M. V. Espírito-Santo ◽  
Mateus G. Lira ◽  
...  
Keyword(s):  
Mating Systems ◽  
Sympatric Species ◽  
Natural Hybridization ◽  
Hybrid Zones ◽  
Mating Opportunities ◽  
Plant Hybrid ◽  
Two Hybrid ◽  
Selfing Species ◽  
Shed Light ◽  
Mangrove Killifish

Different mating systems are expected to affect the extent and direction of hybridization. Due to the different levels of sexual conflict, the weak inbreeder/strong outbreeder (WISO) hypothesis predicts that gametes from self-incompatible (SI) species should outcompete gametes from self-compatible (SC) ones. However, other factors such as timing of selfing and unilateral incompatibilities may also play a role on the direction of hybridization. In addition, differential mating opportunities provided by different mating systems are also expected to affect the direction of introgression in hybrid zones involving outcrossers and selfers. Here, we explored these hypotheses with a unique case of recent hybridization between two mangrove killifish species with different mating systems, Kryptolebias ocellatus (obligately outcrossing) and K. hermaphroditus (predominantly self-fertilizing) in two hybrid zones in southeast Brazil. Hybridization rates were relatively high (~20%), representing the first example of natural hybridization between species with different mating systems in vertebrates. All F1 individuals were sired by the selfing species. Backcrossing was small, but mostly asymmetrical with the SI parental species, suggesting pattern commonly observed in plant hybrid zones with different mating systems. Our findings shed light on how contrasting mating systems may affect the direction and extent of gene flow between sympatric species, ultimately affecting the evolution and maintenance of hybrid zones.

scholarly journals More than meets the eye: syntopic and morphologically similar mangrove killifish species show different mating systems and patterns of genetic structure along the Brazilian coast

Heredity ◽  
2020 ◽  
Vol 125 (5) ◽  
pp. 340-352
Author(s):  
Waldir M. Berbel-Filho ◽  
Andrey Tatarenkov ◽  
Helder M. V. Espírito-Santo ◽  
Mateus G. Lira ◽  
Carlos Garcia de Leaniz ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Mating Systems ◽  
Brazilian Coast ◽  
Mangrove Killifish

Life history and demography of an uncooperative Australian passerine, the brown thornbill

1999 ◽  
Vol 47 (6) ◽  
pp. 633 ◽  
Author(s):  
David J. Green ◽  
Andrew Cockburn
Keyword(s):  
Phylogenetic Analysis ◽  
Life History ◽  
Breeding Season ◽  
Cooperative Breeding ◽  
Mating Systems ◽  
Survival Rates ◽  
Reproductive Conflict ◽  
Annual Survival ◽  
Shed Light ◽  
C 63

The genus Acanthiza may be important in understanding the evolution of avian mating systems because while brown thornbills, Acanthiza pusilla, are thought to breed only in pairs, a recent phylogenetic analysis suggests that cooperative breeding is the ancestral trait within this genus. We provide a detailed account of the breeding biology of the brown thornbill, confirm that they breed exclusively in pairs, and compare their population demography with what is known for other members of the Pardalotidae. We found that brown thornbills produced small clutches (3 eggs) with a two-day laying interval, had a long incubation period (declining from 19 to 16 days through the season), and had a long breeding season (4.0 months) that allowed females to occasionally raise two successful broods. Brown thornbills, in our study, produced an average of 1.57 fledglings per pair and had relatively high annual survival rates (c. 63%). We found no evidence to suggest that the evolution of pair-breeding within the Pardalotidae is associated with a reduction in annual survival rates, a short breeding season with reduced productivity, or high levels of predation post-fledging. Since there also appear to be no ecological correlates with mating system in the Pardalotidae we suggest that examination of reproductive conflict between parents and young may shed light on the evolution of pairbreeding in this family.

scholarly journals Arthropod communities on hybrid and parental cottonwoods are phylogenetically structured by tree type: Implications for conservation of biodiversity in plant hybrid zones

2017 ◽  
Vol 7 (15) ◽  
pp. 5909-5921 ◽  
Author(s):  
Karl J. Jarvis ◽  
Gerard J. Allan ◽  
Ashley J. Craig ◽  
Rebecca K. Beresic-Perrins ◽  
Gina Wimp ◽  
...  
Keyword(s):  
Hybrid Zones ◽  
Arthropod Communities ◽  
Plant Hybrid ◽  
Conservation Of Biodiversity ◽  
Tree Type

scholarly journals Towards a protein interaction map of potyviruses: protein interaction matrixes of two potyviruses based on the yeast two-hybrid system

2001 ◽  
Vol 82 (4) ◽  
pp. 935-939 ◽  
Author(s):  
Deyin Guo ◽  
Minna-Liisa Rajamäki ◽  
Mart Saarma ◽  
Jari P. T. Valkonen
Keyword(s):  
Hybrid System ◽  
Protein Interaction ◽  
Protein Interactions ◽  
Yeast Two Hybrid ◽  
Potato Virus A ◽  
Yeast Two Hybrid System ◽  
Multiple Protein ◽  
Interaction Map ◽  
Two Hybrid ◽  
Shed Light

A map for the interactions of the major proteins from Potato virus A (PVA) and Pea seed-borne mosaic virus (PSbMV) (members of the genus Potyvirus, family Potyviridae) was generated using the yeast two-hybrid system (YTHS). Interactions were readily detected with five PVA protein combinations (HC–HC, HC–CI, VPg–VPg, NIa–NIb and CP–CP) and weak but reproducible interactions were detected for seven additional combinations (P1–CI, P3–NIb, NIaPro–NIb, VPg–NIa, VPg–NIaPro, NIaPro–NIa and NIa–NIa). In PSbMV, readily detectable interactions were found in five protein combinations (HC–HC, VPg–VPg, VPg–NIa, NIa–NIa and NIa–NIb) and weaker but reproducible interactions were detected for three additional combinations (P3–NIa, NIa–NIaPro and CP–CP). The self-interactions of HC, VPg, NIa and CP and the interactions of VPg–NIa, NIa–NIaPro and NIa–NIb were, therefore, common for the two potyviruses. The multiple protein interactions revealed in this study shed light on the co-ordinated functions of potyviral proteins involved in virus movement and replication.

scholarly journals Altitudinal gradients, plant hybrid zones and evolutionary novelty

2014 ◽  
Vol 369 (1648) ◽  
pp. 20130346 ◽  
Author(s):  
Richard J. Abbott ◽  
Adrian C. Brennan
Keyword(s):  
Gene Flow ◽  
Mount Etna ◽  
Hybrid Zones ◽  
Evolutionary Novelty ◽  
Altitudinal Gradients ◽  
Interspecific Gene Flow ◽  
Adaptive Introgression ◽  
Local Environments ◽  
The Face ◽  
Plant Hybrid

Altitudinal gradients are characterized by steep changes of the physical and biotic environment that present challenges to plant adaptation throughout large parts of the world. Hybrid zones may form where related species inhabit different neighbouring altitudes and can facilitate interspecific gene flow and potentially the breakdown of species barriers. Studies of such hybrid zones can reveal much about the genetic basis of adaptation to environmental differences stemming from changes in altitude and the maintenance of species divergence in the face of gene flow. Furthermore, owing to recombination and transgressive effects, such hybrid zones can be sources of evolutionary novelty. We document plant hybrid zones associated with altitudinal gradients and emphasize similarities and differences in their structure. We then focus on recent studies of a hybrid zone between two Senecio species that occur at high and low altitude on Mount Etna, Sicily, showing how adaptation to local environments and intrinsic selection against hybrids act to maintain it. Finally, we consider the potential of altitudinal hybrid zones for generating evolutionary novelty through adaptive introgression and hybrid speciation. Examples of homoploid hybrid species of Senecio and Pinus that originated from altitudinal hybrid zones are discussed.

scholarly journals Sharing mating opportunities by coalition males in stump-tailed macaques: elucidation of ecological mechanism by diversion of PvS model

2020 ◽  
Author(s):  
Aru Toyoda ◽  
Tamaki Maruhashi ◽  
Suchinda Malaivijitnond ◽  
Hiroki Koda ◽  
Yasuo Ihara
Keyword(s):  
Evolutionary Theory ◽  
Social Systems ◽  
Dominant Male ◽  
Large Numbers ◽  
Mathematical Simulations ◽  
Mating Opportunities ◽  
Ecological Mechanism ◽  
The Cost ◽  
Socioecological Models ◽  
Shed Light

ABSTRACTCooperation, or the act of benefiting others at the cost of the benefactor’s fitness, has been a central issue in evolutionary theory. Non-human animals sometimes show coalitions or male-male “cooperation” to confront a male rival and challenge the rank hierarchy. Here we observed novel types of coalitions in wild stump-tailed macaques (Macaca arctoides); multiple males actively shared the mating opportunities, i.e., a male copulated with a female, while his ally waited his turn and guarded them. Our mathematical simulations revealed that lack of estrous signs, as well as large numbers of males in a group, possibly enhance facultative sharing of females. This is the first demonstration of the sharing of females in non-human primates., and shed light on the evolutionary theory of cooperation. Overall, our novel observations have revised the existing socioecological models in primate social systems. The characteristics of stump-tailed macaque societies now range from despotism to egalitarianism, and from monopolization of females by a dominant male to male-male coalition coupled with active sharing of mating opportunities, which increases the chances of reproductive success.

scholarly journals Reproductive performance in two hybrid zones between chromosome races of the common shrew Sorex araneus in Poland

2000 ◽  
Vol 45 ◽  
pp. 69-78 ◽  
Author(s):  
Agata Banaszek ◽  
Stanisław Fedyk ◽  
Katarzyna A. Szałaj ◽  
Włodzimierz Chętnicki
Keyword(s):  
Reproductive Performance ◽  
Common Shrew ◽  
Sorex Araneus ◽  
Hybrid Zones ◽  
Chromosome Races ◽  
The Common ◽  
Common Shrew Sorex Araneus ◽  
Two Hybrid

scholarly journals Algal Sex Determination and the Evolution of Anisogamy

2019 ◽  
Vol 73 (1) ◽  
pp. 267-291 ◽  
Author(s):  
James Umen ◽  
Susana Coelho
Keyword(s):  
Sex Determination ◽  
Sexual Reproduction ◽  
Green Algae ◽  
Life Histories ◽  
Mating Systems ◽  
Chromosome Evolution ◽  
Sex Chromosome ◽  
Photosynthetic Eukaryotes ◽  
Sex Determination Mechanisms ◽  
Shed Light

Algae are photosynthetic eukaryotes whose taxonomic breadth covers a range of life histories, degrees of cellular and developmental complexity, and diverse patterns of sexual reproduction. These patterns include haploid- and diploid-phase sex determination, isogamous mating systems, and dimorphic sexes. Despite the ubiquity of sexual reproduction in algae, their mating-type-determination and sex-determination mechanisms have been investigated in only a limited number of representatives. These include volvocine green algae, where sexual cycles and sex-determining mechanisms have shed light on the transition from mating types to sexes, and brown algae, which are a model for UV sex chromosome evolution in the context of a complex haplodiplontic life cycle. Recent advances in genomics have aided progress in understanding sexual cycles in less-studied taxa including ulvophyte, charophyte, and prasinophyte green algae, as well as in diatoms.

scholarly journals The genus Cuernavaca (Hemiptera: Dictyopharidae), associated with Pontederiaceae in South America, with redescription and new records of C. inexacta (Walker)

2020 ◽  
Vol 60 ◽  
pp. e20206011
Author(s):  
Ana María Marino de Remes Lenicov ◽  
María Cristina Hernádez ◽  
Alejandro Joaquín Sosa ◽  
Marina Inés Oleiro
Keyword(s):  
South America ◽  
New Records ◽  
Sympatric Species ◽  
Peruvian Amazon ◽  
Ecological Studies ◽  
New Host ◽  
Water Hyacinths ◽  
Northeastern Argentina ◽  
Shed Light ◽  
New Host Records

The aim of this paper is to shed light on the boundaries of two sympatric species of Cuernavaca, C. inexacta and C. longula, to enable further ecological studies. Species in this genus are associated with water hyacinths in wetlands of Northeastern Argentina (Paraná-Paraguay waterway system) and the Peruvian Amazon. This work lists new host records for Cuernavaca, which include Pontederia crassipes, P. cordata, P. subovata and P. rotundifolia (Pontederiaceae). A redescription for C. inexacta with new diagnostic genitalic features is also provided, as well as an updated identification key and a distribution map. The genus is distributed throughout Central and South America, reaching north and central Argentina in its southernmost distribution.

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