Proteomic and morphological divergence in micro-allopatric morphotypes of Melarhaphe neritoides in the absence of genetic differentiation

2013 ◽  
Vol 475 ◽  
pp. 145-153 ◽  
Author(s):  
SD García ◽  
AP Diz ◽  
A Sá-Pinto ◽  
E Rolán-Alvarez
Keyword(s):  
Genetic Differentiation ◽  
Morphological Divergence ◽  
Melarhaphe Neritoides

Lack of genetic differentiation between two sympatric species of Astyanax (Characidae:Teleostei) in Lake Catemaco, Mexico

2020 ◽  
Author(s):  
Ignacio Doadrio ◽  
Patricia Ornelas ◽  
Elena G. Gonzalez ◽  
Diethard Tautz
Keyword(s):  
Genetic Differentiation ◽  
Genetic Basis ◽  
Single Gene ◽  
Ecological Speciation ◽  
Sympatric Species ◽  
Morphological Divergence ◽  
Wide Range ◽  
Species Pairs ◽  
Morphological Differences ◽  
Trophic Niches

Abstract Background Fish of the genus Astyanax are known to be able to adapt to a wide range of ecological conditions and are especially known for repeated colorizations of cave systems. In lakes they often occur in species pairs. In the case we study here, they show major morphological differences, such that they were originally classified in different genera. Previous studies have shown that these morphological differences correlate with occupation of different trophic niches. Hence, this could be an example of ecological speciation under sympatric conditions, which predicts that differential ecological adaptation becomes coupled to assortative mating and to the formation of genetically distinct groups that may be called species. We have tested this prediction by typing a set of microsatellites for the two morphs in the lake in comparison to an allopatric population.Results While we find the expected differentiation with respect to the allopatric population, there is a complete lack of genetic differentiation between the two morphs within the lake. Hence, the two morphs in the lake are either in an extremely early phase of speciation or represent two extreme morphotypes derived from a single gene pool.Conclusions Even when we failed to recover the two morphs as reproductively isolated, this model provides a unique opportunity to characterize those factors that would promote the ecological divergence, thus, our lacustrine morphs system gives a unique opportunity to understand the genetic basis of how morphological divergence in the presence of gene flow.

GENETIC DIFFERENTIATION IN DIFFERENT ENDEMIC BOSWELLIA SACRA (BURSERACEAE) POPULATIONS FROM OMAN

2018 ◽  
Vol 51 (1) ◽  
Author(s):  
FAZAL AKBAR ◽  
ABDUL LATIF KHAN ◽  
SYED ABDULLAH GILANI ◽  
AHMED AL-HARRASI ◽  
ABDULLAH M. AL-SADI ◽  
...  
Keyword(s):  
Genetic Differentiation ◽  
Boswellia Sacra

Genetic Differentiation between Color Morphs of a Color-Polymorphic Aphid Macrosiphoniella yomogicola

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Eisuke Hasegawa ◽  
Yuuka Murakami ◽  
So Shiraiwa ◽  
Tatsumi Kudo
Keyword(s):  
Genetic Differentiation ◽  
Color Morphs

Neanderthals and modern humans

2017 ◽  
Author(s):  
Francisco J. Ayala ◽  
Camilo J. Cela-Conde
Keyword(s):  
Genetic Differentiation ◽  
Nuclear Dna ◽  
Homo Sapiens ◽  
Whole Genome ◽  
Upper Palaeolithic ◽  
Modern Humans ◽  
Homo Neanderthalensis ◽  
Modern Mind ◽  
Similarities And Differences ◽  
Mode 3

This chapter deals with the similarities and differences between Homo neanderthalensis and Homo sapiens, by considering genetic, brain, and cognitive evidence. The genetic differentiation emerges from fossil genetic evidence obtained first from mtDNA and later from nuclear DNA. With high throughput whole genome sequencing, sequences have been obtained from the Denisova Cave (Siberia) fossils. Nuclear DNA of a third species (“Denisovans”) has been obtained from the same cave and used to define the phylogenetic relationships among the three species during the Upper Palaeolithic. Archaeological comparisons make it possible to advance a four-mode model of the evolution of symbolism. Neanderthals and modern humans would share a “modern mind” as defined up to Symbolic Mode 3. Whether the Neanderthals reached symbolic Mode 4 remains unsettled.

Redescription and relationships of Pseudothilmanus Pic (Coleoptera: Rhagophthalmidae)—a long-term neglected glow-worm beetle genus from the Himalayas

Zootaxa ◽  
2011 ◽  
Vol 2794 (1) ◽  
pp. 57 ◽  
Author(s):  
ROBIN KUNDRATA ◽  
LADISLAV BOCAK
Keyword(s):  
Morphological Divergence ◽  
Diagnostic Characters ◽  
The Family

Pseudothilmanus Pic, 1918 is redescribed and two species, P. alatus Pic, 1918 and P. marginatus Pic, 1918, are placed in the genus. The subgenus Drilothilmanus Pic, 1918 is synonymized with the nominotypical genus on the basis of low morphological divergence and redundancy in classification. Pseudothilmanus is newly classified in the family Rhagophthalmidae, in contrast to the original placement in Drilidae. Diagnostic characters for Pseudothilmanus and both species placed within the genus are illustrated.

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