scholarly journals CORRELATED EVOLUTION OF SEXUAL DIMORPHISM AND MALE DIMORPHISM IN A CLADE OF NEOTROPICAL HARVESTMEN

Evolution ◽  
2014 ◽  
Vol 68 (6) ◽  
pp. 1671-1686 ◽  
Author(s):  
Bruno A. Buzatto ◽  
Joseph L. Tomkins ◽  
Leigh W. Simmons ◽  
Glauco Machado
Keyword(s):  
Sexual Dimorphism ◽  
Male Dimorphism ◽  
Correlated Evolution

Selection on learning performance results in the correlated evolution of sexual dimorphism in life history

Evolution ◽  
2016 ◽  
Vol 70 (2) ◽  
pp. 342-357 ◽  
Author(s):  
Martyna K. Zwoinska ◽  
Martin I. Lind ◽  
Maria Cortazar-Chinarro ◽  
Mark Ramsden ◽  
Alexei A. Maklakov
Keyword(s):  
Life History ◽  
Sexual Dimorphism ◽  
Learning Performance ◽  
Correlated Evolution ◽  
Performance Results

scholarly journals Sexual Dimorphism in White Campion: Deletion on the Y Chromosome Results in a Floral Asexual Phenotype

Genetics ◽  
1999 ◽  
Vol 151 (3) ◽  
pp. 1187-1196 ◽  
Author(s):  
Isabelle Farbos ◽  
Jacky Veuskens ◽  
Boris Vyskot ◽  
Margarida Oliveira ◽  
Stefan Hinnisdaels ◽  
...  
Keyword(s):  
Sexual Dimorphism ◽  
Y Chromosome ◽  
Gamma Ray ◽  
Functional Organization ◽  
Male Dimorphism ◽  
Developmental Defects ◽  
White Campion ◽  
Wild Type Female ◽  
Default State ◽  
Gamma Ray Irradiation

AbstractWhite campion is a dioecious plant with heteromorphic X and Y sex chromosomes. In male plants, a filamentous structure replaces the pistil, while in female plants the stamens degenerate early in flower development. Asexual (asx) mutants, cumulating the two developmental defects that characterize the sexual dimorphism in this species, were produced by gamma ray irradiation of pollen and screening in the M1 generation. The mutants harbor a novel type of mutation affecting an early function in sporogenous/parietal cell differentiation within the anther. The function is called stamen-promoting function (SPF). The mutants are shown to result from interstitial deletions on the Y chromosome. We present evidence that such deletions tentatively cover the central domain on the (p)-arm of the Y chromosome (Y2 region). By comparing stamen development in wild-type female and asx mutant flowers we show that they share the same block in anther development, which results in the production of vestigial anthers. The data suggest that the SPF, a key function(s) controlling the sporogenous/parietal specialization in premeiotic anthers, is genuinely missing in females (XX constitution). We argue that this is the earliest function in the male program that is Y-linked and is likely responsible for “male dimorphism” (sexual dimorphism in the third floral whorl) in white campion. More generally, the reported results improve our knowledge of the structural and functional organization of the Y chromosome and favor the view that sex determination in this species results primarily from a trigger signal on the Y chromosome (Y1 region) that suppresses female development. The default state is therefore the ancestral hermaphroditic state.

Correlated Evolution of Allometry and Sexual Dimorphism across Higher Taxa

2013 ◽  
Vol 182 (5) ◽  
pp. 630-639 ◽  
Author(s):  
Stephen P. De Lisle ◽  
Locke Rowe
Keyword(s):  
Sexual Dimorphism ◽  
Correlated Evolution ◽  
Higher Taxa

RHYNCHOLITES AND THE PROBLEM OF NARROW AND BROAD CONCEPTION OF TAXONS

2018 ◽  
pp. 12-17 ◽  
Author(s):  
I. R. Khuzina ◽  
V. N. Komarov
Keyword(s):  
Sexual Dimorphism ◽  
Morphological Characteristics ◽  
Mass Scale ◽  
Individual Variability ◽  
Point Of View ◽  
The Other ◽  
New Taxon ◽  
Artificial System ◽  
Broad Understanding

The paper considers a point of view, based on the conception of the broad understanding of taxons. According to this point of view, rhyncholites of the subgenus Dentatobeccus and Microbeccus are accepted to be synonymous with the genus Rhynchoteuthis, and subgenus Romanovichella is considered to be synonymous with the genus Palaeoteuthis. The criteria, exercising influence on the different approaches to the classification of rhyncholites, have been analyzed (such as age and individual variability, sexual dimorphism, pathological and teratological features, degree of disintegration of material), underestimation of which can lead to inaccuracy. Divestment of the subgenuses Dentatobeccus, Microbeccus and Romanovichella, possessing very bright morphological characteristics, to have an independent status and denomination to their synonyms, has been noted to be unjustified. An artificial system (any suggested variant) with all its minuses is a single probable system for rhyncholites. The main criteria, minimizing its negative sides and proving the separation of the new taxon, is an available mass-scale material. The narrow understanding of the genus, used in sensible limits, has been underlined to simplify the problem of the passing the view about the genus to the other investigators and recognition of rhyncholites for the practical tasks.

Observation on the breeding biology of Polypedates teraiensis (Dubois, 1987) (Amphibia: Rhacophoridae)

2017 ◽  
Vol 17 (1) ◽  
pp. 25-32
Author(s):  
Jacinta Lalchhanhimi ◽  
Lalremsanga H.T.
Keyword(s):  
Sexual Dimorphism ◽  
Breeding Season ◽  
Sound Production ◽  
Reproductive Function ◽  
Breeding Biology ◽  
Tree Frog ◽  
University Campus ◽  
Morphometric Measurements ◽  
Advertisement Calls ◽  
Males And Females

The breeding biology of tree frog, Polypedates teraiensis was studied during the breeding season at Mizoram University Campus. It was found that sound production by male during the breeding season was primarily a reproductive function and advertisement calls attract females to the breeding areas and announce other males that a given territory is occupied. The aim of this study was to provide the detailed information on the breeding behaviour and the advertisement calls of Polypedates teraiensis. The morphometric measurements of the amplecting pairs (males and females) for sexual dimorphism along with clutch sizes were also studied.

Sexual dimorphism in the mechanisms for insulin resistance

2019 ◽  
Author(s):  
Marcia Hiriart ◽  
Myrian Velasco ◽  
Marcia Hiriart
Keyword(s):  
Insulin Resistance ◽  
Sexual Dimorphism
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