Can amphibians take the heat? Vulnerability to climate warming in subtropical and temperate larval amphibian communities
Predicting the biodiversity impacts of global warming implies that we know where and with what magnitude these impacts will be encountered. Amphibians are currently the most threatened vertebrates,…
Subterranean rodents of the genus Ctenomys (Caviomorpha, Ctenomyidae) follow the converse to Bergmann's rule
The existence of inter‐ and intraspecific size clines was tested to determine if these rodents follow Bergmann's rule, to compare intra‐ and interspecific size trends and to assess the relevance of the subterranean lifestyle on these trends.
Tracking the evolution of sex chromosome systems in Melanoplinae grasshoppers through chromosomal mapping of repetitive DNA sequences
- O. M. Palacios-Gimenez, Elio R D Castillo, D. A. Martí, D. C. Cabral-de-Mello
- BiologyBMC Evolutionary Biology
- 9 August 2013
This work used classical cytogenetic and FISH analyses to examine the repetitive DNA sequences in six phylogenetically related Melanoplinae species to suggest a common origin and subsequent differential accumulation of repetitive DNAs in the sex chromosomes of Dichromatos and an independent origin of the sex chromosome of the neo-XY and neo-X1X2Y systems.
Bergmann's rule across the equator: a case study in Cerdocyon thous (Canidae).
- P. Martinez, D. A. Martí, W. F. Molina, C. Bidau
- Environmental ScienceJournal of Animal Ecology
- 1 September 2013
It is possible that the observed pattern - southern populations following Bergmann's rule while northern populations reflecting the opposite - has been influenced by the events that occurred during the LGM that could have led to the differentiation of populations.
Cytogenetic analysis on geographically distant parthenogenetic populations of Tityus trivittatus Kraepelin, 1898 (Scorpiones, Buthidae): karyotype, constitutive heterochromatin and rDNA localization
- Renzo S. Adilardi, A. Affilastro, D. A. Martí, L. M. Mola
- BiologyComparative Cytogenetics
- 12 March 2014
It is proposed that a possible explanation for the lack of karyotypic variation between these geographically distant populations could be a recent colonization of urban areas by human means of synanthropic specimens from a single lineage of northeastern Argentina.
Geographic distribution of Robertsonian fusions in Dichroplus pratensis (Melanoplinae, Acrididae): the central-marginal hypothesis reanalysed
A series of central and marginal populations which display typical features of each type and also, identify for the first time completely standard telocentric marginal populations at the southernmost and northernmost limits of the species distribution and show, as expected, the highest recombination indices.
How dynamic could be the 45S rDNA cistron? An intriguing variability in a grasshopper species revealed by integration of chromosomal and genomic data
Findings broaden the knowledge of rDNA dynamics, revealing an independent movement and amplification of segments of 45S rDNA cistron, which in A. flavolineata could be attributed to ectopic recombination.
Variability along a latitudinal gradient in the chiasma frequency and morphological characters of Dichroplus pratensis (Orthoptera: Acrididae)
The decrease in fusion polymorphism and the consequent increase in genetic recombination in the marginal areas, is a result of natural selection favouring higher levels of variability, which could be adaptive in ecologically harsher and changing environments.
Sex and Neo-Sex Chromosomes in Orthoptera: A Review*
The hypothesis that neo-sex chromosome systems produce favorable new linkage relationships between genes in the X and the involved autosome, some of which could be sex determination related, creating a new balance between sex chromosomes and autosomes is discussed.
FISH-mapping of the 5S rDNA locus in chili peppers (Capsicum-Solanaceae).
- P. Aguilera, H. Debat, M. Scaldaferro, D. A. Martí, M. Grabiele
- BiologyAnais da Academia Brasileira de Ciências
- 4 March 2016
This is the first cytological characterization of the 5S in wild taxa of Capsicum by using a genus-derived probe, and the most exhaustive and comprehensive in the chili peppers up to now.