Background: Comparing sexual size dimorphism (SSD) in the light of the phylogenetic hypothesis may help to understand the phenotypic evolution associated with sexual selection (size of whole body and of reproduction-related body parts). Within a macroevolutionary framework, we evaluated the association between the evolution of SSD and the evolution of reproduction-related phenotypic traits, and whether this association has favored female fecundity, considering also variations according to reproductive modes. We focused on the lizard species that inhabit the Chaco Domain since this is a natural unit with a high diversity of species.
Results: The residual SSD was related positively with the residuals of the reproduction-related phenotypic traits that estimate intrasexual selection and with the residuals of inter-limb length and, according to fecundity selection, those residuals were related positively with the residuals of clutch size in oviparous species. Lizards of the Chaco Domain present a high diversity of SSD patterns, probably related to the evolution of reproductive strategies.
Conclusions: Our findings highlight that the sexual selection may have acted on the whole-body size as well as on the size of body parts related to reproduction. Male and female phenotypes evolutionarily respond to variations in SSD, and an understanding of these patterns is essential for elucidating the processes shaping sexual phenotype diversity from a macroevolutionary perspective.
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http://dx.doi.org/10.1186/s12862-018-1299-6 | DOI Listing |
Comp Biochem Physiol Part D Genomics Proteomics
December 2024
The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, China. Electronic address:
Apostichopus japonicus is a representative temperate sea cucumber species, that mainly inhabits in coastal zone of the continental shelf. With high nutritional value and important medical value, A. japonicus become an important commercial aquaculture species and produce significant economic value in recent years.
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October 2024
INRAE, CNRS, Université de Tours, PRC, Nouzilly, France.
Front Physiol
March 2024
College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China.
The genetic male sterile line () of the silkworm is a recessive mutant that is naturally mutated from the wild-type strain. One of the major characteristics of the mutant is its small larvae. Through positional cloning, candidate genes for the mutant were located in a region approximately 800.
View Article and Find Full Text PDFBiomolecules
January 2024
Department of Animal Sciences, Auburn University, Auburn, AL 36849, USA.
Despite collective efforts to understand the complex regulation of reproductive traits, no causative genes and/or mutations have been reported yet. By integrating genomics and transcriptomics data, potential regulatory mechanisms may be unveiled, providing opportunities to dissect the genetic factors governing fertility. Herein, we identified regulatory variants from RNA-Seq data associated with gene expression regulation in the uterine luminal epithelial cells of beef cows.
View Article and Find Full Text PDFGenes (Basel)
November 2023
College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450002, China.
Reproductive traits hold considerable economic importance in pig breeding and production. However, candidate genes underpinning the reproductive traits are still poorly identified. In the present study, we executed a genome-wide association study (GWAS) and runs of homozygosity (ROH) analysis using the PorcineSNP50 BeadChip array for 585 Yorkshire pigs.
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