Phenotypic structure of plant facilitation networks

2020 ◽  
Author(s):  
Jose Antonio Navarro‐Cano ◽  
Marta Goberna ◽  
Alfonso Valiente‐Banuet ◽  
Miguel Verdú
Keyword(s):  
Phenotypic Structure ◽  
Plant Facilitation

scholarly journals Multivariate analysis as a tool for measuring the stability of morphometric traits in Lycopersicon plants from in vitro culture

2000 ◽  
Vol 23 (2) ◽  
pp. 479-493 ◽  
Author(s):  
Guillermo Pratta ◽  
Roxana Zorzoli ◽  
Liliana Amelia Picardi
Keyword(s):  
Multivariate Analysis ◽  
In Vitro Culture ◽  
Principal Component ◽  
Eigenvalues And Eigenvectors ◽  
Morphometric Traits ◽  
Regenerated Plants ◽  
Phenotypic Structure ◽  
Regeneration Cycle ◽  
The Stability

The phenotypic stability of morphometric traits in Lycopersicon spp. (stem perimeter at the base, middle and top, and number of flowers per cluster) was measured by multivariate analysis through a progeny test in order to estimate the genetic stability of these traits. Principal components were calculated for two groups of Lycopersicon spp., non-regenerated plants and the progeny of regenerated plants. Analysis of variance was performed to support principal component analysis. Both groups presented similar eigenvalues and eigenvectors, while no significant differences were found between any of the traits studied. These results indicated that the phenotypic structure was the same among the progeny of regenerated and non-regenerated plants, so that no variation would occur in in vitro culture. Multivariate analysis proved to be an appropriate methodology for the measurement of the stability of morphometric traits after one regeneration cycle.

scholarly journals Gene recruitments and dismissals in argonaut octopus genome provide insights to pelagic lifestyle adaptation and shell-like eggcase reacquisition

2021 ◽  
Author(s):  
Masa-aki Yoshida ◽  
Kazuki Hirota ◽  
Junichi Imoto ◽  
Miki Okuno ◽  
Hiroyuki Tanaka ◽  
...  
Keyword(s):  
Genome Sequence ◽  
Average Length ◽  
Draft Genome ◽  
Gene Clusters ◽  
Draft Genome Sequence ◽  
Shell Formation ◽  
Protein Coding ◽  
Homologous Genes ◽  
Phenotypic Structure ◽  
Comparative Genomics Analysis

The paper nautilus, Argonauta argo, also known as the greater argonaut, is a species of octopods distinctly characterized by its pelagic lifestyle and by the presence of a spiral-shaped shell-like eggcase in females. The eggcase functions by protecting the eggs laid inside it, and by building and keeping air intakes for buoyancy. To reveal the genomic background of the species′ adaptation to pelagic lifestyle and the acquisition of its shell-like eggcase, we sequenced the draft genome sequence of the species. The genome size was 1.1 Gb, which is the smallest among the cephalopods known to date, with the top 215 scaffolds (average length 5,064,479 bp) covering 81% (1.09 Gb) of the total assembly. A total of 26,433 protein-coding genes were predicted from 16,802 assembled scaffolds. From these, we identified nearly intact HOX, Parahox, Wnt clusters and some gene clusters probably related to the pelagic lifestyle, such as reflectin, tyrosinase, and opsin. For example, opsin might have undergone an extensive duplication in order to adapt to the pelagic lifestyle, as opposed to other octopuses, which are mostly the benthic. Our gene models also discovered several genes homologous to those related to calcified shell formation in Conchiferan Mollusks, such as Pif-like, SOD, and TRX. Interestingly, comparative genomics analysis revealed that the homologous genes for such genes were also found in the genome of the octopus, which does not have a shell, as well as the basal cephalopods Nautilus. Therefore, the draft genome sequence of A. argo we presented here had not only helped us to gain further insights into the genetic background of the dynamic recruitment and dismissal of genes for the formation of an important, converging extended phenotypic structure such as the shell and the shell-like eggcase, but also the evolution of lifestyles in Cephalopods and the octopods, from benthic to pelagic.

scholarly journals Understanding the Phenotypic Structure of Adult Retrospective ADHD Symptoms During Childhood in the United States

2012 ◽  
Vol 41 (3) ◽  
pp. 261-274 ◽  
Author(s):  
Krista W. Ranby ◽  
Marcella H. Boynton ◽  
Scott H. Kollins ◽  
F. Joseph McClernon ◽  
Chongming Yang ◽  
...  
Keyword(s):  
United States ◽  
The United States ◽  
Adhd Symptoms ◽  
Phenotypic Structure
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