scholarly journals Analysis of correlation structure in Lymantria dispar L. larvae from locally adapted populations

2013 ◽  
Vol 65 (2) ◽  
pp. 525-531
Author(s):  
Marija Mrdakovic ◽  
Vesna Peric-Mataruga ◽  
Larisa Ilijin ◽  
Milena Vlahovic ◽  
D. Mircic ◽  
...  
Keyword(s):  
Life History ◽  
Host Plant ◽  
Lymantria Dispar ◽  
Enzyme Activities ◽  
Life History Traits ◽  
Digestive Enzyme ◽  
Genetic Correlations ◽  
Allelochemical Stress ◽  
Sib Families ◽  
Digestive Enzyme Activities

The influence of allelochemical stress and population origin on the patterns of phenotypic and genetic correlations among life history traits and digestive enzyme activities were investigated in larvae of the gypsy moth (Lymantria dispar L.; Lepidoptera: Lymantriidae). Thirty-two full-sib families from oak (suitable host plant, Quercus population), and twenty-six full-sib families from locust-tree (unsuitable host plant, Robinia population) forests were reared on an artificial diet, with or without a 5% tannic acid supplement. Comparison of correlation matrices revealed significant similarity between the two populations in the structure of phenotypic and genetic correlations of life history traits and of digestive enzyme activities. The patterns of correlations of the examined traits, within each of the two locally adapted populations and in the presence of allelochemical stress, remained stabile despite the different selection pressures that mold these traits.

scholarly journals Mapping the adaptive landscape of a major agricultural pathogen reveals evolutionary constraints across heterogeneous environments

2021 ◽  
Author(s):  
Anik Dutta ◽  
Fanny E. Hartmann ◽  
Carolina Sardinha Francisco ◽  
Bruce A. McDonald ◽  
Daniel Croll
Keyword(s):  
Life History ◽  
Large Scale ◽  
Life History Traits ◽  
Genetic Correlations ◽  
Stress Factors ◽  
Life History Trait ◽  
Adaptive Landscape ◽  
Heterogeneous Environments ◽  
Growth Responses ◽  
Trade Offs

AbstractThe adaptive potential of pathogens in novel or heterogeneous environments underpins the risk of disease epidemics. Antagonistic pleiotropy or differential resource allocation among life-history traits can constrain pathogen adaptation. However, we lack understanding of how the genetic architecture of individual traits can generate trade-offs. Here, we report a large-scale study based on 145 global strains of the fungal wheat pathogen Zymoseptoria tritici from four continents. We measured 50 life-history traits, including virulence and reproduction on 12 different wheat hosts and growth responses to several abiotic stressors. To elucidate the genetic basis of adaptation, we used genome-wide association mapping coupled with genetic correlation analyses. We show that most traits are governed by polygenic architectures and are highly heritable suggesting that adaptation proceeds mainly through allele frequency shifts at many loci. We identified negative genetic correlations among traits related to host colonization and survival in stressful environments. Such genetic constraints indicate that pleiotropic effects could limit the pathogen’s ability to cause host damage. In contrast, adaptation to abiotic stress factors was likely facilitated by synergistic pleiotropy. Our study illustrates how comprehensive mapping of life-history trait architectures across diverse environments allows to predict evolutionary trajectories of pathogens confronted with environmental perturbations.

Changes in digestive enzyme activities during the early ontogeny of the South American cichlid (Cichlasoma dimerus)

2021 ◽  
Author(s):  
Francisco Javier Toledo-Solís ◽  
Andrea Guadalupe Hilerio-Ruiz ◽  
Tomás Delgadin ◽  
Daniela Pérez Sirkin ◽  
María Paula Di Yorio ◽  
...  
Keyword(s):  
Enzyme Activities ◽  
Digestive Enzyme ◽  
Early Ontogeny ◽  
South American ◽  
The South ◽  
Digestive Enzyme Activities

Feeding turmeric in combination with ginger or garlic enhances the digestive enzyme activities, growth and immunity in Labeo rohita fingerlings

2021 ◽  
pp. 114964
Author(s):  
Dilip Kumar Chowdhury ◽  
Narrotam Prasad Sahu ◽  
Parimal Sardar ◽  
Ashutosh Dharmendra Deo ◽  
Megha Kadam Bedekar ◽  
...  
Keyword(s):  
Enzyme Activities ◽  
Labeo Rohita ◽  
Digestive Enzyme ◽  
Digestive Enzyme Activities
Sign in / Sign up

Export Citation Format

Share Document