scholarly journals Endogenous regulation of 11-deoxycorticosterone (DOC) and corticosteroid receptors (CRs) during rainbow trout early development and the effects of corticosteroids on hatching

2018 ◽  
Vol 265 ◽  
pp. 22-30 ◽  
Author(s):  
Pia Kiilerich ◽  
Benjamin Geffroy ◽  
Claudiane Valotaire ◽  
Patrick Prunet
Keyword(s):  
Rainbow Trout ◽  
Early Development ◽  
Corticosteroid Receptors ◽  
Endogenous Regulation

TEMPERATURE AND MYOGENIC FACTOR TRANSCRIPT LEVELS DURING EARLY DEVELOPMENT DETERMINES MUSCLE GROWTH POTENTIAL IN RAINBOW TROUT(ONCORHYNCHUS MYKISS) AND SEA BASS (DICENTRARCHUS LABRAX)

2001 ◽  
Vol 204 (16) ◽  
pp. 2763-2771 ◽  
Author(s):  
D. WILKES ◽  
S. Q. XIE ◽  
N. C. STICKLAND ◽  
H. ALAMI-DURANTE ◽  
M. KENTOURI ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Muscle Fibre ◽  
Early Development ◽  
Sea Bass ◽  
Growth Potential ◽  
Mrna Levels ◽  
European Sea Bass ◽  
Transcript Levels ◽  
Fibre Number ◽  
Sea Bass Larvae

SUMMARY The influence of changes in environmental temperature on the mRNA levels of myogenic regulatory factors (MRFs), i.e. MyoD and myogenin, as well as myosin heavy chain (MyHC) were studied during early larval development in rainbow trout and sea bass. Phosphoimager analysis of northern blots indicated that there is an optimum temperature for the RNA transcript levels of MRF and MyHC RNA in trout and in sea bass larvae. In the trout strain studied, the highest concentration for MRF and MyHC transcripts was found at 8°C rather than 4°C or 20°C. In European sea bass, the highest concentrations of MRF and MyHC mRNA were observed at 15-20°C rather than 13°C. Raising sea bass larvae at 15°C was associated with higher MyHC gene expression as well as a trend towards an increase in total muscle fibre number and higher growth rates after transfer at ambient temperature. Results suggest that mRNA levels of MRF and MyHC can be used to optimise early development. An experiment in which the temperature was changed illustrates the consequence of precise temporal expression of MRF genes in specifying muscle fibre number at critical stages during early development.

Ultrastructural Study of the Early Development and Localization of Loma salmonae in the Gills of Experimentally Infected Rainbow Trout

2002 ◽  
Vol 88 (2) ◽  
pp. 244 ◽  
Author(s):  
L. E. Rodriguez-Tovar ◽  
G. M. Wright ◽  
D. W. Wadowska ◽  
D. J. Speare ◽  
R. J. F. Markham
Keyword(s):  
Rainbow Trout ◽  
Early Development ◽  
Ultrastructural Study ◽  
Loma Salmonae

scholarly journals An application of Bayesian QTL mapping to early development in double haploid lines of rainbow trout including environmental effects

2005 ◽  
Vol 86 (3) ◽  
pp. 209-221 ◽  
Author(s):  
VICTOR MARTINEZ ◽  
GARY THORGAARD ◽  
BARRIE ROBISON ◽  
MIKKO J. SILLANPÄÄ
Keyword(s):  
Rainbow Trout ◽  
Early Development ◽  
Life History Traits ◽  
Bayesian Method ◽  
Mapping Population ◽  
Linkage Groups ◽  
Dimensional Parameter ◽  
Posterior Expectation ◽  
Clonal Lines ◽  
Main Effects

A Bayesian model and variable dimensional parameter estimation based on Markov chain Monte Carlo was applied to map quantitative trait loci (QTLs) in a doubled haploid mapping population of rainbow trout. To increase power, the analysis was performed using the multiple-QTL model, which simultaneously accounted for all the environmental and genetic main effects that influence the expression of early development life history traits. By doing so we obtained the posterior estimated effects for the environmental factors as well as the number, positions, and the effects for the QTLs. The analyses revealed QTLs for time at hatching, embryonic length and weight at swim-up stage. The posterior expectation of the number of QTLs in different linkage groups shows that at least four QTLs are needed to explain the observed differences in early development between the clonal lines. The Bayesian method effectively combined all the information available to accurately position these QTLs in the rainbow trout genome.

Nuclear Proteins during Development: Incorporation of Leucine into Histones of Rainbow Trout during Early Development

1974 ◽  
Vol 52 (5) ◽  
pp. 393-398
Author(s):  
J. R. Trevithick
Keyword(s):  
Rainbow Trout ◽  
Early Development ◽  
Relative Proportion ◽  
Staining Technique ◽  
Cell Suspensions ◽  
Nuclear Proteins

Nuclear histones of embryos of rainbow trout (Salmo gairdnerii) were isolated after incubation of cell suspensions with [4,5-3H]leucine. The incorporation of leucine into nuclei at 10 °C was found to occur linearly for 4 h. At all stages examined from very early blastula to [Formula: see text] epiboly, a component identical in mobility to histone I was found when a sensitive staining technique was employed. The relative proportion of histone IIId is higher at early blastula, and decreased by mid-blastula to a level which remains constant relative to other components during the remainder of the stages examined. The major proportion of the leucine incorporated into histones is found at all stages in histones IIb1 and IIb2, but as development occurs, the relative proportion of incorporation into histone IV increases until at [Formula: see text] epiboly, it is almost equal to either histone IIb1 or IIb2.

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