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Gene expression analysis at the onset of sex differentiation in turbot (Scophthalmus maximus)

Overview of attention for article published in BMC Genomics, November 2015
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Title
Gene expression analysis at the onset of sex differentiation in turbot (Scophthalmus maximus)
Published in
BMC Genomics, November 2015
DOI 10.1186/s12864-015-2142-8
Pubmed ID
Authors

Diego Robledo, Laia Ribas, Rosa Cal, Laura Sánchez, Francesc Piferrer, Paulino Martínez, Ana Viñas

Abstract

Controlling sex ratios is essential for the aquaculture industry, especially in those species with sex dimorphism for relevant productive traits, hence the importance of knowing how the sexual phenotype is established in fish. Turbot, a very important fish for the aquaculture industry in Europe, shows one of the largest sexual growth dimorphisms amongst marine cultured species, being all-female stocks a desirable goal for the industry. Although important knowledge has been achieved on the genetic basis of sex determination (SD) in this species, the master SD gene remains unknown and precise information on gene expression at the critical stage of sex differentiation is lacking. In the present work, we examined the expression profiles of 29 relevant genes related to sex differentiation, from 60 up to 135 days post fertilization (dpf), when gonads are differentiating. We also considered the influence of three temperature regimes on sex differentiation. The first sex-related differences in molecular markers could be observed at 90 days post fertilization (dpf) and so we have called that time the onset of sex differentiation. Three genes were the first to show differential expression between males and females and also allowed us to sex turbot accurately at the onset of sex differentiation (90 dpf): cyp19a1a, amh and vasa. The expression of genes related to primordial germ cells (vasa, gsdf, tdrd1) started to increase between 75-90 dpf and vasa and tdrd1 later presented higher expression in females (90-105 dpf). Two genes placed on the SD region of turbot (sox2, fxr1) did not show any expression pattern suggestive of a sex determining function. We also detected changes in the expression levels of several genes (ctnnb1, cyp11a, dmrt2 or sox6) depending on culture temperature. Our results enabled us to identify the first sex-associated genetic cues (cyp19a1a, vasa and amh) at the initial stages of gonad development in turbot (90 dpf) and to accurately sex turbot at this age, establishing the correspondence between gene expression profiles and histological sex. Furthermore, we profiled several genes involved in sex differentiation and found specific temperature effects on their expression.

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Geographical breakdown

Country Count As %
Spain 1 2%
Germany 1 2%
Unknown 48 96%

Demographic breakdown

Readers by professional status Count As %
Researcher 10 20%
Student > Ph. D. Student 9 18%
Student > Master 6 12%
Student > Bachelor 5 10%
Student > Doctoral Student 3 6%
Other 9 18%
Unknown 8 16%
Readers by discipline Count As %
Agricultural and Biological Sciences 20 40%
Biochemistry, Genetics and Molecular Biology 9 18%
Environmental Science 3 6%
Unspecified 1 2%
Arts and Humanities 1 2%
Other 2 4%
Unknown 14 28%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 18 January 2016.
All research outputs
#14,701,200
of 22,833,393 outputs
Outputs from BMC Genomics
#6,104
of 10,655 outputs
Outputs of similar age
#211,497
of 386,425 outputs
Outputs of similar age from BMC Genomics
#254
of 388 outputs
Altmetric has tracked 22,833,393 research outputs across all sources so far. This one is in the 35th percentile – i.e., 35% of other outputs scored the same or lower than it.
So far Altmetric has tracked 10,655 research outputs from this source. They receive a mean Attention Score of 4.7. This one is in the 42nd percentile – i.e., 42% of its peers scored the same or lower than it.
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We're also able to compare this research output to 388 others from the same source and published within six weeks on either side of this one. This one is in the 34th percentile – i.e., 34% of its contemporaries scored the same or lower than it.