Dataset Information

Domestication may affect the maternal mRNA profile in unfertilized eggs, potentially impacting the embryonic development of Eurasian perch (Perca fluviatilis).

ABSTRACT: Domestication is an evolutionary process during which we expect populations to progressively adapt to an environment controlled by humans. It is accompanied by genetic and presumably epigenetic changes potentially leading to modifications in the transcriptomic profile in various tissues. Reproduction is a key function often affected by this process in numerous species, regardless of the mechanism. The maternal mRNA in fish eggs is crucial for the proper embryogenesis. Our working hypothesis is that modifications of maternal mRNAs may reflect potential genetic and/or epigenetic modifications occurring during domestication and could have consequences during embryogenesis. Consequently, we investigated the trancriptomic profile of unfertilized eggs from two populations of Eurasian perch. These two populations differed by their domestication histories (F1 vs. F7+-at least seven generations of reproduction in captivity) and were genetically differentiated (FST = 0.1055, p<0.05). A broad follow up of the oogenesis progression failed to show significant differences during oogenesis between populations. However, the F1 population spawned earlier with embryos presenting an overall higher survivorship than those from the F7+ population. The transcriptomic profile of unfertilized eggs showed 358 differentially expressed genes between populations. In conclusion, our data suggests that the domestication process may influence the regulation of the maternal transcripts in fish eggs, which could in turn explain differences of developmental success.

SUBMITTER: Rocha de Almeida T

PROVIDER: S-EPMC6938363 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Domestication may affect the maternal mRNA profile in unfertilized eggs, potentially impacting the embryonic development of Eurasian perch (Perca fluviatilis).

Rocha de Almeida Tainá T Alix Maud M Le Cam Aurélie A Klopp Christophe C Montfort Jérôme J Toomey Lola L Ledoré Yannick Y Bobe Julien J Chardard Dominique D Schaerlinger Bérénice B Fontaine Pascal P

PloS one 20191231 12

Domestication is an evolutionary process during which we expect populations to progressively adapt to an environment controlled by humans. It is accompanied by genetic and presumably epigenetic changes potentially leading to modifications in the transcriptomic profile in various tissues. Reproduction is a key function often affected by this process in numerous species, regardless of the mechanism. The maternal mRNA in fish eggs is crucial for the proper embryogenesis. Our working hypothesis is t ...[more]

PMID: 31891603

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Project description:The domestication is an evolutionary process during which individuals will progressively adapt to an environment controlled by humans. It is accompanied by epigenetic and genetic modifications potentially leading to modifications in the transcriptomic profile in various tissues. The reproduction process is among the biological functions highly affected whatever the species and/or the way of domestication. Indeed, the reproduction success often decreases in domesticated populations. For fish, the molecular content of the eggs is crucial for the proper embryogenesis. Among these molecules the mRNA content depends directly from the gene expression and thus may reflect the genetic modifications occurring during this process. Here, we investigated the transcriptomic profile of eggs coming from females of two populations (F1 and Fx) that were reared in the same conditions and were genetically close. Our main goal was thus to determine how the domestication process may affect the reproduction success in the Eurasian perch and if it was mediated by the regulation of the transcription in the eggs. A regular follow up of the oogenesis progression showed few differences of the hormonal production between the two populations. Nevertheless, the histological study showed that the F1 females were more developed by the end of the oogenesis induction than the domesticated ones and as a result, they spawned earlier than the domesticated ones. The study of the early developmental success revealed significant differences between the populations. The microarray analysis of unfertilized eggs presented more than 350 transcripts differently expressed between the two populations. Among them, some specific genes were drastically more expressed in the domesticated (mex3B, hace1 and an uncharacterized protein) or F1 (per) populations. Our data show that the F1 population is more sensitive to the environmental conditions to advance oogenesis and reach the spawning season earlier. The transcriptomic profiles in eggs coming from the two populations were different and may lead to developmental impairments having a potential link with the domestication process. Further analyses are needed to explain these differences.

Dataset Information

Domestication may affect the maternal mRNA profile in unfertilized eggs, potentially impacting the embryonic development of Eurasian perch (Perca fluviatilis).

Publications

Domestication may affect the maternal mRNA profile in unfertilized eggs, potentially impacting the embryonic development of Eurasian perch (Perca fluviatilis).

Similar Datasets

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