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Ictalurus punctatus

ABSTRACT: Bulk segregant RNA-seq reveals expression and positional candidate genes and allele-specific expression for disease resistance against enteric septicemia of catfish

PROVIDER: PRJNA213035 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR942315_1.fastq.gz	Fastqsanger.gz
	SRR942315_2.fastq.gz	Fastqsanger.gz
	SRR942316.fastq.gz	Fastqsanger.gz
	SRR942316_1.fastq.gz	Fastqsanger.gz
	SRR942316_2.fastq.gz	Fastqsanger.gz

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Expression analysis of Edwardsiella ictaluri 93-146 wild type and mutant strains during catfish serum exposure.

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Expression analysis of Edwardsiella ictaluri 93-146 wild type and mutant strains during catfish fry encounter.

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Environmental dependent heterosis and transgressive gene expression in reciprocal hybrids between the channel catfish Ictalurus punctatus and the blue catfish Ictalurus furcatus

Project description:The hybrid between female channel catfish (Ictalurus punctatus) and male blue catfish (Ictalurus furcatus) is superior in feed conversion, disease resistance, carcass yield, and harvestability compared to both parental species. However, heterosis and heterobeltiosis only occur in pond culture, and channel catfish grow much faster than the other genetic types in small culture units. This environment-dependent heterosis is intriguing, but the underlying genetic mechanisms are not well understood. In this study, phenotypic characterization and transcriptomic analyses were performed in the channel catfish, blue catfish, and their reciprocal F1s reared in tanks. The results showed that the channel catfish is superior in growth-related morphometrics, presumably due to significantly lower innate immune function, as investigated by reduced lysozyme activity and alternative complement activity. RNA-seq analysis revealed that genes involved in fatty acid metabolism/transport are significantly upregulated in channel catfish compared to blue catfish and hybrids, which also contributes to the growth phenotype. Interestingly, hybrids have a 40-80% elevation in blood glucose than the parental species, which can be explained by a phenomenon called transgressive expression (overexpression/underexpression in F1s than the parental species). A total of 1,140 transgressive genes were identified in F1 hybrids, indicating that 8.5% of the transcriptome displayed transgressive expression. Transgressive genes upregulated in F1s are enriched for glycan degradation function, directly related to the increase in blood glucose level. This study is the first to explore molecular mechanisms of environment-dependent hetero-sis/heterobeltiosis in a vertebrate species and sheds light on the regulation and evolution of heterosis vs. hybrid incompatibility.

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Deep transcriptomic analysis reveals the dynamic developmental progression during early development of channel catfish (Ictalurus punctatus)

Project description:Seven early developmental stages in channel catfish, Ictalurus punctatus, were selected for transcriptome sequencing and analysis, Differential expression analysis and WGCNA approach was applied. The genes that play vital roles in embryogenesis and regulation of early development in channel catfish were detected. Our work reveals new insights for exploring the underlying mechanisms of channel catfish early development.

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Project description:Channel catfish Testis Transcriptome

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Project description:Channel catfish sex determination

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Expression analysis of Edwardsiella ictaluri 93-146 wild type and mutant strains during catfish fry encounter.

Project description:Edwardsiella ictaluri is the causitive agent of enteric septicemia of catfish, one of the most important diseases impacting US catfish industry. The overall objective of this study is to identify E. ictaluri genes required for host encounter. 4-plex NimbleGen array study using total RNA obtained from wild type and mutant Edwardsiella ictaluri encountered with or without catfish fry. Each treatment had four biological replica and each plex had two probe sets.

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Expression analysis of Edwardsiella ictaluri 93-146 wild type and mutant strains during catfish serum exposure.

Project description:Edwardsiella ictaluri is the causitive agent of enteric septicemia of catfish, one of the most important diseases impacting US catfish industry. The overall objective of this study is to identify E. ictaluri genes required for serum resistance. 4-plex array study using total RNA obtained from wild type and mutant Edwardsiella ictaluri exposed to heat-inactivated catfish serum and normal serum. Each treatment had four biological replica and each plex had two probe sets.

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Project description:The genetic map of the catfish

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Project description:An EST project for the channel catfish

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