Unknown,Transcriptomics,Genomics,Proteomics

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A cDNA Microarray, UniShrimpChip, for Identification of Genes Relevant to Testicular Development in the Black Tiger Shrimp (Penaeus monodon)

ABSTRACT: Comparisons of gene expression profiles from testis of wild and domesticated male brooders were made through a cDNA microarray in the black tiger shrimp (Penaeus monodon). Differentially expressed genes were identified through the microarray analysis, and the microarray results were confirmed by real-time PCR. Selected genes were further characterized. A cDNA microarray was constructed from the EST libraries of P. monodon, consisting of 5,568 features. RNA samples were extracted from testes of pooled juveniles (4 month-old, pooled from n=114), broodstocks from West and East sides of Thailand, and domesticated broodstocks of 10-, 14-, and 18-month old. The RNA from testis of pooled juveniles was labeled with Cy3 dye as a reference and those of the broodstocks were labeled with Cy5 dye.

ORGANISM(S): Penaeus monodon

SUBMITTER: nitsara karoonuthaisiri

PROVIDER: E-GEOD-21890 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Captive rearing programs (hatcheries) are often used in conservation and management efforts for at-risk salmonid fish populations. However, hatcheries typically rear juveniles in environments that contrast starkly with natural conditions, which may lead to phenotypic and/or genetic changes that adversely affect the performance of juveniles upon their release to the wild. Environmental enrichment has been proposed as a mechanism to improve the efficacy of population restoration efforts from captive-rearing programs: in this study, we examine the influence of environmental enrichment during embryo and yolk-sac larval rearing at the level of the transcriptome in Atlantic salmon (Salmo salar). Full siblings were reared in either a M-bM-^@M-^\simpleM-bM-^@M-^] environment devoid of structure or a M-bM-^@M-^\complexM-bM-^@M-^] environment enriched with gravel substrate. At the end of endogenous feeding by juveniles, we examined patterns of gene transcription in head tissues using the cGRASP-designed Agilent 4M-CM-^W44K microarray. Significance analysis of microarrays (SAM) indicated that 808 genes were differentially transcribed between rearing environments and a total of 184 gene ontological (GO) terms were over- or under-represented, several of which are associated with mitosis/cell cycle and muscle and heart development. However, there were also pronounced differences among families in gene transcriptional response to rearing environment, with the number of genes significantly differentially transcribed by juveniles in our independent analyses of each family ranging from zero to 3445 (FDR of 5%). Overall, our results suggest that rearing environment enrichment can profoundly change patterns of gene transcription during salmon development, but that the degree of response depends on genetic background. This was a two-condition experiment in which a total of 30 RNA samples isolated from the heads of developing salmon were analysed: 15 juveniles reared in a traditional hatchery environment and 15 reared in a hatchery environment enriched with gravel substrate.

Dataset Information

A cDNA Microarray, UniShrimpChip, for Identification of Genes Relevant to Testicular Development in the Black Tiger Shrimp (Penaeus monodon)

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