Journal
SCIENTIFIC REPORTS
Volume 5, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/srep13847
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Funding
- National Natural Science Foundation of China [31430088]
- Major international cooperation projects of the National Natural Science Foundation of China [31210103918]
- Training Program of the Major Research Plan of the National Natural Science Foundation of China [91331105]
- Doctoral Fund of Ministry of Education of China [20114306130001]
- National High Technology Research and Development Program of China [2011AA100403]
- Cooperative Innovation Center of Engineering and New Products for Developmental Biology of the Education Department of Hunan Province [20134486]
- construct program of the key discipline in Hunan province and China
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Hybrid Megalobrama amblycephala x Culter alburnus represents a population newly formed by interspecific crossing between two different genera. Here we assessed the expression pattern of mRNA and small RNA in newly formed F-1, F-2 and their progenitors. Large amounts of nonadditively expressed protein-coding genes showed parental expression level dominance (ELD). Interestingly, the ELD pattern could inherit from F-1 to F-2, which guaranteed a stable appearance in progenies. The ELD-B genes were found to contribute to cell development, while the ELD-T genes were enriched in function of stress and adaptability. microRNAs (miRNA) also had similar expression patterns to genes. A high proportion of miRNAs showed nonadditive expression upon hybridization, and were found to target important genes with diverse roles potentially involved in stress adaption and development. Taken together, the gene and miRNA expression divergence contributes to heterosis in the newly formed hybrid, promising the successful existence of hybrid speciation.
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