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. Author manuscript; available in PMC: 2016 Dec 1.
Published in final edited form as: Comp Biochem Physiol C Toxicol Pharmacol. 2015 Aug 6;178:86–92. doi: 10.1016/j.cbpc.2015.07.011

Figure 3. Differentially expressed genes between hybrid and parental fish strains.

Figure 3

(a) The Sp-Couch hybrid has different gene expression compared to either X. couchianus or X. maculatus parent. Statistical analysis showed 1079 differentially expressed genes between Sp-Couch hybrid and X. couchianus and 706 differentially expressed genes between Sp-Couch hybrid and X. maculatus. (b) Functional enrichment of differentially expressed genes between Sp-Couch hybrid and each of the parental fish species is analyzed using Gene Ontology (GO). Of the 257 enriched functions between the Sp-Couch hybrid and X. couchianus, and 118 enriched functions between the Sp-Couch hybrid and X. maculatus, 56 functions overlapped. A significant part of the overlapping functions are related to melanin synthesis and pigmentation. (c) 18 genes are identified as hybridization-initiated and UVB-responsive genes. This group of genes does not show a response to UVB in any parental strain. The hybridization event served to up-regulate the expression of these genes while UVB exposure further stimulated the their expression levels.