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. Author manuscript; available in PMC: 2011 Apr 1.
Published in final edited form as: Insect Mol Biol. 2009 Dec 11;19(2):153–162. doi: 10.1111/j.1365-2583.2009.00965.x

Figure 4. Principal components analysis.

Figure 4

PCA based on the 631 significant transcripts identified 3 principal components. PC1 demonstrates that 44.7% of the variation in gene expression is associated with the effects of instrumental insemination. Principal component 2 encapsulates 34.7% of the variation in gene expression, and appears to be associated with the effects of semen on brain gene expression. Principal component 3, and it probably represents the interaction between the instrumental insemination procedure and the effects of semen-exposure, with inseminated groups showing opposite patterns of variation associated with semen-exposure compared to the mated and virgin groups.