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Principal component analysis (PCA) of bacterial communities from mulberry monoculture (MM), intercropping mulberry (IM), soybean monoculture (SM), and intercropping soybean (IS) based on pyrosequencing of the 16S rDNA gene. PCA were generated using the presence of each OUT (at a distance level of 3%) found in each clone library. Principal components (PCs) 1 and 2 explained 49.60% and 26.76% of the variance respectively.
