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PCR products on 2% agarose gel stained with ethidium bromide. Amplification products of seven candidate reference genes selected for gene validation of R. apiculata samples. M: 100 bp DNA ladder. Lanes 1, 2, 3, 4, 5, 6 and 7 were the gene products of 18S, ACT, EF1α, UBQ, RbcL, β-TUB, and GAPDH, respectively.
