The isolated RNA was reverse transcribed into cDNA by an M-MuLV cDNA Synthesis Kit (Sangon Biotech). The primers of this study for qRT-PCR were designed by Primer Premier 5.0 software to verify the relative expression level of randomly selected genes with the 18S gene as an internal control. The relative expression of these randomly selected genes was calculated with the 2−△△Ct method. The PCR conditions were set as follows: predenaturation at 95°C for 10 min and 40 cycles of 95°C for 10 s and 60°C for 30 s (Wu et al., 2021 (link)).
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