Total RNA from flag leaves and roots of plants 1 week after flowering was extracted using Trizol reagent (Takara), and cDNAs were synthesized using a PrimeScript First-Strand cDNA Synthesis kit (Takara) according to the manufacturer’s protocol. qPCR was performed using SYBR master mix (Tiangen) with an ABI Prism 7500 real-time PCR system (Lifetech) as previously described (Yu et al., 2017 (link)). The relative transcript levels of genes were calculated using the 2−ΔΔCT method (Li et al., 2011 (link)). All primers used for qPCR are given in Supplementary Table S15.
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