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Malus hupehensis (Pamp.) Rehd.is a woody plant species native to China that is often used as a rootstock for growing apples.In this research, two suppressors of the G2 allele of SKP 1 genes from Malus hupehensis, MhSGT1a and MhSGT1b, were introduced into tobacco K326 plants under the control of a 35ScaMV.