Table 1. Heights of diploid and autotetraploid apple plants (cultivar ‘Hanfu’) from 2008 to 2012.

Ploidy	Plant height (cm)
	2008	2009	2010	2011	2012
2x	61.80 ± 6.78*	123.40 ± 5.99*	187.88 ± 5.58*	199.20 ± 3.99*	208.20 ± 2.92*
4x	35.90 ± 3.60	71.40 ±  6.67	121.00 ± 6.08	135.53 ± 2.73	155.20 ± 6.69

Each value is the mean and standard deviation of five replicate plants. *Means in the same row followed by different letters were significantly different at р < 0.05. 2x: diploid; 4x: autotetraploid.