Table 1. Accumulated somatic mutations per sample in each terminal branch of all sequenced plant samples.

Species (reference genome size)	Samples	Diameter of the trunk (cm)	Estimated age (years)	DNA source	Sequenced samples	Accumulated mutations
						Average observed	Normalized rate (× 10−9 per bp per year)a
P. mira (225 Mb)	G1b	207	600	Leaf	32	12.7	0.08
	G2	191	550	Leaf	12	23.9	0.15
	GL2	148	420	Leaf	23	17.7	0.14
	GZ	110	300	Leaf	9	12.8	0.15
P. persica (225 Mb)	PXLc	11.1	21	Leaf	23	3.74	0.52
				Rootd	13	29.8	4.06
	HY2	14	25	Leaf	16	6.19	0.62
				Petal	13	11.31	1.13
	NJAU1	15.9	30	Leaf	26	6.46	0.56
	NJAU2	37.6	50	Leaf	8	6.25	0.40
	Maoping	12.8	40	Leaf	16	3.56	0.26
	DHQ1	3.1	2	Leaf	75	1.97	2.54
P. mume (220 Mb)	MHG1	17.5	20	Leaf	25	12.9	2.17
				Rootd	32	25.4	4.82
	MHG2	10.2	8	Leaf	33	5.7	2.38
S. suchowensis (480 Mb)	YAF1	-	1	Leaf	19	1.26	2.58
				Rootd	21	2.86	6.60
B. distachyon (272 Mb)	WD2	-	1	Leaf	29	3.17	6.13
				Rootd	8	4.75	8.97
				Lemma	7	2.57	4.97
Fragaria vesca (210 Mb)	FH1	-	1	Leaf	45	1.93	6.37
				Stemse	4	4.75	15.78
Arabidopsis thaliana (119 Mb)	Col17+Col24	-	1	Leaf	64	0.69	4.35
Oryza sativa (373 Mb)	KA1+PA1+ DG1+NIPB	-	1	Leaf (Tiller)f	29	4.79	9.01
				Leaf (Callus)	13	194.8	287.1

^aMutation rate per bp per year corrected for accessible genome regions.

^bThe age of G1 was estimated to be at least 600 years old by comparing with another about 900-year-old peach tree whose diameter is about 240 cm, and this tree is only a few kilometers away from G1.

^cThe age of the PXL peach tree was estimated to be about 21 years old through counting its annual ring in 2016.

^dThese four samples contain both leaves from different trunk branches and roots from different underground root branches; in samples of tree roots, DNA was extracted from the phloem of the root.

^eIn these strawberry samples, four runner regions in the same vine were chosen for sequencing (see Fig 3B for details).

^fTiller samples from culture-derived plants were not included.