Table 4.

Statistics of seven libraries and their reads mapping*

Library	CK	D1	D2	D3	C1	C2	C3
Raw reads (M)	8.91	8.34	8.66	8.92	8.59	8.38	8.37
Clean reads (M)	8.86	8.29	8.62	8.87	8.52	8.32	8.32
Mapped reads (M)	7.53	7.31	7.62	7.78	7.42	7.18	7.23
% of mapped reads	85.0	88.2	88.4	87.7	87.1	86.3	86.9
Perfectly matched reads (M)	6.25	6.12	6.37	6.53	6.22	5.90	5.98
% of perfectly matched reads	71.6	73.8	73.9	74.2	72.9	70.6	71.9
Mismatched reads (M)	1.28	1.19	1.25	1.25	1.20	1.29	1.24
% of mismatched reads	14.7	14.4	14.5	14.2	14.1	15.5	15.0
Uniquely matched reads (M)	5.60	5.27	5.54	5.75	5.46	5.27	5.31
% of uniquely matched reads	63.2	63.6	64.3	64.8	64.1	63.3	63.8
Unmapped reads (M)	1.2	0.98	1.00	1.02	1.10	1.14	1.09
% of unmapped reads	13.5	11.8	11.6	11.5	12.9	13.7	13.1
Total unigenes	60279	61029	60149	59789	61231	62693	61568
Coverage (%)	70.0	70.9	69.9	69.5	71.2	72.9	71.5

*CK: untreated control; D1, D2 and D3: 2, 8 and 24 h after drought treatment; C1, C2 and C3: 2, 8 and 24 h after cold treatment; M: million; Mismatch: ≤ 2 bp; Coverage (%): total unigenes in each library/86058 assembled unigenes.