Table 2 Statistics of sRNA sequences from the five time periods

Total

12890133 (100%)

5192942 (100%)

13699236 (100%)

5541563 (100%)

9796428 (100%)

4132312 (100%)

9979347 (100%)

3248933 (100%)

12015602 (100%)

4708455 (100%)

miRNA

132708 (1.03%)

14424 (0.28%)

136908 (1.00%)

15984 (0.29%)

121949 (1.24%)

15178 (0.37%)

128290 (1.29%)

14628 (0.45%)

154361 (1.28%)

18132 (0.39%)

rRNA

3098878 (24.04%)

236603 (4.55%)

3083593 (22.51%)

243551 (4.39%)

2142415 (21.87%)

206114 (4.99%)

3255035 (32.62%)

237080 (7.30%)

2881673 (23.98%)

237067 (5.03%)

rRNAetc

117385 (0.91%)

17333 (0.33%)

113499 (0.83%)

17849 (0.32%)

89695 (0.92%)

14946 (0.36%)

118167 (1.18%)

16783 (0.52%)

112693 (0.94%)

16859 (0.36%)

snRNA

3019 (0.02%)

1592 (0.03%)

2959 (0.02%)

1573 (0.03%)

1675 (0.025)

1001 (0.02%)

2655 (0.03%)

1159 (0.04%)

2313 (0.02%)

1178 (0.03%)

snoRNA

893749 (6.94%)

542973 (10.46%)

966614 (7.06%)

574651 (10.37%)

621241 (6.34%)

388387 (9.40%)

482064 (4.83%)

287530 (8.85%)

742203 (6.18%)

444084 (9.43%)

known_miRNA

586650 (4.55%)

2514 (0.05%)

662848 (4.84%)

2677 (0.05%)

643511 (6.57%)

2894 (0.07%)

880816 (8.83%)

3336 (0.10%)

779202 (6.49%)

3117 (0.07%)

tRNA

358701 (2.78%)

32239 (0.62%)

343134 (2.50%)

33004 (0.60%)

211015 (2.15%)

24598 (0.60%)

334856 (3.35%)

29742 (0.91%)

262192 (2.18%)

27983 (0.59%)

Un-annotated

7699043 (59.73%)

4345264 (83.68%)

8389681 (61.24%)

4652274 (83.95%)

5964927 (60.89%)

3479194 (84.19%)

4777464 (47.87%)

2658675 (81.83%)

7080965 (58.93%)

3960035 (84.10%)

Mapping to genome

4967104 (38.53%)

594810 (11.45%)

4962707 (36.23%)

595219 (10.74%)

3500382 (35.73%)

439554 (10.64%)

4676439 (46.86%)

406764 (12.52%)

4595584 (38.25%)

499205 (10.6%)