Research Article

Is Speciation Accompanied by Rapid Evolution? Insights from Comparing Reproductive and Nonreproductive Transcriptomes in Drosophila

Table 1

Number and (percent) of genes falling under accelerated, clock-like, and slow-rate categories in recently diverged species when compared to older species pairs. (a) Analysis using the published divergence boundaries according to Kliman et al. [33] for D. simulans and D. sechellia, and Tamura et al. [34] for D. melanogaster-D. simulans and D. yakuba-D. erecta. (b) Analysis using the revised divergence time estimates for D. simulans and D. sechellia. (c) Analysis applying the 95% confidence interval boundaries on revised divergence estimates.

Rate Categories
SlowClock-likeAccelerated

(a)
mel-sim versus yak-ere
𝑑 𝑁 1096 (22.63)2251 (46.48)1496 (30.89)
𝑑 𝑆 348 (7.19)3628 (74.91)867 (17.90)
sim-sec versus yak-ere
𝑑 𝑁 173 (3.99)314 (7.26)3840 (88.75)
𝑑 𝑆 37 (0.86)184 (4.25)4106 (94.89)

(b)
sim-sec versus yak-ere
𝑑 𝑁 594 (13.73)2275 (52.58)1458 (33.69)
𝑑 𝑆 311 (7.19)3241 (74.90)775 (17.91)

(c)
mel-sim versus yak-ere
𝑑 𝑁 963 (19.89)2996 (61.86)884 (18.25)
𝑑 𝑆 242 (5.00)4359 (90.00)242 (5.00)
sim-sec versus yak-ere
𝑑 𝑁 469 (10.84) 3007 (69.49) 851 (19.67)
𝑑 𝑆 216 (5.00)3895 (90.00)216 (5.00)

pse-per versus sim-sec
𝑑 𝑁 327 (8.20)2962 (74.27)699 (17.53)
𝑑 𝑆 199 (5)3590 (90)199 (5)