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Table 2 Ages of selected nodes estimated by BEAST

From: Clock model makes a large difference to age estimates of long-stemmed clades with no internal calibration: a test using Australian grasstrees

Dataset Clock model Tree model Partitioned Node age estimates (with 95% BCI)
     Xanthorr-hoeaceae crown Xanthorr-hoea stem Xanthorrhoea crown Hemerocall-idoideae crown Asphodel-oideae crown
Monocots, cpDNA  
  UCLN Birth-death no 72 (62–83) 68 (58–78) 4.8 (1.9-9.8) 62 (54–72) 35 (21–53)
  UCLN Birth-death yes 68 (60–78) 64 (56–72) 4.8 (2.0-9.0) 58 (51–65) 31 (20–44)
  UCLN Yule no 74 (63–85) 70 (60–81) 5.0 (2.0-10.3) 63 (56–75) 37 (21–55)
  UCLN Yule yes 70 (61–79) 65 (58–74) 4.8 (2.2-9.3) 59 (52–67) 32 (20–47)
Xanthorrhoeaceae, cpDNA  
  UCLN Birth-death no 71 (69–73) 58 (43–70) 5.7 (2.4-11.7) 60 (58–72) 34 (22–47)
  UCLN Birth-death yes 71 (70–73) 60 (49–70) 5.0 (2.4-8.7) 66 (59–72) 35 (26–45)
  UCLN Yule no 71 (70–73) 58 (44–70) 6.4 (2.6-13.0) 66 (59–72) 35 (23–48)
  UCLN Yule yes 71 (70–73) 60 (50–71) 5.4 (2.6-9.4) 66 (59–72) 36 (27–46)
  RLC Birth-death no 72 (70–73) 59 (46–69) 30 (12–59) 68 (59–73) 24 (16–32)
  RLC Birth-death yes 72 (70–74) 63 (51–72) 24 (9–58) 61 (54–72) 27 (18–34)
  RLC Yule no 72 (70–74) 60 (46–70) 35 (13–59) 69 (60–73) 24 (17–33)
  RLC Yule yes 72 (70–73) 63 (52–72) 27 (12–68) 60 (54–71) 27 (19–34)
Xanthorrhoeaceae, rpb2  
  UCLN Birth-death no 71 (69–73) 41 (24–59) 3.4 (1.5-6.1) - -
  UCLN Birth-death yes 71 (69–73) 32 (21–45) 3.3 (1.8-5.7) - -
  UCLN Yule no 71 (69–73) 20 (3–46) 13 (2–31) - -
  UCLN Yule yes 71 (70–73) 26 (14–39) 5.7 (2.9-9.7) - -
  RLC Birth-death no 71 (69–73) 40 (31–54) 27 (17–37) - -
  RLC Birth-death yes 71 (69–73) 35 (28–43) 5.0 (2.8-7.8) - -
  RLC Yule no 71 (69–73) 40 (32–48) 26 (17–35) - -
  RLC Yule yes 71 (70–73) 38 (30–46) 24 (15–32) - -
  1. The Xanthorrhoea crown was the target node for dating, being the broom clade with no internal calibration. In the two Xanthorrhoeaceae datasets (cpDNA and rpb2), the root (= family crown node) was calibrated with a normal prior, mean = 71, SD = 1.0. Rows with bolded text have the best-fit model combination for each dataset as assessed by Bayes factors using marginal likelihoods estimated from BEAST using path and stepping-stone sampling. BCI = 95% Bayesian confidence internal. UCLN = uncorrelated lognormal clock. RLC = random local clocks.