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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.