BMC Ecology and Evolution

Table 2 Tree statistics for the four analyses.

From: Polytene chromosomes as indicators of phylogeny in several species groups of Drosophila

picture wing group				repleta group
	Total	Molecular	Inversions		Total	Molecular	Inversions
CI	0.62	0.59	0.95	CI	0.31	0.30	0.89
RI	0.85	0.81	0.99	RI	0.52	0.51	0.93
PI	177	141	36	PI	501	461	40
ST	542	443	95	ST	2774	2647	80
# T	36	60	2	# T	1	57	4
nch	942	849	93	nch	1737	1618	119
ntx	35	35	35	ntx	54	54	54
*melanogaster* group				*virilis* group
	Total	Molecular	Inversions		Total	Molecular	Inversions
CI	0.80	0.77	1.00	CI	0.83	0.84	0.84
RI	0.81	0.77	1.00	RI	0.90	0.90	0.94
PI	258	221	37	PI	112	91	21
ST	790	729	61	ST	260	209	49
# T	1	1	1	# T	6	24	33
nch	4991	4930	61	nch	2071	2024	47
ntx	8	8	8	ntx	11	11	11

Abbreviations: Total = combined data set, Molecular = only DNA sequence data, Inversions = only inversion data, CI = consistency index, RI = retention index, PI = number of parsimony informative characters in the data partition, ST = length of shortest tree, #T = number of most parsimonious trees obtained in the analysis, nch = number of characters in the data set, ntx = number of taxa.

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