Table 1.

Recombination is predicted throughout the SpTrf gene sequences.^a

	L	IntA	IntB	1	6	6ab	6b	26	27	27a	27b	H3.1c	H3.2	TcRVd	TcRJ
L		***	***	**	**	▫	▫	***	***	▫	▫	▫	▫	▫	▫
IntA	**		***	**	***	▫	▫	***	***	▫	▫	▫	▫	▫	▫
IntB	**	**		ns	***	▫	▫	***	***	▫	▫	▫	▫	▫	▫
1	**	**	*		***	▫	▫	***	***	▫	▫	▫	▫	▫	▫
6	*	**	**	**		▫	▫	***	***	▫	▫	▫	▫	▫	▫
6a	▫	▫	▫	▫	▫		*	▫	▫	▫	▫	▫	▫	▫	▫
6b	▫	▫	▫	▫	▫	*		▫	▫	▫	▫	▫	▫	▫	▫
26	**	**	**	**	***	▫	▫		***	▫	▫	▫	▫	▫	▫
27	**	**	**	**	***	▫	▫	*		▫	▫	▫	▫	▫	▫
27a	▫	▫	▫	▫	▫	▫	▫	▫	▫		*	▫	▫	▫	▫
27b	▫	▫	▫	▫	▫	▫	▫	▫	▫	**		▫	▫	▫	▫
H3.1	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫		ns	▫	▫
H3.2	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫	ns		▫	▫
TcRV	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫		***
TcRJ	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫	▫	**

^aRecombination within and among elements is based on results from the incongruence length difference test shown above the diagonal and the incongruence permutation test shown below. This table is modified from Ref. (25).

^bFor some individual elements, comparisons are carried out between the 5′ end (a) and the 3′ end (b). Element numbers are based on the repeat-based alignment (see Figure 2B).

^cEvaluation of the sea urchin histone H3 gene sequence employed two regions of the gene sequence, H3.1 and H3.2, which were of similar size to the average element size in the SpTransformer (SpTrf) sequences.

^dEvaluation of the TcR employed the variable region (TcRV) and the joining region (TcRJ) (*p < 0.05, **p < 0.01, ***p < 0.001; ns, not significant; L, leader; Int, intron; ▫, not done).