Table 3.

Spearman Rank Correlation Coefficients Between Element Frequency, Fraction of Coding DNA and Recombination Rate^a

	Total genome		Chromosome arms
	Recombination rate	Fraction of coding DNA^b	Recombination rate	Fraction of coding DNA^b
Class I	-0.005 (0.067^*)	-0.375^* (-0.322^*)	0.127^** (0.0898^*)	-0.187^* (-0.202^*)
gypsy	-0.378^* (-0.257^*)	-0.426^* (-0.469^*)	0.060 (0.124^***)	-0.057 (-0.117^**)
Class II	-0.011 (-0.006)	-0.318^* (-0.232^*)	0.080^* (0.021)	-0.100^* (-0.155^*)
CACTA	-0.247^* (-0.193^*)	-0.271^* (-0.276^*)	0.023 (0.0011)	-0.074^* (-0.057)
Class III	0.035 (0.09^**)	-0.244^* (-0.218^*)	0.076^* (0.037)	-0.064 (-0.164^***)
Fraction of coding DNA	0.099^*	—	-0.139^**	—

Values given in parentheses are partial correlations, factoring out effects of coding fraction and recombination rate, respectively

Direct correlations between coding density and TE abundance are calculated by making bins that exclude TE contributions to DNA length. Partial correlations, factoring out recombination rate effects, use the original bins for accurate estimation of recombination rates over real physical distance. Two-tailed significance

, P <0.05

^**

, P <0.01

^***

, P <0.001