Table 6.

Estimates (Est) and statistical significance (P-value) of multi-linear regression (MLR) analysis for six candidate explanatory variables of variation in recombination rate and GC content, respectively

	Recombination				GC content
Parameter	Est	P-value	r2	PCR (%)	Est	P-value	r2	PCR (%)
Distance to end	−0.069	<10−15	−0.37	5.37	−0.048	<10−15	−0.42	12.21
Chromosome size	−0.036	<10−15	−0.21	1.89	−0.037	<10−15	−0.37	9.34
Microsatellites	0.002	0.67	0.23	5.75	0.107	<10−15	0.58	13.21
Repeat density	−0.001	0.81	0.01	2.60	−0.059	<10−15	−0.11	10.24
Motif density	0.061	<10−15	0.38	5.78	0.133	<10−15	0.65	15.40
Gene density	0.022	9.0·10−9	0.09	0.78	0.073	<10−15	0.29	5.52
Total				22.2				65.5

Included in the table is also the raw Pearson's pairwise correlation coefficient (r²) between each explanatory variable and recombination rate, and the amount of variation explained by each explanatory variable according to the principal component regression (PCR). Data are from chromosomes >20 Mb.