Table 1.

Phylogenetic signal estimated with Blomberg's K. Mean ± s.e. of K and average p-values are calculated across 200 trees to account for phylogenetic uncertainty.

	genomea		chromosome		symbiosis island
trait	K	p-value	K	p-value	K	p-value
HGRb	0.04353235	0.126	0.03059187	0.012	0.06993263	0.017
atm%15N	0.07843186	0.07	0.03094816	0.007	0.2053341	0.016
nodule massc	0.2301758	0.203	0.02789672	0.004	0.0730706	0.005

^aGenome refers to trees reconstructed with all four loci.

^bHGR refers to host growth response.

^cMean individual nodule mass.