Molecular adaptation in flowering and symbiotic recognition pathways: insights from patterns of polymorphism in the legume Medicago truncatula

Table 1 Summary of nucleotide polymorphism in control gene fragments

Average Statistic	Whole sample	Group 1	Group 2
Number of sequences used	50	22	28
Number of sites analysed	1208.27	1184.97	1217.70
Number of polymorphic sites	32.46	19.27	25.03
Watterson's θ^&	0.004421	0.003231	0.003662
Nucleotide diversity (π)^&	0.003409	0.002766	0.003185
Tajima's D	-0.81	-0.73	-0.58
Fu and Wu's Z^#	0.04	0.03	-0.05
F_ST between group 1 and 2	0.156	N/A	N/A
Hudson's ρ	0.063	0.020	0.164

All values are given as averages over the 37 control loci.
Group 1 and Group 2 are the two groups inferred using Instruct on sequence data obtained on control loci: Group 2 is the Spain-Morocco group and Group1 the eastern part of the sample (Figure 1)
&: per site estimates are reported here,
#: Z standardization of Fay and Wu's H.
N/A: not applicable.
The value Hudson's ρ reported here is the average of ρ estimates per analysed site.

ISSN: 2730-7182