Table 2. Summary of cpDNA and nrDNA genomic data for Castanospermum australe.
Population-level diversity for chloroplast and nuclear ribosomal DNA across all sample sites, and regional between-catchment genomic distances. Overall, diversity and divergence are higher in the comparative northern populations (AWT), than across the main study sites in northern NSW.
| Within-catchment diversity | Na | cpDNA SNPs b (SNP per bp) c | nrDNA SNPs b (SNP per bp) c | nrDNA average within-population variants d |
|---|---|---|---|---|
| AWT catchment sites | ||||
| Daintree | 1 (8) | 166 (1.3x10-3) | 2 (3.0x10-4) | 7 |
| Mulgrave-Russel | 1 (8) | 161 (1.3x10-3) | 0 (0) | 7 |
| Johnstone | 1 (8) | 182 (1.5x10-3) | 1 (1.7x10-4) | 8 |
| NNSW catchment sites | ||||
| Tweed | 1 (8) | 0 (0) | 0 (0) | 4 |
| Richmond | 4 (32) | 4 (3.2x10-5) | 0 (0) | 12 |
| Clarence | 4 (32) | 2 (1.6x10-5) | 0 (0) | 9.5 |
| Between-catchment genomic distances | Na |
cpDNA
e (N SNPs) f |
nrDNA
e (N SNPs) f |
|
| Average within AWT | 3 (24) | 4.1x10-3 (507) | 1.7x10-4 (1) | |
| Average within NNSW | 9 (72) | 1.0x10-4 (13) | 0 (0) | |
| Average AWT vs. NNSW | 12 (96) | 4.1x10-3 (511) | 3.4x10-4 (2) |
a Number of site/s and, in brackets, number of individuals sampled.
b Number of within-catchment SNPs that are fixed and not found in other catchments (i.e. unique to the catchment).
c SNP per base pair (based on total assembled cpDNA sequence 124,678 bp; and total assembled nrDNA sequence 5,813 bp).
d Average within-population number of heterozygous nrDNA sites for each catchment. No within-population variants were found in cpDNA.
e Average pairwise genomic distance between catchments.
f Average number of fixed between-catchment SNPs (i.e., differentiating catchments).