Table 1.
Statistical characteristics of bacterial isolate collections derived from main roots of sugar beet
| Bacterial isolate collections | |||||
|---|---|---|---|---|---|
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| Media | R2A | HM | Total | ||
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| Tissue types | SUa | COa | SU | CO | |
| Statistics | |||||
| No. of sequences | 187 | 161 | 92 | 91 | 531 |
| No. of OTUsb | 78 | 67 | 52 | 40 | 155 |
| No. of singletons | 43 | 44 | 33 | 24 | 90 |
| Library coverage (%)c | 77.0 | 72.7 | 64.1 | 73.6 | 83.1 |
| Diversity indexes | |||||
| Chao1 | 131.1 | 303.5 | 92.6 | 67.6 | |
| ACE | 194.1 | 273.2 | 159.1 | 124.8 | |
| Shannon index (H′) | 4.0 | 3.8 | 3.7 | 3.2 | |
| Simpson index (1/D) | 43.3 | 40.9 | 47.0 | 17.3 | |
a
SU and CO stand for the surface and core portions of main roots of sugar beet, respectively.
b
OTUs (Operational taxonomic units) were defined at 99% sequence identity by using MOTHUR.
c
C=1– (n1/N), where n1 is the number of singletons that appear once in a library, and N is the total number of strains in a isolate collection.