Earth & Environmental Sciences
nodulation
89%
ecotype
48%
nitrogen fixation
44%
gene
41%
DNA
30%
host plant
24%
gene transfer
24%
bacterium
23%
microbial ecology
22%
nitrogen
21%
symbiosis
21%
genetic diversity
20%
geographical distribution
19%
fixation
17%
plant species
16%
marker
15%
phylogenetics
15%
need
9%
loss
9%
basin
9%
test
7%
analysis
4%
Agriculture & Biology
Medicago
70%
Ensifer meliloti
65%
nodulation
42%
ecotypes
29%
nitrogen fixation
27%
microbial ecology
17%
nitrogen-fixing bacteria
16%
Medicago truncatula
16%
Eastern European region
16%
functional diversity
15%
horizontal gene transfer
15%
essential genes
14%
nucleic acid hybridization
13%
symbiosis
12%
basins
12%
host plants
10%
geographical distribution
10%
taxonomy
9%
genes
9%
genetic variation
8%
nitrogen
7%
phylogeny
7%
bacteria
7%
DNA
6%
testing
5%
Medicine & Life Sciences
Melilotus
100%
Medicago
91%
Ecotype
47%
Nitrogen Fixation
42%
Medicago truncatula
24%
Nitrogen-Fixing Bacteria
23%
Symbiosis
18%
Horizontal Gene Transfer
18%
Ecology
16%
Essential Genes
15%
DNA
15%
Nitrogen
13%
Genetic Variation
13%
Genes
11%
Bacteria
9%
Population
5%