| 1. | During summer, low water levels cut off gene flow between these two.
|
| 2. | Gene flow is either absent or greatly restricted among these isolated pockets.
|
| 3. | In this case, divergence is facilitated by the absence of gene flow.
|
| 4. | However, other authors claimed to have found evidence of such gene flow.
|
| 5. | Indeed, ongoing gene flow or incomplete lineage sorting is indicated between these populations.
|
| 6. | Physical barriers to gene flow are usually, but not always, natural.
|
| 7. | It is not known when gene flow between the subspecies ceased.
|
| 8. | This may result in gene flow between the two populations because of introgression.
|
| 9. | Potential effects include gene flow, pesticide resistance and greenhouse gas emissions.
|
| 10. | The Yenisei River in particular contributed to extensive east-west gene flow.
|