2015 Fiscal Year Final Research Report
Evolutionary ecology of developmental system: Why has situs inversus evolved only in internally fertilizing snails?
| Project/Area Number |
26650161
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Ecology/Environment
|
|---|
| Research Institution | Shinshu University |
|---|
Principal Investigator |
ASAMI Takahiro 信州大学, 学術研究院理学系, 教授 (10222598)
|
|---|
| Project Period (FY) |
2014-04-01 – 2016-03-31
|
| Keywords | 左右性 |
|---|
| Outline of Final Research Achievements |
In bilaterian metazoa, mutation for left-right reversal is associated with an increased probability of early developmental defect and reduces survival. This purifying selection constrains the evolution of situs inversus. In contrast, left-right reversal of primary asymmetry has repeatedly evolved in gastropods that copulate for reproduction (i.e. internally fertilize). The present study disclosed that mutations in wild populations of terrestrial gastropods generate continuous variation in the degree of left-right polarity in spiral cleavage by their maternal effect.
|
| Free Research Field |
進化生物学
|
