TY  - GEN
ID  - cogprints1918
UR  - http://cogprints.org/1918/
A1  - Singh, Shree Ram
TI  - Female remating in Drosophila ananassae: bidirectional selection for remating speed
Y1  - 2001/07//
N2  - In Drosophila ananassae, artificial selection was carried out for fast and slow remating speed
for 10 generations. Response to selection resulted in rapid divergence in remating time in each
of two replicates of both fast and slow lines. There were significant differences in mean remat-ing
time in females among fast, slow, and control lines. Regression coefficients for both fast
and slow lines are significantly different from zero. The realized heritability over 10 genera-tions
of selection is from 0.26 to 0.33 for two replicates of fast line and from 0.23 to 0.27 for
two replicates of slow line. These findings suggest that female remating time in D. ananassae
is under polygenic control. Remating frequency of females showed a correlated response in both
fast and slow lines. At generation 10, correlated response to selection was also investigated.
Mating propensity of D. ananassae of fast and slow lines was observed in an Elens-Wattiaux
mating chamber. Fifteen pairs per test showed that on the average, the fast lines (11.20, 11.60)
were more successful in mating than those of slow (6.40, 5.60) and control (8.00) lines. Pro-ductivity
of once-mated females was measured in terms of number of progeny produced per fe-male
and the results of productivity analysis indicate that females of fast lines (157.83, 130.83)
produced more progeny compared with slow (72.70, 85.83) and control (109.23) lines.
AV  - public
KW  - female remating
KW  -  remating speed
KW  -  polyandry
KW  -  Drosophila ananassae
KW  -  polygenes
KW  -  selection
ER  -

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