scholarly journals Faster development does not lead to correlated evolution of greater pre-adult competitive ability in Drosophila melanogaster

2005 ◽  
Vol 1 (1) ◽  
pp. 91-94 ◽  
Author(s):  
Mallikarjun Shakarad ◽  
N.G. Prasad ◽  
Kaustubh Gokhale ◽  
Vikram Gadagkar ◽  
M. Rajamani ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Competitive Ability ◽  
Correlated Evolution ◽  
Faster Development

scholarly journals Correction for Shakarad et al. , Faster development does not lead to correlated evolution of greater pre-adult competitive ability in Drosophila melanogaster

2005 ◽  
Vol 1 (4) ◽  
pp. 509-509
Author(s):  
Mallikarjun Shakarad ◽  
N. G. Prasad ◽  
Kaustubh Gokhale ◽  
Vikram Gadagkar ◽  
M. Rajamani ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Competitive Ability ◽  
Digital Object Identifier ◽  
Digital Object ◽  
Correlated Evolution ◽  
Related Article ◽  
Link Type ◽  
Article Type ◽  
Faster Development

Correction for ‘Faster development does not lead to correlated evolution of greater pre-adult competitive ability in Drosophila melanogaster ’ by Mallikarjun Shakarad, N. G. Prasad, Kaustubh Gokhale, Vikram Gadagkar, M. Rajamani and Amitabh Joshi (Biol. Lett. 1 , 91–94. (doi: 10.1098/2004.0261 )). On p. 91, the Digital Object Identifier should be 10.1098/rsbl.2004.0261.

scholarly journals Intergenerational paternal effect of adult density in Drosophila melanogaster

2018 ◽  
Author(s):  
Purbasha Dasgupta ◽  
Saubhik Sarkar ◽  
Akankshya A. Das ◽  
Tanya Verma ◽  
Bodhisatta Nandy
Keyword(s):  
Drosophila Melanogaster ◽  
Treatment Effect ◽  
Egg Size ◽  
Competitive Ability ◽  
Differential Mortality ◽  
Adult Density ◽  
Significant Treatment Effect ◽  
Male Fitness ◽  
Fitness Components ◽  
Significant Treatment

AbstractNotwithstanding recent evidences, paternal environment is thought to be a potential but unlikely source of fitness variation that can affect trait evolution. Here we studied intergenerational effects of males’ exposure to varying adult density in Drosophila melanogaster laboratory populations.We held sires at normal (N), medium (M) and high (H) adult densities for two days before allowing them to mate with virgin females. This treatment did not introduce selection through differential mortality. Further, we randomly paired males and females and allowed a single round of mating between the sires and the dams. We then collected eggs from the dams and measured the egg size. Finally, we investigated the effect of the paternal treatment on juvenile and adult (male) fitness components.We found a significant treatment effect on juvenile competitive ability where the progeny sired by the H-males had higher competitive ability. Since we did not find the treatment to affect egg size, this effect is unlikely to be mediated through variation in female provisioning.Male fitness components were also found to have a significant treatment effect: M-sons had lower dry weight at eclosion, higher mating latency and lower competitive mating success.While being the first study to show both adaptive and non-adaptive effect of the paternal density in Drosophila, our results highlight the importance of considering paternal environment as important source of fitness variation.

scholarly journals Evolution of reduced pre-adult viability and larval growth rate in laboratory populations of Drosophila melanogaster selected for shorter development time

2000 ◽  
Vol 76 (3) ◽  
pp. 249-259 ◽  
Author(s):  
N. G. PRASAD ◽  
MALLIKARJUN SHAKARAD ◽  
VISHAL M. GOHIL ◽  
V. SHEEBA ◽  
M. RAJAMANI ◽  
...  
Keyword(s):  
Growth Rate ◽  
Drosophila Melanogaster ◽  
Development Time ◽  
Larval Growth ◽  
Dry Weight ◽  
Relative Reduction ◽  
Larval Growth Rate ◽  
Laboratory Populations ◽  
The Difference ◽  
Faster Development

Four large (n > 1000) populations of Drosophila melanogaster, derived from control populations maintained on a 3 week discrete generation cycle, were subjected to selection for fast development and early reproduction. Egg to eclosion survivorship and development time and dry weight at eclosion were monitored every 10 generations. Over 70 generations of selection, development time in the selected populations decreased by approximately 36 h relative to controls, a 20% decline. The difference in male and female development time was also reduced in the selected populations. Flies from the selected populations were increasingly lighter at eclosion than controls, with the reduction in dry weight at eclosion over 70 generations of selection being approximately 45% in males and 39% in females. Larval growth rate (dry weight at eclosion/development time) was also reduced in the selected lines over 70 generations, relative to controls, by approximately 32% in males and 24% in females. However, part of this relative reduction was due to an increase in growth rate of the controls populations, presumably an expression of adaptation to conditions in our laboratory. After 50 generations of selection had elapsed, a considerable and increasing pre- adult viability cost to faster development became apparent, with viability in the selected populations being about 22% less than that of controls at generation 70 of selection.

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