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Author (up) Harano, T.; Miyatake, T openurl 
  Title Independence of genetic varation between circadian rhythm and development time in the seed beetle, Callosobruchus chinensis Type Journal Article
  Year 2011 Publication Journal of Insect Physiology Abbreviated Journal J. Insect Physiol.  
  Volume 57 Issue 3 Pages 415-420  
  Keywords  
  Abstract A positive genetic correlation between periods of circadian rhythm and developmental time supports the hypothesis that circadian clocks are implicated in the timing of development. Empirical evidence for this genetic correlation in insects has been documented in two fly species. In contrast, here we show that there is no evidence of genetic correlation between circadian rhythm and development time in the adzuki bean beetle, Callosobruchus chinensis. This species has variation that is explained by a major gene in the expression and period length of circadian rhythm between strains. In this study, we found genetic variation in development time between the strains. The development time was not covaried with either the incidence or the period length of circadian rhythm among the strains. Crosses between strains suggest that development time is controlled by a polygene. In the F(2) individuals from the crosses, the circadian rhythm is attributable to allelic variation in the major gene. Across the F(2) individuals, development time was not correlated with either the expression or the period length of circadian rhythm. Thus, we found no effects of major genes responsible for variation in the circadian rhythm on development time in C. chinensis. Our findings collectively give no support to the hypothesis that the circadian clock is involved in the regulation of development time in this species.  
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  Call Number Roanoke @ watkinson @ Serial 34  
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