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Parental effects in Pieris rapae in response to variation in food quality: adaptive plasticity across generations?
 

Summary: Parental effects in Pieris rapae in response to variation
in food quality: adaptive plasticity across generations?
K A R I N R O T E M 1
, A N U R A G A . A G R A W A L 1
and L A I M A
K O T T 2 1
Department of Botany, University of Toronto and 2
Department of Plant Agriculture, University of Guelph,
Canada
Abstract. 1. Herbivores using seasonal resources must cope with variation in the
quality of their host plants. The effects of variation in protein concentration of
artificial diet and glucosinolate concentration in canola, Brassica napus, on Pieris
rapae parental and progeny growth were investigated.
2. The hypothesis that parents respond to variation in food quality by altering
the phenotype of their progeny to enhance progeny fitness was tested. Consistent
with previous studies, P. rapae was not affected strongly by variation in the
protein concentration of artificial diet and had equal mass on completing
development.
3. The mass of individual eggs of P. rapae progeny was correlated negatively with
the amount of protein in the diet on which parents fed. Moreover, mothers reared

  

Source: Agrawal, Anurag - Department of Ecology and Evolutionary Biology & Entomollogy, Cornell University

 

Collections: Environmental Sciences and Ecology