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Effect of Body Weight on Reproductive Fitness in Spodoptera Litura (Lepidoptera: Noctuidae)

Jin Xu

,

Peng Chen

,

Yong-He Li

Jin Xu 1

Peng Chen 2
Yong-He Li 3

  1. Yunnan Academy of Biodiversity, Southwest Forestry University, Kunming 650224, China; School of Agriculture, Yunnan University, Kunming 650091, China 1

  2. Yunnan Academy of Forestry, Kunming 650201, China 2

  3. School of Agriculture, Yunnan University, Kunming 650091, China 3

on Google Scholar
on PubMed

Pages: 1-7

DOI: 10.18488/journal.106.2018.31.1.7

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Article History:

Received: 16 July, 2018
Revised: 23 August, 2018
Accepted: 28 August, 2018
Published: 31 August, 2018


Abstract:

The exact nature and even existence of the balance between natural and sexual selection are still controversial. Body size is a key determinant of an organism’s ecological and physiological properties. It is widely accepted that selection for higher fecundity is the main force behind the selection for larger body size. However, there are conflicting selection pressures operating on body size of both sexes in many organisms, for instance, natural selection for higher survival might reduce body size. In the present study, we found that in the common cutworm moth, Spodoptera litura, female fecundity and fertility significantly increased with her body weight, while male body weight or female–male weight interaction had no effect on female reproductive output. Results of this study also showed that heavier parents have heavier male and female offspring than those from lighter parents. Although not statistically significant, offspring from heavy and light parents showed lower survival rate than those from average weight parents.
Contribution/ Originality
The paper's primary contribution is finding that heavier parents have heavier male and female offspring than those from lighter parents, i.e. body size is heritable in Spodoptera litura.

Keywords:

Spodoptera litura, Body weight, Reproductive fitness, Survival rate ,Conflicting selection, Sexual selection.

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Funding:

Research reported here was supported by projects from the National Natural Science Foundation Program of P.R. China (31760635; 31660208; 31560606), the Central Financial Forestry Science and Technology Promotion Demonstration Project (YUN[2017]TG08) and Research Team Construction Project of Yunnan Academy of Forestry (Research Team of Forest Diseases and Pests Control).

Competing Interests:

The authors declare that they have no competing interests.

Acknowledgement:

All authors contributed equally to the conception and design of the study.

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