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Journal of Integrative Agriculture  2020, Vol. 19 Issue (6): 1447-1457    DOI: 10.1016/S2095-3119(19)62767-X
Special Focus: Physiology and interaction of insects with environmental factors Advanced Online Publication | Current Issue | Archive | Adv Search |
Reproductive polyphenism and its advantages in aphids: Switching between sexual and asexual reproduction
YAN Shuo1, WANG Wan-xing2, SHEN Jie1 
1 Department of Entomology/MOA Key Lab of Pest Monitoring and Green Management, College of Plant Protection, China Agricultural University, Beijing 100193, P.R.China
2 Key Lab of Biology and Genetic Improvement of Root and Tuber Crops, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
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Abstract  
Reproductive polyphenism, which allows one genotype to produce sexual and asexual morphs, is an extreme case of phenotypic plasticity and is commonly observed in aphids.  Aphids are typical species that switch these reproductive modes, and the pathway orientation is triggered by the environmental conditions (mainly photoperiod and temperature).  The typical annual life of aphids includes a succession of parthenogenetic generations during the spring and summer and a single sexual generation in autumn.  In this review, we describe how the environmental cues orientate the reproductive mode of aphids from photoperiodic perception to endocrine regulation, and how juvenile hormones may act on the target cells (oocytes) to initiate the gametogenesis and embryogenesis in sexual and asexual reproduction.  We also discuss the paradox of sex, especially the advantages of sexual reproduction in aphids.  With the recent development of genomic resources in aphids, many potential genes involved in the reproductive polyphenism will enter the public’s awareness.  In particular, we describe a novel RNAi method in aphids, which may provide a molecular technique for determining the developmental fate and multiple reproductive strategies.
 
Keywords:  aphids        parthenogenesis        embryogenesis        gametogenesis        photoperiodism  
Received: 06 May 2019   Accepted:
Fund: This work was supported by the National Key Research and Development Program of China (2018YFD0200804 and 2017YFD0201200).
Corresponding Authors:  Correspondence SHEN Jie, E-mail: shenjie@cau.edu.cn   
About author:  YAN Shuo, E-mail: yanshuo2011@foxmail.com;

Cite this article: 

YAN Shuo, WANG Wan-xing, SHEN Jie. 2020. Reproductive polyphenism and its advantages in aphids: Switching between sexual and asexual reproduction. Journal of Integrative Agriculture, 19(6): 1447-1457.

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