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Developmental Differences on the Internal Reproductive Systems between the Prediapause and Prereproductive Riptortus pedestris Adults

Hubei Key Laboratory of Insect Resources Utilization and Sustainable Pest Management, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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Insects 2020, 11(6), 347; https://doi.org/10.3390/insects11060347
Received: 5 May 2020 / Revised: 30 May 2020 / Accepted: 3 June 2020 / Published: 4 June 2020
Riptortus pedestris (Heteroptera: Alydidae), an important crop pest, is capable of entering reproductive adult diapause under short-day photoperiods. Though the physiological aspects of adult diapause have been well studied in this species, little is known about its morphological development. In the present study, the adult females are discriminated as prediapause and prereproductive based on the absence and presence of mature oocytes in ovarioles, respectively. We also measured the morphological development of vitellarium and lateral oviduct in females, and the accessory gland, ejaculatory duct, and testes in males of both prereproductive and prediapause adults. Our results revealed that there is a clear significant difference in the reproductive development of prediapause and prereproductive insects. Moreover, the internal morphology of reproductive organs was suppressed in prediapausebugs compared to prereproductive bugs, and the insects developedthe reproductive parts as newly emerged adults. The above findings provide basic knowledge on the characterization of diapause and reproductive R. pedestris adults, which would be applicable to molecular investigations. View Full-Text
Keywords: Riptortus pedestris; reproductive diapause; photoperiod; internal reproductive organ; morphology Riptortus pedestris; reproductive diapause; photoperiod; internal reproductive organ; morphology
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Hafeez, A.; Li, B.; Liu, W.; Atiq, M.N.; Wang, X.-P. Developmental Differences on the Internal Reproductive Systems between the Prediapause and Prereproductive Riptortus pedestris Adults. Insects 2020, 11, 347.

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