Geographic variation in diapause induction and termination of the cotton bollworm, Helicoverpa armigera Hübner (Lepidoptera: Noctuidae)

Chen, Yuansheng; Chen, Chao; He, Hong‐Ping; Xia, Qin‐Wen; Xue, Fang‐Sen

doi:10.1016/j.jinsphys.2013.06.002

Cited by 44 publications

(32 citation statements)

References 40 publications

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“…2012; Chen et al. 2013). Similarly, the physiology of diapause has been shown to differ among populations from different climates, although most studies have not determined whether these differences are genetic or plastic in nature.…”

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confidence: 99%

Rapid adaptive evolution of the diapause program during range expansion of an invasive mosquito

et al. 2020

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In temperate climates, the recurring seasonal exigencies of winter represent a fundamental physiological challenge for a wide range of organisms. In response, many temperate insects enter diapause, an alternative developmental program, including developmental arrest, that allows organisms to synchronize their life cycle with seasonal environmental variation. Geographic variation in diapause phenology contributing to local climatic adaptation is well documented. However, few studies have examined how the rapid evolution of a suite of traits expressed across the diapause program may contribute to climatic adaptation on a contemporary timescale. Here, we investigate the evolution of the diapause program over the past 35 years by leveraging a “natural experiment” presented by the recent invasion of the Asian tiger mosquito, Aedes albopictus, across the eastern United States. We sampled populations from two distinct climatic regions separated by 6° of latitude (∼700 km). Using common‐garden experiments, we identified regional genetic divergence in diapause‐associated cold tolerance, diapause duration, and postdiapause starvation tolerance. We also found regional divergence in nondiapause thermal performance. In contrast, we observed minimal regional divergence in nondiapause larval growth traits and at neutral molecular marker loci. Our results demonstrate rapid evolution of the diapause program and imply strong selection caused by differences in winter conditions.

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confidence: 99%

Rapid adaptive evolution of the diapause program during range expansion of an invasive mosquito

et al. 2020

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“…A limited ability to induce diapause under the conditions examined here should however be interpreted with some caution as it is possible T. leucotreta may nevertheless enter diapause in the wild, but our experimental methodology did not reproduce the precise set of abiotic conditions that trigger diapause under natural conditions (Tauber and Tauber ; Hunter and McNeil ) or there may be significant geographic variation in diapause ability among populations (Chen et al. ) that we could not explore in the present study design. Another potential methodological limitation is that, in some Tortricidae species, the parental generation must experience a specific set of altered seasonal conditions for the F1 generation to be able to enter diapause (Mousseau and Dingle ; Hunter and McNeil ).…”

Section: Discussionmentioning

confidence: 87%

“…Noctuidae (Phillips and Newsom ; Chen et al. ), including the Pyralidae (Yao and Fukaya ) and the Tortricidae (Lyon et al. ; Sieber and Benz )].…”

Section: Introductionmentioning

confidence: 99%

Physiological traits suggest limited diapause response in false codling moth, Thaumatotibia leucotreta (Lepidoptera: Tortricidae)

Terblanche

Jager

Boardman

et al. 2014

J Applied Entomology

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The ability of a pest insect species to enter diapause, a physiological state of dormancy, has significant implications for population dynamics and pest management practises in agricultural landscapes. The false codling moth Thaumatotibia leucotreta is a major pest of deciduous and citrus fruit in southern Africa and a quarantine pest of international concern. Apart from an early field assessment that may have been compromised by taxonomic uncertainty surrounding cryptic developing life stages, no studies have investigated diapause induction within an experimental framework for this species, and none to date have used a suite of physiological traits potentially indicative of the diapause state. Here, we subjected larvae to cooling and shortening day length over a period of 14 days [Diapause Treatment (DT) group] relative to a similar-aged control (CON) group held at optimal rearing conditions (25°C, 12 : 12 L : D) and tested if physiological traits, including resting metabolic rate, body freezing temperature (=supercooling point, equivalent to the low-temperature mortality threshold) and body condition (body mass, body lipid and water content) varied in a direction that may be reflective of diapause induction. Mean metabolic rate in DT larvae was 0.044 ml CO 2 /h (mean mass: 52.7 mg), which was significantly higher than in CON larvae [0.025 ml CO 2 /h, mean mass: 51.5 mg (P = 0.04)]. Supercooling points were not statistically lower in the CON group than in DT larvae (DT:À15.6 AE 1.5°C; CON: À16.4 AE 2.8°C; P = 0.33). Measures of body size, body condition and resting water loss rates remained similar between groups. These results support the conclusion of early field observations that T. leucotreta does not undergo diapause that has significant implications for the management of the species.

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“…In addition, diapause response to both photoperiod and temperature is likely to be genetically different among geographical isolated populations that are located at different latitudes. For example, diapause termination of the multivoltine moth Helicoverpa armigera (Lepidoptera: Noctuidae) is highly sensitive to photoperiod in northern populations and temperature dependent in southern populations (Chen et al, 2013). However, Filchak et al (2001) found no effect of photoperiod on the genetics of R. pomonella.…”

Section: Photoperiod Effects On Diapause Traitsmentioning

confidence: 99%

Effects of photoperiod and relative humidity on diapause termination and post-winter development ofRhagoletis cerasipupae

Moraiti

Köppler

Vogt

et al. 2020

Bull. Entomol. Res.

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The European cherry fruit fly, Rhagoletis cerasi (Diptera: Tephritidae), is a univoltine species that undergoes obligatory summer–winter diapause at pupal stage in the soil (2–5 cm) beneath host trees. To study the effects of photoperiod and relative humidity on diapause termination and post-winter developmental duration of R. cerasi, pupae collected from Dossenheim (Germany) were exposed to different photoperiod or relative humidity regimes during a chilling period ranging from 2 to 8.5 months. Specifically, pupae were exposed to four photoperiod regimes: (a) light conditions (24L:00D), (b) dark conditions (00L:24D), (c) short photoperiod (08L:16D) and (d) long photoperiod (16L:08D), as well as to three relative humidity regimes: (a) low (40% RH), (b) medium (60% RH) and (c) high (70–80% RH). Data revealed that relative humidity is not a significant predictor of diapause termination, but it affects the post-winter developmental period. Higher relative humidity promotes post-winter pupae development. On the other hand, photoperiod significantly affected both diapause termination and post-winter development of R. cerasi pupae. Light conditions (24L:00D) accelerate adult emergence, particularly for females. Regardless of the photoperiod (24L:00D, 00L:24D, 08L:16D), rates of adult emergence were high (>75%) for chilling intervals longer than 6.5 months. Nonetheless, exposure to a long day photoperiod (16L:08D), during chilling, dramatically reduced the proportion of adult emergence following 6 months exposure to chilling. Our findings broaden the understanding of factors regulating diapause responses in European cherry fruit fly, local adaptation and synchronization of adult emergence with the ripening period of major hosts.

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Geographic variation in diapause induction and termination of the cotton bollworm, Helicoverpa armigera Hübner (Lepidoptera: Noctuidae)

Cited by 44 publications

References 40 publications

Rapid adaptive evolution of the diapause program during range expansion of an invasive mosquito

Rapid adaptive evolution of the diapause program during range expansion of an invasive mosquito

Physiological traits suggest limited diapause response in false codling moth, Thaumatotibia leucotreta (Lepidoptera: Tortricidae)

Effects of photoperiod and relative humidity on diapause termination and post-winter development ofRhagoletis cerasipupae

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