Reproductive patterns of the European corn borer (<i>Ostrinia nubilalis</i>) in Alberta

Lee, Dennis A.; Spence, John R.

doi:10.1139/z87-268

Cited by 5 publications

(10 citation statements)

References 26 publications

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“…Differences between the strains probably reflect differences in the original source populations in Europe (Klun et al 1975;Hudon et al 1989). The Z strain differentiates rapidly in response to new habitats (Lee and Spence 1987) and, in some areas, is divided into two voltinism races that show partial overlap (McLeod 1978;Roelofs et al 1985).…”

Section: Ostrinia Nubilalis Hubner Pheromone Strainsmentioning

confidence: 99%

Sex-Linked Genes and Species Differences in Lepidoptera

1994

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The Canadian Entomologist 126: 807-818 (1994) I review reports on the genetic basis for species differences in the Lepidoptera. In the six best-studied species complexes, more than half of all ecological, behavioral, or physiological differences among species are controlled by X-linked genes. Because Lepidoptera have about 30 pairs of chromosomes, this finding clearly indicates strong bias toward X-linkage of genes for species differences. The proportion of X-linked species differences ranges from complete X-linkage in Colias butterflies, to almost none in Yponomeuta moths. Four other complexes all have at least one X-linked gene that is crucial to species differences, including the Choristoneurafumiferana Clemens, Papilio glaucus L., and Papilio machaon L. species groups, and Ostrinia nubilalis Hiibner pheromone strains. The mechanisms that account for this phenomenon are open to speculation. Nonetheless, an interesting implication of disproportionate X-linkage is that reproductive isolation may frequently arise by selection on linkage complexes, rather than as a random byproduct of evolution in geographically isolated populations. If confirmed, the bias toward X-linked species differences may also help efforts to find characters that distinguish host races and sibling species, as well as provide an avenue by which genes crucial to speciation can be more easily mapped and characterized at the molecular level. Sperling, F.A.H. 1994. Genes reliks aux chromosomes sexuels et diffkrences spkcifiques chez les Upidopthes. The Canadian Entomologist 126: 807-818. Resume J'ai fait la synthbse des donnks sur l'origine gCnCtique des diffkrences spCcifiques chez les Upidoptbres. Chez les six complexes d'espbces les plus CtudiCs, plus de la moitiC de toutes les differences Ccologiques, comportementales et physiologiques entre les espbces sont attribuables B des gbnes liCs au chromosome X. Comme les LCpidopthres ont environ 30 paires de chromosomes, cette constatation indique clairement que les differences spkcifiques sont fortement reliCes au linkage B 1'X des diffkrents gbnes. La proportion des diffkrences spCcifiques likes h 1'X va de 100% chez les espbces de Colias, B prbs de 0% chez les papillons nocturnes du genre Yponomeuta. Quatre autres complexes ont tous au moins un gbne liC B 1'X qui est essentiel aux diffkrences spCcifiques, notamrnent les groupes d'espkes de Choristoneura furniferana Clemens, de Papilio glaucus L. et de Papilio machaon L., et les lignks d'ostrinia nubilalis Hiibner diffCrenciCes par leurs phCromones. Les mCcanismes responsables de ce phCnombne sont mal connus. Cependant, l'un des corollaires intCressants de l'hypothbse d'un linkage B l'X disproportionnC suppose que l'isolement gCnCtique est souvent le rCsultat de la sClection de complexes de linkage plut6t que le produit alCatoire de l'kolution chez des populations isolCes gkographiquement. Si cette hypothbse est confirmCe, l'attribution des diffkrences spCcifiques aux gbnes liCs B 1'X peut Cgalement rendre plus facile la dktermination de carac...

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Section: Ostrinia Nubilalis Hubner Pheromone Strainsmentioning

confidence: 99%

Sex-Linked Genes and Species Differences in Lepidoptera

1994

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“…The differences we found suggested that females from the BV line, which is a population that mates in the middle of the summer (univoltine), were less impacted by temperature than the DV line, which is bivoltine and mates twice (both earlier and later in the year). Previous studies found that the bivoltine GE line was more cold‐tolerant than the BV line (Wadsworth et al., 2020 ) and that temperature effects on fecundity may differ among populations (Lee & Spence, 1987 ). The BV line females also appeared to shift their investment in eggs less than females from other populations (Figure 3c ), although female line was not significant in this analysis.…”

Section: Discussionmentioning

confidence: 97%

“…The change we found in reproductive investment at elevated temperatures may be an adaptive response to temperature in order to limit the costs of reproduction, by investing more in reproduction earlier in life to offset higher mortality or shorter life spans at high temperatures. In many insects, including corn borers, there is a trade‐off between fecundity early in life and female longevity, with females that lay more eggs early in oviposition having shorter life spans (Lee & Spence, 1987 ; Reznick, 1985 ). Our results are consistent with investment in reproduction being at its maximum for within‐line pairs, but at elevated temperatures, females may choose to invest more eggs in a mating with a less preferred mate rather than reserving resources or waiting for more highly preferred mate.…”

Section: Discussionmentioning

confidence: 99%

“…Both males and females may be selective of mates and invest differentially in mates in the European corn borer. European corn borer females typically mate 1–3 times over their approximately 14‐day adult life, with the majority of females tending to mate once and males typically mating over 3 times (Elliott, 1977 ; Fadamiro & Baker, 1999 ; Hinton & Andow, 2003 ; Lee & Spence, 1987 ). Precopulatory female choice is mainly expressed in corn borers by a female moving away to reject a male or limiting access to her abdomen (Dopman et al., 2010 ; Farrell & Andow, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

“…Both males and females may be selective of mates and invest differentially in mates in the European corn borer. European corn borer females typically mate 1-3 times over their approximately 14day adult life, with the majority of females tending to mate once and males typically mating over 3 times (Elliott, 1977;Fadamiro & Baker, 1999;Hinton & Andow, 2003;Lee & Spence, 1987).…”

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confidence: 99%

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Elevated temperature increases reproductive investment in less preferred mates in the invasive European corn borer moth

Enos

Kozak

2021

Ecology and Evolution

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Rapidly changing environments may weaken sexual selection and lead to indiscriminate mating by interfering with the reception of mating signals or by increasing the costs associated with mate choice. If temperature alters sexual selection, it may impact population response and adaptation to climate change. Here, we examine how differences in temperature of the mating environment influence reproductive investment in the European corn borer moth (Ostrinia nubilalis). Mate preference in this species is known to be related to pheromone usage, with assortative mating occurring between genetically distinct E and Z strains that differ in the composition of female and male pheromones. We compared egg production within and between corn borer lines derived from four different populations that vary in pheromone composition and other traits. Pairs of adults were placed in a mating environment that matched the pupal environment (ambient temperature) or at elevated temperature (5°C above the pupal environment). At ambient temperature, we found that within‐line pairs produced eggs sooner and produced more egg clusters than between‐line pairs. However, at elevated temperature, between‐line pairs produced the same number of egg clusters as within‐line pairs. These results suggest that elevated temperature increased investment in matings with typically less preferred, between‐line mates. This increased investment could result in changes in gene flow among corn borer populations in warming environments.

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Temperature impacts how sugar resources alter reproductive investment in the European corn borer moth

Enos,

Velikaneye,

Kozak

2023

Environmental Entomology

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Investment of resources in reproduction can be based on individual state, environmental conditions, and perceived mate quality. Changing climates impact many aspects of the environment by increasing temperature, decreasing precipitation, and altering resource availability. Access to high-quality resources is known to improve survival under elevated temperatures, but its effects on reproduction in warming environments are largely unexplored. Here, we investigate the effects of elevated temperature and sugar resources on reproductive output within and between E- and Z-pheromone strains of the European corn borer moth [Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae)]. Corn borers prefer mates from their own strain, with reproductive output being highest for within-strain pairs. In this experiment, mating pairs were provided with a 20% sugar solution while exposed to either ambient (23 °C) or elevated (28 °C) temperatures. We measured reproductive investment as the total number of egg clusters laid 3 days after pairing. We found that at ambient temperature, sugar supplementation resulted in high investment across all pairs, including with usually unpreferred mates. However, when sugar was provided at elevated temperature, more egg clusters were laid in pairs with preferred (within-strain) mates as compared to less preferred (between-strain) mates. These results differ from temperature effects in the absence of sugar and suggest that the effects of sugar on reproductive investment in less preferred mates depend on temperature. Changes in investment may be due to differences in the allocation of extra resources to thermoregulation at elevated temperatures. Our results suggest the possibility of interactive effects of temperature and resources on sexual selection.

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Reproductive patterns of the European corn borer (Ostrinia nubilalis) in Alberta

Cited by 5 publications

References 26 publications

Sex-Linked Genes and Species Differences in Lepidoptera

Sex-Linked Genes and Species Differences in Lepidoptera

Elevated temperature increases reproductive investment in less preferred mates in the invasive European corn borer moth

Temperature impacts how sugar resources alter reproductive investment in the European corn borer moth

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