Evolutionary Shift of Insect Diapause Strategy in a Warming Climate: An Intra-Population Evidence from Asian Corn Borer
文献类型: 外文期刊
作者: Wang, Lianxia;Liu, Kaiqiang;Zhao, Xiumei;Zhang, Tiantao;Yuan, Ming;He, Kanglai
作者机构:
关键词: Ostrinia furnacalis;voltinism;diapause;model;climate warming
期刊名称: BIOLOGY-BASEL
ISSN:
年卷期: 2023 年 12 卷 6 期
页码:
收录情况: SCIE(2023版)
摘要: Simple Summary An evolutionary shift in insect diapause strategy has been revealed in a historically univoltine population of Ostrinia furnacalis, a commonly facultative diapause species. Warmer climates are likely to stimulate facultative individuals in the population to shift from univoltinism to bivoltinism due to the compensatory effect of elevated temperature. Climate warming has driven the population to evolve toward dominantly bivoltine or even trivoltine, further leading to more severe damage. To accurately predict phenology and population dynamics in O. furnacalis, it is imperative to account for both the proportions of different diapause individuals with the population and temperature. Herbivorous insects having variable numbers of generations annually depending on climate and day length conditions are increasingly breeding additional generations driven by elevated temperature under the scenario of global warming, which will increase insect abundance and result in more frequent damage events. Theoretically, this relies on two premises, i.e., either an evolutionary shift to facultative diapause for an insect behaving an obligatory diapause or developmental plasticity to alter voltinism productively for an insect with facultative diapause before shortening photoperiods inducing diapause. Inter-population evidence supporting the premise (theory) comes primarily from a model system with voltinism linked to thermal gradients across latitude. We examined the intra-population evidence in the field (47 & DEG;24 & PRIME; N, 123 & DEG;68 & PRIME; E) with Ostrinia furnacalis, one of the most destructive pests, on corn in Asia and Pacific islands. The species was univoltine in high latitudinal areas (& LE;46 & DEG; N). Divergence of the diapause feature (obligatory and facultative) was observed within the field populations from 2016 to 2021. Warmer climates would provoke more facultative diapause individuals to initiate a second generation, which will significantly drive the population to evolve toward facultative diapause (multi-voltinism). Both divergent diapause and temperature must be considered for accurate prediction of phenology and population dynamics in ACB.
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