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Lopes TBF, Aguiar RCM, de Souza RF, Nascimento CC, Dionísio JF, Mantovani MS, Semprebon SC, da Rosa R. Influence of temperature variation on gene expression and cocoon production in Bombyx mori Linnaeus, 1758 (Lepidoptera: Bombycidae). Comp Biochem Physiol Part D Genomics Proteomics 2023; 47:101111. [PMID: 37516100 DOI: 10.1016/j.cbd.2023.101111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 07/14/2023] [Accepted: 07/14/2023] [Indexed: 07/31/2023]
Abstract
Silkworms (Bombyx mori) are lepidopterans of economic importance for global silk production. However, factors that directly affect the yield and quality of silkworm cocoon production, such as diseases and temperature fluctuations, cause great economic losses. Knowing how they respond to rearing temperature during the most critical stage of their life cycle (i.e., fifth instar) could provide information on their adaptation and improve silk production. In the current work, we analyzed transcriptional data from two groups of B. mori that were reared at 26 °C and 34 °C throughout the fifth instar. The silkworms and cocoons were weighed. In total, 3115 transcripts were differentially expressed (DE; including 1696 down-regulated and 1419 up-regulated) among the 29,157 sequences found by transcriptome assembly. We emphasize the genes associated with immunological response, transcription factors, silk biosynthesis, and heat shock proteins, among the DE transcripts in response to the temperature conditions. Silkworms reared at 34 °C presented a reduced mean body weight (-0.944 g in comparison to the 26 °C group), which had a direct impact on the weight of cocoons formed and the silk conversion rate. These changes were statistically significant when compared to silkworms reared at 26 °C. Mortality rates (6 and 9 %, at 26 °C and 34 °C, respectively) were similar to those obtained in breeding fields. The findings provide information on the biological processes involved in the temperature response mechanism of silkworms, as well as information that may be used in future climatization processes at rearing facilities and in breeding for improved thermotolerance.
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Affiliation(s)
- Thayná Bisson Ferraz Lopes
- Laboratório de Citogenética e Entomologia Molecular, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.
| | - Rachel Colauto Milanezi Aguiar
- Laboratório de Citogenética e Entomologia Molecular, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Rogério Fernandes de Souza
- Laboratório de Bioinformática, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.
| | - Cristianne Cordeiro Nascimento
- Departamento de Design Gráfico, Centro de Educação, Comunicação e Artes, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.
| | - Jaqueline Fernanda Dionísio
- Laboratório de Citogenética e Entomologia Molecular, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Mario Sergio Mantovani
- Laboratório de Genética Toxicológica, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.
| | - Simone Cristine Semprebon
- Laboratório de Genética Toxicológica, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Renata da Rosa
- Laboratório de Citogenética e Entomologia Molecular, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.
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