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Authors thank and acknowledge the support of the research technicians Silvia Rascon Fernandez and Lucas Marginedas Catalan.

Analysis of institutional authors

Riudavets, JAuthorLopes, M SAuthor

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Assessing the efficacy and generational stability of commercial transgenic maize resistance against key stored-product insect pests

Publicated to:Journal Of Pest Science. - 2025-03-04 (), DOI: 10.1007/s10340-025-01880-8

Authors: Parsons, J; Riudavets, J; Lopes, M S

Affiliations

IRTA, Sustainable Field Crops, Agronoms, Lleida, Spain - Author
IRTA, Sustainable Plant Protect Program, Cabrils, Barcelona, Spain - Author
Protecció Vegetal Sostenible . Producció Vegetal - Author

Abstract

Genetic resistance, particularly through transgenic Bt maize, has demonstrated high efficacy in pest control under field conditions. However, in storage conditions, maize is susceptible to different pest species, which compromises its quality. It is unknown how effectively the Bt maize functions in storage environments or if resistance is being inherited in later generations. This study investigates two commercial maize genotypes: a transgenic genotype expressing the Cry1Ab protein and its near-isoline counterpart. It utilizes commercial seeds of both genotypes (F1), along with seeds obtained from field-grown transgenic and near-isoline plants (F2), which represent the seeds stored by farmers and the agricultural industry. The aim is to assess their vulnerability to common insect pests that affect stored products. By assessing grain damage and insect population dynamics, we identify differences in resistance among these different maize genotypes and generations. Our findings show that transgenic maize exhibits strong resistance against Sitotroga cerealella but lower resistance against Sitophilus zeamais. The impact of Oryzaephilus surinamensis on both genotypes was negligible. Additionally, the resistance diminishes in the F2 generation. With S. cerealella the F2 transgenic experienced 55% more damage compared to the F1. Similarly, in the case of S. zeamais, the F2 maize produced five times more frass than the F1, highlighting a significant reduction in resistance. This research identifies the resistance characteristics of maize, highlighting the most suitable traits for assessing pest resistance in stored maize. It emphasizes the need for sustainable pest control with genetic resistance, ensuring long-term protection of stored grains, and minimizing post-harvest losses.

Keywords

Bt maizeF1 hybriGrainLossePest resistancePost-harvest pestsStored productsWeight-loss

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Journal Of Pest Science due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2025, it was in position 6/109, thus managing to position itself as a Q1 (Primer Cuartil), in the category Entomology. Notably, the journal is positioned above the 90th percentile.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-06-19:

  • Scopus: 2

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-19:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 3.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 3 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 1.
  • The number of mentions on the social network X (formerly Twitter): 1 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: http://hdl.handle.net/20.500.12327/3755

Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (Parsons, J) and Last Author (DA SILVA LOPES, MARTA).

the author responsible for correspondence tasks has been Parsons, J.