Potential for Genetic Improvement of Resistance to Perkinsus olseni in the Manila Clam, Ruditapes philippinarum, Using DNA Parentage Assignment and Mass Spawning

Abstract

were found between growth-associated traits and parasite load. Overall, the preliminary results provided by this study show high potential for selecting clams resistant to parasite load. Breeding for resistance may help limit the negative effects of climate change on clam production, as the prevalence of the parasite is predicted to increase under a future scenario of higher temperatures. Finally, the limited genetic correlation between resistance and growth suggests that breeding programs could incorporate dual selection without negative interactions.

Animal board invited review: Widespread adoption of genetic technologies is key to sustainable expansion of global aquaculture

“…Genetic technologies are generally underutilised in bivalve shellfish relative to major finfish and crustacean species, and this is the case for Manila clam. There have however been studies into the genetic basis of production traits, genomic tools developed, and moves towards the development of commercial breeding programmes (Smits et al, 2020). In part, this reflects the ease of obtaining abundant wild seed, and the very low individual value of each animal (Nascimento-Schulze et al, 2021).…”

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“…Similares La relación entre la expresión infecciosa de P. marinus y algunos parámetros está bien documentada. La temperatura y la salinidad son los dos factores más reconocidos por inducir la infección de P. marinus en bivalvos (Villalba et al, 2004;Cáceres-Martínez & Vázquez-Yeomans, 2013;Smits et al, 2020). El mayor nivel de infección -asociado también a mortalidades-, se relaciona con el final del verano, cuando la temperatura del agua se mantiene por encima de 25 °C; y/o al aumento en la concentración de la salinidad (>25 g L -1 ) (Ramos-Queiroga et al, 2016), sin embargo, ambos parámetros pueden actuar separadamente en el proceso infeccioso.…”

Transcriptome characterization of the common cockle (Cerastoderma edule) after exposure to aMarteilia cochilliaoutbreak

“…Understanding the molecular basis of the differences responsible for being susceptible or resistant to a particular disease and identifying molecular markers of resistance can help to fight against mollusc diseases. Recently, research effort has been focused on the identification of molecular markers of disease resistance, through transcriptomics (He et al, 2012; Meistertzheim et al, 2014; Nikapitiya et al, 2014; Nie et al, 2015; Wang et al, 2016; Gutierrez et al, 2018, 2020; La Peyre et al, 2019; De Lorgeril et al, 2020; Farhat et al, 2020; Proestou and Sullivan, 2020; Hasanuzzaman et al, 2020), proteomics (Simonian et al, 2009; Fernández-Boo et al, 2016; de la Ballina et al, 2018; Vaibhav et al, 2018; Smits et al, 2020; Leprêtre et al, 2021) and population genomics approaches (Vera et al, 2019; Sambade et al, 2022). This information could be eventually used for marker-assisted selection (MAS) programs to increase resilience against pathogens.…”