Genetic background of body reserves in laying hens through backfat thickness phenotypinguse asterix (*) to get italics

Nicolas Bédère, Joëlle Dupont, Yannick Baumard, Christophe Staub, David Gourichon, Frédéric Elleboudt, Pascale Le Roy, Tatiana ZerjalPlease use the format "First name initials family name" as in "Marie S. Curie, Niels H. D. Bohr, Albert Einstein, John R. R. Tolkien, Donna T. Strickland"

2023

<p>In this study, we pursued three primary objectives: firstly to test and validate the phenotyping of backfat thickness as an indicator of the overall fatness of laying hens; secondly, to estimate genetic parameters for this trait; thirdly, to study the phenotypic and genetic relationships between this trait and other traits related to production and body composition. To address these questions, hens from two lines under divergent selection for residual feed intake, were phenotyped for body weight, body composition traits (backfat, total fat volume, and blood adipokines levels), and egg number. Linear mixed models enabled to estimate variance components and calculate genetic parameters. The two lines largely differed in body fatness: the efficient line had larger backfat and lower chemerin levels compared to the inefficient line. However, there were no significantly differences between the two lines concerning body weight, total fat volume, other blood adipokines levels (adiponectin, ghrelin, and visfatin), and egg production. The genetic parameter estimation revealed moderate heritability (0.38 and 0.42) for backfat and body weight, high heritability (higher than 0.80) for blood adipokines levels and low heritability (0.24 and 0.27) for egg production and total fat volume. The backfat and total fat volume were genetically highly and positively correlated (0.91). The body weight and total fat volume were also highly positively correlated (0.67). However, backfat and body weight were moderately positively correlated (0.39). The genetic correlation between backfat and egg number was moderate and negative. In conclusion, backfat could provide additional genetic information to that of the body weight as a selection criterion for body reserves. However, its correlation with laying performance should be taken into account to avoid undesired responses to selection.</p>

https://doi.org/10.57745/HUQOXWYou should fill this box only if you chose 'All or part of the results presented in this preprint are based on data'. URL must start with http:// or https://

https://doi.org/10.57745/HUQOXWYou should fill this box only if you chose 'Scripts were used to obtain or analyze the results'. URL must start with http:// or https://

body composition, body reserves, backfat thickness, ultrasonography, CT-scan, adipokines, genetic correlations, heritability, laying hens

NonePlease indicate the methods that may require specialised expertise during the peer review process (use a comma to separate various required expertises).

Animal genetics, Poultry, Statistical genetics

Hélène Gilbert [helene.gilbert@inrae.fr], Catherine Larzul [catherine.larzul@inrae.fr], Sandrine Grasteau [sandrine.grasteau@inrae.fr], Hervé Chapuis [herve.chapuis@inrae.fr], Henk Bovenhuis [henk.bovenhuis@wur.nl], Mario Calus [mario.calus@wur.nl], Jack Dekkers [jdekkers@iastate.edu], Anna Wolc [awolc@iastate.edu], Ilias Kyriazakis suggested: colleagues at Bristol University have done a lot on body reserves of hens. They might be able to help you, Julie Collet suggested: Sorry, I am not an expert on the subject and I don't know any... But if you need review on chicken behaviour I'd be happy to help!, Julie Collet suggested: Kind regards,, Julie Collet suggested: Julie, Ingrid David [ingrid.david@inra.fr] suggested: Sandrine grasteau (sandrine.grasteau@inrae.fr), Christopher MUKASA suggested: Prof .B. I. Nwagu, Christopher MUKASA suggested: binwagu@gmail.com, DEVINDER SADANA suggested: One suggestion, please:, DEVINDER SADANA suggested: Name : Dr. V. K. Saxena, DEVINDER SADANA suggested: Address : Director Research,, DEVINDER SADANA suggested: Bihar Animal Sciences University,, DEVINDER SADANA suggested: Bihar Veterinary College Campus,, DEVINDER SADANA suggested: Patna – 800014 (India), DEVINDER SADANA suggested: Expertise : POULTRY and breeds, DEVINDER SADANA suggested: E-Mail : drbasu2017@gmail.com | dr-basu-bih@gov.in, DEVINDER SADANA suggested: Phone : 0612-2227253, DEVINDER SADANA suggested: -.-.-.-.-.-.-.-.-.-., DEVINDER SADANA suggested: My own interest is on poultry breeds especially indigenous breeds [and BackYard Poultry], generally AnGR [Animal Genetic Resources] and local indigenous breeds., DEVINDER SADANA suggested: Thanks and Regards,, DEVINDER SADANA suggested: -Dr D K Sadana, DEVINDER SADANA suggested: India, Laurence Guilloteau suggested: I am sorry to only reply now but I was not in my office and I am not an appropriate reviewer for this type of study (no genetic background)., Laurence Guilloteau suggested: I could suggest my colleague Elisabeth Duval (elisabeth.duval@inrae.fr) if it is still time., Laurence Guilloteau suggested: Best Regards. Laurence Guilloteau

e.g. John Doe john@doe.com

No need for them to be recommenders of PCI Anim Sci. Please do not suggest reviewers for whom there might be a conflict of interest. Reviewers are not allowed to review preprints written by close colleagues (with whom they have published in the last four years, with whom they have received joint funding in the last four years, or with whom they are currently writing a manuscript, or submitting a grant proposal), or by family members, friends, or anyone for whom bias might affect the nature of the review - see the code of conduct

2023-07-27 17:09:10

Seyed Abbas Rafat