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Pectoral angle: a glance at a traditional phenotypic trait in chickens from a new perspective

Vakhrameev, Anatoly B., Narushin, Valeriy G., Larkina, Tatiana A., Barkova, Olga Y., Peglivanyan, Grigoriy K., Dysin, Artem P., Dementieva, Natalia V., Shcherbakov, Yuri S., Pozovnikova, Marina V., Griffin, Darren K., and others. (2023) Pectoral angle: a glance at a traditional phenotypic trait in chickens from a new perspective. The Journal of Agricultural Science, 161 (4). pp. 606-615. ISSN 0021-8596. E-ISSN 1469-5146. (doi:10.1017/S002185962300045X) (KAR id:103268)

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In meat-type poultry breeding, pectoral angle (PA) is a conventional anatomical indicator for changes in body conformation and meat traits; its correlation to egg performance is however deemed controversial. In this context, we revisited, assessed and put forward evidence for the usefulness of this classic phenotypic variable and its specific integrative index of pectoral angle-to-body weight ratio (PA/BW). Specifically, we identified respective correlations and used them for distinguishing the major categories (production types) of diverse chicken breeds under the traditional classification model (TCM) and genotypic clustering models of the global chicken gene pool subdivision. Also, the usefulness of the supplementary integrative egg mass yield index (EMY) for this objective was demonstrated. Because of estimating the total mass of eggs laid (i.e. egg number times egg weight), EMY can serve as an indicator of egg production. Direct approximation of EMY values by PA and BW values did not lead to significant correlation dependences between these indicators in each of the four breed utility types according to TCM. However, using the ratio of PA to BW, instead of PA and BW alone, resulted in significant correlation of EMY with PA/BW, allowing for distinction between egg-type and non-productive breeds. The validity of the proposed correlation-based models was supported by PCA and Neighbor Joining clustering analyses. Collectively, we suggested that PA can be a potentially correlated trait for selecting hens and roosters in breeding flocks to boost egg yield. These results can also be applied to chicken breeding as well as conservation- and phenome-related research.

Item Type: Article
DOI/Identification number: 10.1017/S002185962300045X
Uncontrolled keywords: chicken breeds; egg production; integrative indices; pectoral angle; phenome; phenotypic traits
Subjects: Q Science > QH Natural history > QH324.2 Computational biology
Q Science > QH Natural history > QH426 Genetics
Q Science > QH Natural history > QH75 Conservation (Biology)
S Agriculture > SF Animal culture
Divisions: Divisions > Division of Natural Sciences > Centre for Interdisciplinary Studies of Reproduction
Divisions > Division of Natural Sciences > Biosciences
Signature Themes: Food Systems, Natural Resources and Environment
Depositing User: Mike Romanov
Date Deposited: 12 Oct 2023 09:46 UTC
Last Modified: 12 Apr 2024 08:38 UTC
Resource URI: (The current URI for this page, for reference purposes)

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