How low can you go? Broiler breast muscle possesses a mitochondrial content of just 2%

IF 0.8 4区农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Acta Agriculturae Scandinavica Section A-Animal Science Pub Date : 2023-10-05 DOI:10.1080/09064702.2023.2262470

Elham A. Soumeh, Walter G. Bottje, Nicholas J. Hudson

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引用次数: 0

Abstract

ABSTRACTIn 1977 the pectoralis major (breast) muscle mitochondrial content of domestic broiler chickens, Gallus gallus domesticus, was estimated at 4.1%. However, in the subsequent ∼45 years broilers have been further modified by sustained intensive genetic selection on feed conversion efficiency and breast muscle mass. With a view to understanding the metabolic implications of this historic selection – and also laying a foundation to better interpret current commercial performance – we quantitated the cellular bioenergetic structure of modern broilers. The breast muscle of 4 64 d old Ross308 broilers was subject to morphometric analysis based on transverse Transmission Electron Microscopy (TEM) images. This approach determined an average mitochondrial content, diameter and circularity ratio of 2.1%, 0.42 µm and 0.72, respectively. Broiler breast mitochondrial content has thus approximately halved in the last 45 years and represents one of the lowest contents recorded for the muscle of any eukaryotic species.KEYWORDS: Musclemitochondriachicken Disclosure statementNo potential conflict of interest was reported by the author(s).

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你能走多低?肉鸡胸肌的线粒体含量仅为2%

1977年，家肉鸡(Gallus Gallus domestic)胸大肌线粒体含量估计为4.1%。然而，在随后的45年里，通过持续的密集遗传选择，肉鸡在饲料转化率和胸肌质量方面进行了进一步的改良。为了理解这一历史性选择对代谢的影响，并为更好地解释当前的商业表现奠定基础，我们对现代肉鸡的细胞生物能量结构进行了量化。采用横向透射电镜(TEM)对4只64日龄Ross308肉鸡的胸肌进行形态计量学分析。该方法测定的线粒体平均含量、直径和圆度比分别为2.1%、0.42µm和0.72µm。因此，在过去的45年中，肉鸡乳房线粒体含量大约减少了一半，是真核生物物种肌肉中记录的最低含量之一。关键词:肌肉线粒体鸡披露声明作者未报告潜在的利益冲突。

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来源期刊

Acta Agriculturae Scandinavica Section A-Animal Science 农林科学-奶制品与动物科学

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： Acta Agriculturæ Scandinavica, Section A – Animal Science publishes results of original research in animal science and their applications related to the following topics: -Animal breeding and genetics -Molecular genetics -Animal physiology and reproduction -Nutrition and feeding -Animal behaviour and welfare -General animal husbandry and systems of production, including economic and technical aspects -Hygiene and quality of animal products In addition to original articles, covering basic as well as applied subjects, the journal features review articles and short communications. Acta Agriculturæ Scandinavica, Section A – Animal Science forms part of a trilogy of titles published on behalf of the Nordic Association of Agricultural Scientists (NJF). The series also includes Section B - Soil & Plant Science and the recently launched Section C - Food Economics . Acta Agriculturae Scandinavica A, B and C are available to purchase as a combined subscription. This provides access to all three journals in the series, and is available to institutional subscribers only. For full pricing information, please view the Taylor & Francis Journals Price List here. Scientists in research, teaching and extension with specialised interest in animal science and production.