Recent strategies to mitigate reproductive aging in male broiler breeders: A review

IF 2.2 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
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Abstract

The continued improvement of genetics, nutrition, and management has resulted in rapid growth, better feed efficiency, and higher meat yield with competitive prices in the broiler industry. Nowadays, however, it is well-documented that productive traits and fertility are negatively correlated, and male broiler breeders are exposed to a fertility decline after 45 wk of age. Considering a low male-to-female ratio in breeder flocks, roosters have a prominent impact on flock fertility. Consequently, strategies to maintain the fertility of male broiler breeders could guarantee the reproductive performance of commercial herds. Understanding reproductive aging demands deep insights into its molecular and physiological mechanisms. Over-weighting, Sertoli and Leydig cell dysfunctions, compromised antioxidant capacity, imbalance in sexual hormones, and epididymal lithiasis are among candidate culprits associated with reproductive aging in roosters. Nutritional and managing strategies have been successfully applied to modulate body weight, improve sperm fatty acid profile and antioxidant status, and boost spermatogenic and steroidogenic pathways. The current review characterizes the physiology and biochemistry of reproductive aging in male broiler breeders and then highlights strategies and their underlying mechanisms to mitigate this failure. In summary, applying one or more of the abovementioned strategies might result in consistent post-peak reproduction and benefit producers in the poultry industry.

缓解雄性肉种鸡生殖衰老的最新策略:综述。
随着遗传学、营养学和管理学的不断改进,肉鸡的生长速度越来越快,饲料效率越来越高,出肉率越来越高,价格也越来越有竞争力。然而,如今有充分的证据表明,生产性能与繁殖力呈负相关,雄性肉种鸡在 45 周龄后繁殖力会下降。考虑到种鸡群的雌雄比例较低,公鸡对鸡群的繁殖力有着显著的影响。因此,维持雄性肉种鸡繁殖力的策略可保证商品鸡群的繁殖性能。要了解生殖衰老,就必须深入了解其分子和生理机制。体重过重、Sertoli 和 Leydig 细胞功能障碍、抗氧化能力下降、性激素失衡和附睾石症等都是导致公鸡生殖衰老的罪魁祸首。营养和管理策略已被成功应用于调节体重、改善精子脂肪酸谱和抗氧化状态,以及促进生精和类固醇生成途径。本综述描述了雄性肉种鸡生殖衰老的生理学和生物化学特征,然后重点介绍了缓解这种衰老的策略及其内在机制。总之,采用上述一种或多种策略可能会使后高峰期的繁殖力保持稳定,并使家禽业的生产者受益。
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来源期刊
Animal Reproduction Science
Animal Reproduction Science 农林科学-奶制品与动物科学
CiteScore
4.50
自引率
9.10%
发文量
136
审稿时长
54 days
期刊介绍: Animal Reproduction Science publishes results from studies relating to reproduction and fertility in animals. This includes both fundamental research and applied studies, including management practices that increase our understanding of the biology and manipulation of reproduction. Manuscripts should go into depth in the mechanisms involved in the research reported, rather than a give a mere description of findings. The focus is on animals that are useful to humans including food- and fibre-producing; companion/recreational; captive; and endangered species including zoo animals, but excluding laboratory animals unless the results of the study provide new information that impacts the basic understanding of the biology or manipulation of reproduction. The journal''s scope includes the study of reproductive physiology and endocrinology, reproductive cycles, natural and artificial control of reproduction, preservation and use of gametes and embryos, pregnancy and parturition, infertility and sterility, diagnostic and therapeutic techniques. The Editorial Board of Animal Reproduction Science has decided not to publish papers in which there is an exclusive examination of the in vitro development of oocytes and embryos; however, there will be consideration of papers that include in vitro studies where the source of the oocytes and/or development of the embryos beyond the blastocyst stage is part of the experimental design.
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