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首页> 外文期刊>Domestic Animal Endocrinology >Overcoming neuroendocrine and metabolic barriers to puberty: the role of melatonin in advancing puberty in ewe lambs
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Overcoming neuroendocrine and metabolic barriers to puberty: the role of melatonin in advancing puberty in ewe lambs

机译：克服青春期的神经内分泌和代谢障碍：褪黑素在埃韦斯羊丸中推进青春期的作用

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摘要

Pubertal onset in the ewe is subject to a multitude of physiological and environmental constraints. As seasonal breeders, sheep rely on decreasing photoperiod to enter puberty and the subsequent breeding periods, hindering production. The initiation of puberty defines the reproductive yield of the ewe, and as such is a critical factor influencing production outcomes. Currently, the misconception that ovine puberty is reliant on age results in ewes being bred at over a year old, leading to a substantial unproductive period between birth and first conception. As such, transcending pubertal barriers to allow for earlier initiation of reproductive competency has significant commercial merit. The primary candidate to achieve this is the neurohormone melatonin, a key factor that naturally signals photoperiodic change that facilitates seasonal remodeling of the ovine hypothalamic-hypophyseal-gonadal axis. Despite being known to modulate reproductive seasonality in both the mature ewe and ram, the ability of melatonin to advance ewe puberty remains underutilized in industry. To optimize melatonin application and shape perceptions of breeding ewe lambs, a greater understanding of pubertal impediments and the natural role of melatonin is warranted. This review examines the physiological role and applications of melatonin to advance ewe puberty, and how this may act in conjunction with other physiological and metabolic cues. (C) 2020 Elsevier Inc. All rights reserved.
机译：eWE的青春期发作受到众多生理和环境限制的影响。作为季节性育种者，绵羊依赖于递减光周期进入青春期和随后的育种期，妨碍生产。青春期的启动定义了母羊的繁殖产量，因此是影响生产结果的关键因素。目前，绵羊青春期依赖年龄的误解导致母羊在一岁月繁殖的母羊，导致出生与首次概念之间的实质性不良期。因此，超越青春期障碍以允许早期开始的生殖能力具有重要的商业优点。实现这一目标的主要候选者是神经中莫氨酸褪黑激素，其自然表示光周期变化的关键因素，其促进绵羊下丘脑 - 衰弱 - 衰弱性轴颈轴的季节性重塑。尽管被众所周知，在成熟的eWE和RAM中调节繁殖季节性，但褪黑素推动eweperty的能力将在工业中未充分利用。为了优化褪黑素的应用和对育种羊羔羊羔的形状看法，有必要更加了解青春期障碍和褪黑素的自然作用。该综述检测褪黑素推导eWE青春期的生理作用和应用，以及如何与其他生理和代谢线索结合起来。 （c）2020 Elsevier Inc.保留所有权利。

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