Genetic markers associated with beef quality: A review

IF 1.8 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE Livestock Science Pub Date : 2024-11-01 DOI:10.1016/j.livsci.2024.105583
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Abstract

Classic animal breeding focuses on changes in genetic composition of populations through selection and breeding systems designed to increase the frequency of favorable alleles incrementing production by improving traits of commercial interest. Meat quality involves traits that have received considerable attention in genetic breeding programs in recent years. The genomic selection using single nucleotides polymorphisms (SNPs) markers is a strong tool to obtain desired phenotypes for economically important traits, including those which are perceived by consumers. Trait such as back and intramuscular fat contribute to the juiciness, flavor and tenderness of beef, all of which directly influences consumer choice. Over the years, many studies have been conducted resulting in multiple quantitative trait locus (QTLs) candidates for carcass and meat quality traits, and an extensive database has been created. Traits such as marbling score, intramuscular fat and subcutaneous fat thickness (which includes back fat and rump fat thickness), have been associated with 2448, 192 and 1044 QTLs, respectively. Although genetic analyses are costly and laborious, the use of molecular markers help to increase favorable genes in the population. Their advance is becoming more concrete and acceptable as a measure of economic importance.
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与牛肉质量相关的遗传标记:综述
传统的动物育种侧重于通过选择和育种系统改变种群的遗传组成,旨在通过改善具有商业利益的性状来增加有利等位基因的频率,从而提高产量。肉质所涉及的性状近年来在遗传育种计划中受到了极大关注。利用单核苷酸多态性(SNPs)标记进行基因组选择是获得具有重要经济意义的性状(包括消费者感知的性状)的理想表型的有力工具。背脂和肌内脂肪等性状有助于提高牛肉的多汁性、风味和嫩度,所有这些都会直接影响消费者的选择。多年来,人们进行了大量研究,为胴体和肉质性状找到了多个数量性状基因座(QTLs)候选基因,并建立了一个庞大的数据库。大理石纹评分、肌肉内脂肪和皮下脂肪厚度(包括背脂和臀脂厚度)等性状分别与 2448、192 和 1044 个 QTL 相关。虽然遗传分析成本高、工作量大,但分子标记的使用有助于增加群体中的有利基因。作为衡量经济重要性的一种方法,分子标记的进步正变得越来越具体和可接受。
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来源期刊
Livestock Science
Livestock Science 农林科学-奶制品与动物科学
CiteScore
4.30
自引率
5.60%
发文量
237
审稿时长
3 months
期刊介绍: Livestock Science promotes the sound development of the livestock sector by publishing original, peer-reviewed research and review articles covering all aspects of this broad field. The journal welcomes submissions on the avant-garde areas of animal genetics, breeding, growth, reproduction, nutrition, physiology, and behaviour in addition to genetic resources, welfare, ethics, health, management and production systems. The high-quality content of this journal reflects the truly international nature of this broad area of research.
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