Genetic parameters estimation of fatty acid and related traits in the longissimus Thoracis of Hu sheep

IF 6.4 1区农林科学 Q1 Agricultural and Biological Sciences

Meat Science Pub Date : 2026-03-01 Epub Date: 2025-12-07 DOI:10.1016/j.meatsci.2025.110010

Yuanyuan Kong , Xueying Zhang , Tajmal Hussain Solangi , Zhongyu Wang , Chongyang Liu , Wenqiao Li , Xing Liu , Joram Mwashigadi Mwacharo , Fadi Li , Xiangpeng Yue

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引用次数: 0

Abstract

The influence of fatty acids (FAs) on meat quality and health is widely recognized. However, estimates of genetic parameters for FAs in sheep muscle remain scarce. Here, data from 1230 Hu sheep with integrated pedigree information were used to estimate heritability, genetic correlations, and selection response for FA traits in Longissimus thoracis (LT). A total of 44 individual FAs and 33 FA classes were identified. Among the FAs, 12 (C18:2n6t to C18:3n6), 25 (C18:0iso to C16:0), and 7 (C14:0 to C6:0) had low (0.04–0.15), moderate (0.16–0.29), and high (0.35–0.70) heritability, respectively. Indices of FA metabolism also showed high heritability (0.28–0.44). Estimates of heritability for saturated (SFA), monounsaturated (MUFA), and polyunsaturated (PUFA) fatty acids decreased with increase in FA unsaturation. Positive genetic and Spearman correlations were observed among most FAs, particularly among C10 ∼ C18 FAs. The unsaturation index (UI), health-promoting index (HPI), and hypocholesterolemic/hypercholesterolemic ratio (h/H) had strong and negative genetic correlation with SFA, MUFA, unsaturated fatty acids (UFA), and intramuscular fat (IMF). Selecting for improved HPI, UI, and h/H, resulted in a favorable response in several traits including UFA/SFA, PUFA/SFA, MUFA/SFA, thrombogenic index (TI), atherogenic index (AI), SFA, C12:0, C16:0, and C18:0. These findings can be used to formulate breeding strategies to improve the FA profiles of LT in Hu sheep.

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湖羊胸最长肌脂肪酸及相关性状的遗传参数估计。

脂肪酸（FAs）对肉类品质和健康的影响已被广泛认识。然而，绵羊肌肉中FAs的遗传参数估计仍然很少。本研究利用1230只湖羊的综合家系信息，估计了胸最长肌FA性状的遗传力、遗传相关性和选择响应。共鉴定出44个单独的FA和33个FA类别。其中，12个（c18:2n6 ~ C18:3n6）、25个（C18:0iso ~ C16:0）和7个（C14:0 ~ C6:0）的遗传力分别为低（0.04 ~ 0.15）、中（0.16 ~ 0.29）和高（0.35 ~ 0.70）。FA代谢指标也表现出较高的遗传力（0.28 ~ 0.44）。饱和脂肪酸（SFA）、单不饱和脂肪酸（MUFA）和多不饱和脂肪酸（PUFA）的遗传力估计值随着不饱和脂肪酸的增加而降低。在大多数FAs中观察到正的遗传和Spearman相关性，特别是在C10 ~ C18 FAs中。不饱和指数（UI）、健康促进指数（HPI）、低胆固醇血症/高胆固醇血症比（h/ h）与SFA、MUFA、不饱和脂肪酸（UFA）、肌内脂肪（IMF）具有较强的负相关遗传关系。选择改善的HPI、UI和h/ h，在包括UFA/SFA、PUFA/SFA、MUFA/SFA、血栓形成指数（TI）、动脉粥样硬化指数（AI）、SFA、C12:0、C16:0和C18:0在内的几个特征上产生了良好的反应。本研究结果可用于制定改善湖羊LT FA谱的育种策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Meat Science 工程技术-食品科技

CiteScore

12.60

自引率

9.90%

发文量

282

审稿时长

60 days

期刊介绍： The aim of Meat Science is to serve as a suitable platform for the dissemination of interdisciplinary and international knowledge on all factors influencing the properties of meat. While the journal primarily focuses on the flesh of mammals, contributions related to poultry will be considered if they enhance the overall understanding of the relationship between muscle nature and meat quality post mortem. Additionally, papers on large birds (e.g., emus, ostriches) as well as wild-captured mammals and crocodiles will be welcomed.