中安纳托利亚美利奴羊母羊一生生产力特征的遗传参数

IF 1.6 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Mehmet Kizilaslan , Yunus Arzik , Sedat Behrem
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引用次数: 0

摘要

快速增长的人口数量、近期因大流行病造成的生产和供应链断裂,以及气候变化带来的进一步影响,都凸显了动物生产力的重要性。与母羊生产力相关的性状对养羊场的整体生产力、盈利能力和效率有着直接影响。因此,本研究旨在估算与中安纳托利亚美利奴母羊终生生产力相关的性状的方差成分、遗传率以及遗传和表型相关性。研究利用每只母羊的羔羊出生和断奶记录以及性别和出生类型等环境因素来推导母羊的终生生产力特征。遗传参数估计涉及 3101 只中安纳托利亚美利奴母羊的观测数据,包括每只母羊的平均羔羊出生重和羔羊总重(MBW 和 TBW)、每只母羊的平均羔羊断奶重和羔羊总重(MWW 和 TWW)以及平均羔羊断奶数和羔羊总断奶数(MNLW 和 TNLW)。该分析使用了由 13229 只动物组成的血统。基于平均信息限制最大似然法(AIREML)的动物线性混合模型对(共)方差成分的分解进行了估算,该模型基于从血统中得出的分子关系矩阵,并将羔羊的辈分作为一个固定因素。该品种终生生产力性状的遗传率估计值介于 0.29 和 0.42 之间,处于中低水平。在相关性状之间观察到广泛的遗传和表型相关性(介于-0.56和0.99之间)。通过揭示将母羊终生繁殖性能和生产力纳入选育指数的基本参数,该研究成果有望显著改善全球绵羊生产系统。这也将使占土耳其绵羊生产者很大比例的中安纳托利亚美利奴羊养殖户受益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Genetic parameters for ewe lifetime productivity traits in Central Anatolian Merino sheep

Rapidly increasing population size, recent breaks in production and supply chains, due to pandemics, and those further expected because of climate change emphasize the compelling importance of animal productivity. Traits associated with the productivity of ewes have a direct impact on the overall productivity, profitability and efficiency of sheep farms. Therefore, the objective of the current study was to estimate the variance components, heritabilities as well as genetic and phenotypic correlations, for traits associated with the lifetime productivity of Central Anatolian Merino ewes. Birth and weaning records of lambs for each ewe as well as environmental factors such as sex and birth type were utilized for deriving ewe lifetime productivity traits. Genetic parameter estimations involved observations from 3101 Central Anatolian Merino ewes, encompassing mean and total lamb birth weight per ewe (MBW and TBW), mean and total lamb weaning weight per ewe (MWW and TWW), and the mean and total number of lambs weaned (MNLW and TNLW). This analysis utilized a pedigree comprising 13229 animals. Average Information Restricted Maximum Likelihood (AIREML) based Animal Linear Mixed Model estimations for the decomposition of (co)variance components were implemented based on pedigree-derived numerator relationship matrix by also accounting for the number of parities as a fixed factor. Low to moderate heritability estimates, ranging between 0.29 and 0.42, were observed for the lifetime productivity traits of the breed. A wide range of genetic and phenotypic correlations (between −0.56 and 0.99) was observed among the traits of interest. The outcomes of the study are anticipated to significantly enhance the global sheep production systems by uncovering the essential parameters for incorporating ewe’s lifetime reproductive performance and productivity into the selection indices. This will also benefit Central Anatolian Merino farmers, who form a large proportion of sheep producers in Turkey.

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来源期刊
Small Ruminant Research
Small Ruminant Research 农林科学-奶制品与动物科学
CiteScore
3.10
自引率
11.10%
发文量
210
审稿时长
12.5 weeks
期刊介绍: Small Ruminant Research publishes original, basic and applied research articles, technical notes, and review articles on research relating to goats, sheep, deer, the New World camelids llama, alpaca, vicuna and guanaco, and the Old World camels. Topics covered include nutrition, physiology, anatomy, genetics, microbiology, ethology, product technology, socio-economics, management, sustainability and environment, veterinary medicine and husbandry engineering.
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