金华、杜洛克及其杂交猪胴体和肉质性状的遗传参数。

IF 1.9 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE Journal of Animal Breeding and Genetics Pub Date : 2023-09-05 DOI:10.1111/jbg.12823
Kei Terada, Toshiyuki Ohtani, Shinichiro Ogawa, Hiroyuki Hirooka
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引用次数: 0

摘要

金华猪具有优良的肉质和肌内脂肪含量。将金华猪与高产的杜洛克猪杂交,培育出兼有两种猪有益性状的复合品种。本研究的目的是通过分析金华、杜洛克及其杂交猪的表型数据,利用Kinghorn模型估计杂交参数(加性、显性和上位性损失效应)和遗传参数(遗传力和遗传相关性)对胴体和肉质性状的影响。测量第9 ~ 13节胸椎上方最薄点背膘厚度(BF)、第4 ~ 5节胸椎之间最长肌面积(LMA)、肉剪切力值(SFV)和IMF。各性状的加性品种效应均显著:BF、LMA、SFV和IMF分别为1.59 cm、-8.30 cm2、-6.38 lb/cm2和1.76%。优势效应对LMA (7.41 cm2)和IMF(-2.46%)显著,上位性损失效应仅对LMA (-15.18 cm2)显著。估计遗传力值很高,从IMF的0.58到LMA的0.76不等。BF与IMF呈负相关(-0.11);然而,先前的研究已经报道,这些性状之间的遗传相关性在现代西方猪中是适度正相关的。结果表明,通过对杂交育种和遗传参数的估计,可以通过金华猪和杜洛克猪的杂交进行遗传改良,生产出肉质和生产能力良好的新组合品种,以满足日本市场的需求。
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Genetic parameters for carcass and meat quality traits in Jinhua, Duroc, and their crossbred pigs

Jinhua pigs have excellent meat quality and intramuscular fat content (IMF). Crossbreeding of Jinhua with Duroc pigs with high productivity was conducted to develop a new composite breed that possesses the beneficial characteristics of both breeds. The objective of this study was to estimate the crossbreeding parameters (additive breed, dominance, and epistatic loss effects) using the Kinghorn model and genetic parameters (heritability and genetic correlation) for carcass and meat quality traits by analysing the phenotypic data of Jinhua, Duroc, and their crossbred pigs. Backfat thickness at the thinnest point above the 9th to 13th thoracic vertebrae (BF), longissimus muscle area between the 4th and 5th thoracic vertebrae (LMA), meat shear force value (SFV), and IMF were measured. The additive breed effects were significant for all traits: 1.59 cm, −8.30 cm2, −6.38 lb/cm2, and 1.76% for BF, LMA, SFV, and IMF, respectively. The dominance effect was significant for LMA (7.41 cm2) and IMF (−2.46%), whereas the epistatic loss effect was significant for only LMA (−15.18 cm2). The estimated heritability values were high, ranging from 0.58 for IMF to 0.76 for LMA. A negative but non-significant genetic correlation of −0.11 was estimated between BF and IMF; however, previous studies have reported that the genetic correlation between these traits is moderately positive in modern western pigs. Our results imply that, with the estimation of crossbreeding and genetic parameters, genetic improvement could be implemented to produce a new composite breed with good meat quality and productivity, to meet Japanese market requirements, by crossbreeding Jinhua and Duroc pigs.

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来源期刊
Journal of Animal Breeding and Genetics
Journal of Animal Breeding and Genetics 农林科学-奶制品与动物科学
CiteScore
5.20
自引率
3.80%
发文量
58
审稿时长
12-24 weeks
期刊介绍: The Journal of Animal Breeding and Genetics publishes original articles by international scientists on genomic selection, and any other topic related to breeding programmes, selection, quantitative genetic, genomics, diversity and evolution of domestic animals. Researchers, teachers, and the animal breeding industry will find the reports of interest. Book reviews appear in many issues.
期刊最新文献
Issue Information Influence of variance component estimates on genomic predictions for growth and reproductive-related traits in Nellore cattle. Genomic selection strategies for the German Merino sheep breeding programme - A simulation study. Correction to: Rahbar et al., 2023. Defining desired genetic gains for Pacific white shrimp (Litopeneaus vannamei) breeding objectives using participatory approaches. Journal of Animal Breeding and Genetics. 2024;141:390-402. Combining genomics and semen microbiome increases the accuracy of predicting bull prolificacy.
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