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首页> 外文期刊>Journal of dairy science >Genetic parameters of differential somatic cell count, milk composition, and cheese-making traits measured and predicted using spectral data in Holstein cows
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Genetic parameters of differential somatic cell count, milk composition, and cheese-making traits measured and predicted using spectral data in Holstein cows

机译：测量和预测鉴别躯体细胞计数，牛奶组合物和奶酪制作性状的遗传参数，并在荷斯坦奶牛中使用光谱数据预测

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摘要

Mastitis is one of the most prevalent diseases in dairycattle and is the cause of considerable economic losses.Alongside somatic cell count (SCC), differential somaticcell count (DSCC) has been recently introduced as anew indicator of intramammary infection. The DSCCis expressed as a count or a proportion (%) of polymorphonuclearneutrophils plus lymphocytes (PMN-LYM)in milk somatic cells. These numbers are complementedto total somatic cell count or to 100 by macrophages(MAC). The aim of this study was to investigate thegenetic variation and heritability of DSCC, and itscorrelation with milk composition, udder health indicators,milk composition, and technological traits inHolstein cattle. Data used in the analysis consisted insingle test-day records from 2,488 Holstein cows rearedin 36 herds located in northern Italy. Fourier-transforminfrared (FTIR) spectroscopy was used to predict missinginformation for some milk coagulation and cheesemakingtraits, to increase sample size and improveestimation of the genetic parameters. Bayesian animalmodels were implemented via Gibbs sampling. Marginalposterior means of the heritability estimates were0.13 for somatic cell score (SCS); 0.11 for DSCC, MACproportion, and MAC count; and 0.10 for PMN-LYMcount. Posterior means of additive genetic correlationsbetween SCS and milk composition and udder healthwere low to moderate and unfavorable. All the relevantgenetic correlations between the SCC traits consideredand the milk traits (composition, coagulation, cheeseyield and nutrients recovery) were unfavorable. TheSCS showed genetic correlations of −0.30 with the milkprotein proportion, −0.56 with the lactose proportionand −0.52 with the casein index. In the case of milktechnological traits, SCS showed genetic correlationsof 0.38 with curd firming rate (k_(20)), 0.45 with rennetcoagulation time estimated using the curd firmingover time equation (RCT_(eq)), −0.39 with asymptoticpotential curd firmness, −0.26 with maximum curdfirmness (CF_(max)), and of −0.31 with protein recoveryin the curd. Differential somatic cell count expressedas proportion was correlated with SCS (0.60) but hadonly 2 moderate genetic correlations with milk traits:with lactose (−0.32) and CF_(max) (−0.33). The SCS washighly correlated with the log PMN-LYM count (0.79)and with the log MAC count (0.69). The 2 latter traitswere correlated with several milk traits: fat (−0.38 and−0.43 with PMN-LYM and MAC counts, respectively),lactose percentage (−0.40 and −0.46), RCT_(eq) (0.53 and0.41), t_(max) (0.38 and 0.48). Log MAC count was correlatedwith k_(20) (+0.34), and log PMN-LYM count wascorrelated with CF_(max) (−0.26) and weight of water curdas percentage of weight of milk processed (−0.26). Theresults obtained offer new insights into the relationshipsbetween the indicators of udder health and themilk technological traits in Holstein cows.
机译：乳腺炎是乳制品中最普遍的疾病之一牛，是经济损失相当大的原因。沿着体细胞计数（SCC），差动躯体最近被介绍为细胞计数（DSCC）作为一个内际感染的新指标。 DSCC.表示为多核核的计数或比例（％）中性粒细胞加淋巴细胞（PMN-LYM）在牛奶细胞中。这些数字是补充的通过巨噬细胞全体细胞计数或100（苹果电脑）。本研究的目的是调查DSCC的遗传变异与遗传性及其遗传性与牛奶组成，乳房健康指标相关性，牛奶组成和技术特征荷斯坦牛。分析中使用的数据包括在内从2,488韩式奶牛的单一测试日记录饲养在36个牧群位于意大利北部。傅里叶变换红外（FTIR）光谱法用于预测缺失一些牛奶凝固和奶酪酿造的信息特质，增加样品大小并改善估计遗传参数。贝叶斯动物模型通过GIBBS采样实施。边缘遗传性估计的后部手段是0.13用于体细胞分数（SCS）; 0.11对于DSCC，Mac比例和MAC计数; PMN-Lym 0.10数数。添加剂遗传相关性的后手段在SC和牛奶组成和乳房健康之间低于中度和不利。所有相关考虑的SCC特征之间的遗传相关性和牛奶特征（组成，凝血，奶酪产量和营养恢复）是不利的。这SCs显示牛奶的遗传相关-0.30蛋白质比例，-0.56与乳糖比例和-0.52酪蛋白索引。在牛奶的情况下技术特征，SCS显示出遗传相关性0.38的凝乳紧致率（K_（20）），0.45带休闲使用凝乳紧致估计的凝血时间随着时间的等式（RCT_（eq）），-0.39渐近潜在的凝乳固力，-0.26次凝乳坚固性（CF_（最大））和-0.31蛋白质回收率在凝乳中。表达差分体细胞计数随着比例与scs（0.60）相关但有只有2与牛奶特征的中等遗传相关性：用乳糖（-0.32）和CF_（MAX）（-0.33）。 SCS是与原木PMN-LYM计数高度相关（0.79）使用log mac count（0.69）。 2后的性格与几种牛奶特征相关联：脂肪（-0.38和-0.43分别使用PMN-LYM和MAC计数），乳糖百分比（-0.40和-0.46），RCT_（EQ）（0.53和0.41），T_（MAX）（0.38和0.48）。 log MAC计数相关使用K_（20）（+0.34），并且LOG PMN-LYM计数与CF_（MAX）（-0.26）和水凝乳的重量相关联作为加工牛奶重量的百分比（-0.26）。这结果获得了对关系的新见解在乳房健康指标之间荷斯坦奶牛的牛奶技术特质。

著录项

  • 来源
    《Journal of dairy science》 |2021年第10期|10934-10949|共16页
  • 作者

    S. Pegolo; L. F. M. Mota; V. Bisutti; M. Martinez-Castillero; D. Giannuzzi; L. Gallo; S. Schiavon; F. Tagliapietra; A. Revello Chion; E. Trevisi; R. Negrini; P. Ajmone Marsan; A. Cecchinato;

  • 作者单位

    Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE) University of Padova Viale dell’ Universita 16 35020 Legnaro PD Italy;

    Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE) University of Padova Viale dell’ Universita 16 35020 Legnaro PD Italy;

    Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE) University of Padova Viale dell’ Universita 16 35020 Legnaro PD Italy;

    Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE) University of Padova Viale dell’ Universita 16 35020 Legnaro PD Italy;

    Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE) University of Padova Viale dell’ Universita 16 35020 Legnaro PD Italy;

    Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE) University of Padova Viale dell’ Universita 16 35020 Legnaro PD Italy;

    Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE) University of Padova Viale dell’ Universita 16 35020 Legnaro PD Italy;

    Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE) University of Padova Viale dell’ Universita 16 35020 Legnaro PD Italy;

    Associazione Regionale Allevatori del Piemonte Via Torre Roa 13 12100 Cuneo Italy;

    Department of Animal Science Food and Nutrition - DIANA Universita Cattolica del Sacro Cuore 29122 Piacenza Italy Romeo and Enrica Invernizzi Research Center for Sustainable Dairy Production of the Universita Cattolica del Sacro Cuore (CREI) 29122 Piacenza Italy;

    Department of Animal Science Food and Nutrition - DIANA Universita Cattolica del Sacro Cuore 29122 Piacenza Italy Italian Association of Breeders (AIA) 00161 Rome Italy;

    Department of Animal Science Food and Nutrition - DIANA Universita Cattolica del Sacro Cuore 29122 Piacenza Italy Nutrigenomics and Proteomics Research Center - PRONUTRIGEN Universita Cattolica del Sacro Cuore 29122 Piacenza Italy;

    Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE) University of Padova Viale dell’ Universita 16 35020 Legnaro PD Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    udder health; differential somatic cells; Holstein; cheese making;

    机译：乳房健康;差分体细胞;荷斯坦;奶酪制作;

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