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首页> 外文期刊>Journal of dairy science >Genetic parameters of endocrine fertility traits based on in-line milk progesterone profiles in Swedish Red and Holstein dairy cows
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Genetic parameters of endocrine fertility traits based on in-line milk progesterone profiles in Swedish Red and Holstein dairy cows

机译：基于瑞典红色和荷斯坦奶牛奶牛的内分泌性生育性状的内分泌生育性状的遗传参数

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摘要

Evaluating fertility traits based on endocrine progesteroneprofiles is becoming a promising option toimprove dairy cow fertility. Several studies have beenconducted on endocrine fertility traits, mainly in theHolstein breed. In this study, focusing also on theSwedish Red (SR) breed, genetic parameters wereestimated for classical and endocrine fertility traits,the latter based on in-line milk progesterone recordsobtained for 14 Swedish herds using DeLaval HerdNavigator (DeLaval International, Tumba, Sweden). Atotal of 210,403 observations from 3,437 lactations of1,107 SR and 1,538 Holstein cows were used. Mixedlinear animal models were used for estimation of geneticparameters. Least squares means analysis showedthat Holstein cows had a 2.5-d-shorter interval fromcalving to commencement of luteal activity (C-LA)and longer length of first inter-ovulatory interval (IOI)than SR cows. The highest mean interval for C-LA,IOI, and first luteal phase length (LPL) was observedin the fourth parity. The incidence of short (＜18 d),normal, (18-24 d), and long (＞24 d) IOI was 29.3,40.7, and 30%, respectively. Genetic analysis indicatedmoderate heritability (h~2) for C-LA (h~2 = 0.24), lutealactivity during the first 60 d in milk (LA60, h~2 = 0.15),proportion of samples with luteal activity (PLA, h~2 =0.13), and calving to first heat (CFH, h~2 = 0.18), andlow heritability estimates for LPL (h~2 = 0.08) and IOI(h~2 = 0.03) in the combined data set for both breeds.Similar heritability estimates were obtained for eachbreed separately except for IOI and LPL in SR cows,for which heritability was estimated to be zero. SwedishRed cows had 0.01 to 0.06 higher heritability estimatesfor C-LA, LA60, and PLA than did Holstein cows.Calving interval had moderate heritability among theclassical traits for Holstein and the combined data set,but h~2 was zero for SR. Commencement of luteal activityhad a strong genetic correlation with LA60 (mean± SE; −0.88 ± 0.06), PLA (−0.72 ± 0.11), and CFH(0.90 ± 0.04). Similarly, CFH had a strong geneticcorrelation with IOI (0.98 ± 0.20). Number of inseminationsper series showed a weak genetic correlationwith all endocrine traits except IOI. Overall, endocrinetraits had higher heritability estimates than classicaltraits in both breeds, and may have a better potentialto explain the actual reproductive status of dairycows than classical traits. This might favor inclusionof some endocrine fertility traits—especially those relatedto commencement of luteal activity—as selectioncriteria and breeding goal traits if recording becomesmore common in herds. Further studies on genetic andgenomic evaluations for endocrine fertility traits mayhelp to provide firm conclusions. A prerequisite is thatthe data from automatic devices be made available torecording and breeding organizations in the future andincluded in a central database.
机译：基于内分泌孕酮的评估生育性状配置文件正在成为一个有前途的选择改善乳制品牛生育。几项研究已经存在在内分泌生育性状上进行，主要是在荷斯坦品种。在这项研究中，对焦于瑞典红（SR）品种，遗传参数是估计古典和内分泌生育性特征，后者基于在线牛奶孕酮记录使用Delaval Herd获得14只瑞典牛群导航员（Delaval International，Tumba，瑞典）。一种共有210,403分或3,437次哺乳期的观察使用1,107 SR和1,538枚荷斯坦奶牛。混合线性动物模型用于估计遗传参数。最小二乘意味着分析显示霍尔斯坦奶牛的间隔较短氯化肺活反应的开始（C-LA）更长的第一间隔间隔长度（IOI）比SR奶牛。 C-LA的最高平均间隔，观察到IOI和第一个肺相长（LPL）在第四个平等。短（<18d）的发生率，正常，（18-24 d），长（> 24 d）ioi是29.3，40.7和30％。遗传分析表明C-LA（H〜2 = 0.24），Luteal的适度遗传性（H〜2）在牛奶中的前60 d期间的活动（La60，H〜2 = 0.15），具有耐力活动的样品比例（PLA，H〜2 =0.13），并加热至第一热（CFH，H〜2 = 0.18），和LPL（H〜2 = 0.08）和IOI的低遗传性估算（H〜2 = 0.03）在适用于两种品种的组合数据中。获得类似的遗传性估计除了SR奶牛中的IOI和LPL，另有单独品种，估计遗传性估计为零。瑞典红奶牛的遗传性估算有0.01至0.06升对于C-LA，LA60和PLA而不是Holstein奶牛。Calping间隔在中间的遗传性Holstein和组合数据集的古典特征，但是SR的H〜2为零。生效活性与LA60有强遗传相关（平均值±se; -0.88±0.06），PLA（-0.72±0.11）和CFH（0.90±0.04）。同样，CFH有一个强大的遗传与IOI的相关性（0.98±0.20）。营养次数每种系列显示出弱遗传相关性除了IOI之外的所有内分泌特征。总体而言，内分泌特质的遗传性估算比古典更高两种品种的特质，可能有更好的潜力解释乳制品的实际生殖状态奶牛比古典特征。这可能有利于包含一些内分泌生育性特征 - 尤其是那些相关的开始患力活动 - 作为选择如果录音变为标准和育种目标特征在牛群中更常见。进一步研究遗传和内分泌生育性特征的基因组评估可能帮助提供坚定的结论。先决条件是自动设备的数据可供选择将来的记录和繁殖组织和包含在中央数据库中。

著录项

  • 来源
    《Journal of dairy science》 |2019年第12期|11207-11216|共10页
  • 作者

    G. M. Tarekegn; P. Gullstrand; E. Strandberg; R. Bage; E. Rius-Vilarrasa; J. M. Christensen; B. Berglund;

  • 作者单位

    Department of Animal Breeding and Genetics Centre for Reproductive Biology in Uppsala Swedish University of Agricultural Sciences PO Box 7023 SE-750 07 Uppsala Sweden Department of Animal Production and Technology Bahir Dar University PO Box 79 Bahir Dar Ethiopia;

    Department of Animal Production and Technology Bahir Dar University PO Box 79 Bahir Dar Ethiopia;

    Department of Animal Production and Technology Bahir Dar University PO Box 79 Bahir Dar Ethiopia;

    Department of Clinical Sciences Centre for Reproductive Biology in Uppsala Swedish University of Agricultural Sciences PO Box 7054 SE-750 07 Uppsala Sweden Vaexa Sverige PO Box 30204 SE-104 25 Stockholm Sweden;

    Vaexa Sverige PO Box 30204 SE-104 25 Stockholm Sweden;

    Lattec Slangerupsgade 69 3400 Hillerod Denmark;

    Department of Animal Production and Technology Bahir Dar University PO Box 79 Bahir Dar Ethiopia;

  • 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

    correlation; heritability; luteal activity; progesterone;

    机译：相关性;遗传性;Luteal活动;黄体酮;

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