Carrie S Wilson, J Bret Taylor, David R Notter, Thomas W Murphy, Whitney C Stewart, Ronald M Lewis
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This difference, and small (nonsignificant) differences favoring industry sires for maternal weaning weight, yearling fiber diameter, and yearling staple length EBV also resulted in greater (<i>P</i> < 0.05) Western Range Index scores for industry sires. The performance of sires' direct progeny born 2016 to 2018 was compared for 17 traits. After data cleaning, there were 664 progeny (417 from industry sires and 247 from USSES sires) with 146 to 664 records per trait. Least squares means differed (<i>P</i> < 0.05) for grease fleece weight, side fiber diameter, and britch fiber diameter in favor of the industry sires. Production traits were measured from the progeny and other retained descendants of both sire genetic groups from 2016 through 2022. After data cleaning, there was a range of 1,138 to 1,493 records per trait. A three-generation pedigree was constructed and the proportional assignment of each lamb to each genetic group (e.g., 0.5 industry, 0.5 USSES) was included in an augmented relationship matrix. A univariate animal model was fitted for each lamb trait and a repeated measures model for each of the three ewe traits was fitted to estimate variance components and predict breeding values. Genetic group solutions did not differ (<i>P</i> > 0.05) for any of these traits but provided a means by which to compare the two groups. Establishment of a Targhee genetic reference flock at USSES has been initiated, which can be used to address issues of importance to the industry.</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"8 ","pages":"txae176"},"PeriodicalIF":1.3000,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11694661/pdf/","citationCount":"0","resultStr":"{\"title\":\"Benchmarking performance in Targhee sheep in development of a genetic reference flock.\",\"authors\":\"Carrie S Wilson, J Bret Taylor, David R Notter, Thomas W Murphy, Whitney C Stewart, Ronald M Lewis\",\"doi\":\"10.1093/tas/txae176\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The Targhee breed is important to range sheep production in the Western United States. 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Least squares means differed (<i>P</i> < 0.05) for grease fleece weight, side fiber diameter, and britch fiber diameter in favor of the industry sires. Production traits were measured from the progeny and other retained descendants of both sire genetic groups from 2016 through 2022. After data cleaning, there was a range of 1,138 to 1,493 records per trait. A three-generation pedigree was constructed and the proportional assignment of each lamb to each genetic group (e.g., 0.5 industry, 0.5 USSES) was included in an augmented relationship matrix. A univariate animal model was fitted for each lamb trait and a repeated measures model for each of the three ewe traits was fitted to estimate variance components and predict breeding values. Genetic group solutions did not differ (<i>P</i> > 0.05) for any of these traits but provided a means by which to compare the two groups. 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引用次数: 0
摘要
塔吉羊是美国西部重要的牧羊品种。本研究的目的是通过国家绵羊改良计划(NSIP)将参与国家遗传评估的产业界品种整合到该品种的起源地美国绵羊实验站(USSES)羊群中,以基准父系表现。2023年NSIP塔吉遗传评价中工业品系(n = 16)和USSES品系(n = 12)的估计育种值(EBV)仅在NSIP Number Born EBV上存在差异(P < 0.05)。这一差异以及产种在断奶重、1龄纤维直径和1龄短绒长度EBV上的小(不显著)差异也导致产种的西部范围指数得分更高(P < 0.05)。比较了2016年至2018年出生的母羊直系后代的17个性状。数据清洗后,有664个后代(417个来自工业系,247个来自美国系),每个性状有146 ~ 664条记录。这些性状的最小二乘均值差异(P < 0.05),但提供了一种比较两组的方法。在USSES建立了一个target hee遗传参考群,可以用来解决对行业重要的问题。
Benchmarking performance in Targhee sheep in development of a genetic reference flock.
The Targhee breed is important to range sheep production in the Western United States. The objective of this research was to integrate industry sires participating in national genetic evaluation through the National Sheep Improvement Program (NSIP) into the U.S. Sheep Experiment Station (USSES) flock, where the breed originated, to benchmark sire performance. Estimated breeding values (EBV) of industry sires (n = 16) and USSES sires (n = 12) from the 2023 NSIP Targhee genetic evaluation differed (P < 0.05) only for the NSIP Number Born EBV. This difference, and small (nonsignificant) differences favoring industry sires for maternal weaning weight, yearling fiber diameter, and yearling staple length EBV also resulted in greater (P < 0.05) Western Range Index scores for industry sires. The performance of sires' direct progeny born 2016 to 2018 was compared for 17 traits. After data cleaning, there were 664 progeny (417 from industry sires and 247 from USSES sires) with 146 to 664 records per trait. Least squares means differed (P < 0.05) for grease fleece weight, side fiber diameter, and britch fiber diameter in favor of the industry sires. Production traits were measured from the progeny and other retained descendants of both sire genetic groups from 2016 through 2022. After data cleaning, there was a range of 1,138 to 1,493 records per trait. A three-generation pedigree was constructed and the proportional assignment of each lamb to each genetic group (e.g., 0.5 industry, 0.5 USSES) was included in an augmented relationship matrix. A univariate animal model was fitted for each lamb trait and a repeated measures model for each of the three ewe traits was fitted to estimate variance components and predict breeding values. Genetic group solutions did not differ (P > 0.05) for any of these traits but provided a means by which to compare the two groups. Establishment of a Targhee genetic reference flock at USSES has been initiated, which can be used to address issues of importance to the industry.
期刊介绍:
Translational Animal Science (TAS) is the first open access-open review animal science journal, encompassing a broad scope of research topics in animal science. TAS focuses on translating basic science to innovation, and validation of these innovations by various segments of the allied animal industry. Readers of TAS will typically represent education, industry, and government, including research, teaching, administration, extension, management, quality assurance, product development, and technical services. Those interested in TAS typically include animal breeders, economists, embryologists, engineers, food scientists, geneticists, microbiologists, nutritionists, veterinarians, physiologists, processors, public health professionals, and others with an interest in animal production and applied aspects of animal sciences.