<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.2d1 20170631//EN" "JATS-journalpublishing1.dtd"> <ArticleSet> <Article> <Journal> <PublisherName>emergentresearch</PublisherName> <JournalTitle>Emergent Life Sciences Research</JournalTitle> <PISSN>2395-6658 (</PISSN> <EISSN>) 2395-664X (Print)</EISSN> <Volume-Issue/> <PartNumber/> <IssueTopic>Multidisciplinary</IssueTopic> <IssueLanguage>English</IssueLanguage> <Season/> <SpecialIssue>N</SpecialIssue> <SupplementaryIssue>N</SupplementaryIssue> <IssueOA>Y</IssueOA> <PubDate> <Year>-0001</Year> <Month>11</Month> <Day>30</Day> </PubDate> <ArticleType>Research Article</ArticleType> <ArticleTitle>Evaluation of the repeatability of male calves' birth weights in different grades of Jersey x Red Sindhi crosses</ArticleTitle> <SubTitle/> <ArticleLanguage>English</ArticleLanguage> <ArticleOA>Y</ArticleOA> <FirstPage>0</FirstPage> <LastPage>0</LastPage> <AuthorList> <Author> <FirstName>Pramod</FirstName> <LastName>Prabhakar</LastName> <AuthorLanguage>English</AuthorLanguage> <Affiliation/> <CorrespondingAuthor>N</CorrespondingAuthor> <ORCID/> </Author> </AuthorList> <DOI/> <Abstract>The purpose of this research was to assess the consistency of birth weight among male calves born to half-Jersey x half-Red Sindhi, quarter-Jersey x ¾ Red Sindhi, three-eighths Jersey x five-eighths Red Sindhi and one -eight Jersey x seven -eight Red Sindhi cows. The SHUATS in Prayagraj, Uttar Pradesh, India obtained the data from a pedigree cum history sheet. Male calves born to 77 cows during the first (L1), second (L2), and third (L3) lactations, as well as 127 observations of Jersey x Red Sindhi cows of varying quality, were all measured and recorded in kilos. Increased reproducibility across many cross-breed dairy cow performance tiers indicates superiority. This research shows that choosing cows with higher estimations based on the birth weight of their male calves can increase the output of herds. The mean of birth weight of male calves L1, L2 and L3 were 18.11, 20.15, 22.07 kg of ½ Jersey × ½ Red Sindhi crosses, 20.50, 19.88, 20.77Kg of ¼ Jersey × ¾ Red Sindhi crosses, 20.06, 20.88, 22.24 kg of 3/8 Jersey × 5/8 Red Sindhi crosses, 19.08, 18.76, 22.83 kg of 1/8 Jersey ×7/8 Red Sindhi crosses respectively. The ranges of birth weight of male calves from the first (L1), second (L2) and third (L3) lactations were 15.80 - 20.10, 15.80 - 26.6, 19.6 - 25.8 kg of ½ Jersey × ½ Red Sindhi crosses, 15.42 - 24.94, 14.51 - 25.70, 13.6 - 28.12 Kg of ¼ Jersey × ¾ Red Sindhi crosses, 14.96 - 26.40, 16.32 - 24.30, 15.42 - 27.50 kg of 3/8 Jersey × 5/8 Red Sindhi crosses, 15.87 - 24.23, 12.70 - 24.51, 18.14 - 25.80 kg of 1/8 Jersey ×7/8 Red Sindhi crosses respectively. The overall mean of birth weight of male calves was 20.13 kg of ½ Jersey × ½ Red Sindhi crosses, 17.68 Kg of ¼ Jersey × ¾ Red Sindhi crosses, 21.07 kg of 3/8 Jersey × 5/8 Red Sindhi crosses, 19.92 kg of 1/8 Jersey ×7/8 Red Sindhi crosses respectively. The highest birth weight of male calve were 25.8 Kg and lowest 15.80 Kg of ½ Jersey × ½ Red Sindhi crosses, 28.12 Kg highest and lowest 13.60 kg of ¼ Jersey × ¾ Red Sindhi crosses, 27.50 kg highest and lowest 14.96 kg of 3/8 Jersey × 5/8 Red Sindhi crosses, 25.8 kg highest and lowest 12.70 kg of 1/8 Jersey ×7/8 Red Sindhi, respectively. The repeatability of birth weight of male calves for 0.60 ± 0.20 of ½ Jersey × ½ Red Sindhi crosses, 0.46 ± 0.19 of ¼ Jersey × ¾ Red Sindhi crosses, 0.78 ± 0.15 of 3/8 Jersey × 5/8 Red Sindhi crosses, 0.57 ± 0.15 of 1/8 Jersey ×7/8 Red Sindhi crosses. The more repeatability for various grades of crossbred dairy cattle shows better performance. The present study revealed that birth weight of male calves of cows could be useful in selecting those have the higher estimates in order to improve the productivity of the herds.</Abstract> <AbstractLanguage>English</AbstractLanguage> <Keywords>Birth weight, Crossbred, Cows, Repeatability, and Selection</Keywords> <URLs> <Abstract>https://www.emergentresearch.org/ubijournal-v1copy/journals/abstract.php?article_id=14899&title=Evaluation of the repeatability of male calves' birth weights in different grades of Jersey x Red Sindhi crosses</Abstract> </URLs> <References> <ReferencesarticleTitle>References</ReferencesarticleTitle> <ReferencesfirstPage>16</ReferencesfirstPage> <ReferenceslastPage>19</ReferenceslastPage> <References/> </References> </Journal> </Article> </ArticleSet>