{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T21:12:03Z","timestamp":1780434723152,"version":"3.54.1"},"reference-count":26,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2019,11,7]],"date-time":"2019-11-07T00:00:00Z","timestamp":1573084800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100002322","name":"Coordena\u00e7\u00e3o de Aperfei\u00e7oamento de Pessoal de N\u00edvel Superior","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002322","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004901","name":"Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de Minas Gerais","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004901","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Reprod Domestic Animals"],"published-print":{"date-parts":[[2020,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Nellore is the main cattle breed used in Brazil, being the largest commercial herd in the world. Beyond the importance of male reproductive efficiency for farm profit, the use of reproductive techniques, mainly artificial insemination, turns the evaluation of male reproductive traits even more important. Estimation of genetic parameters increases the knowledge on traits variances and allows envisaging the possibility of the inclusion of new traits as selection criterion. Genetic parameters for fifteen traits that can be classified as testicular biometry or physical and morphological semen traits were estimated for a Nellore bull population ranging from 18 to 36\u00a0months. Single\u2010trait and bi\u2010trait animal models were used for (co)variance components estimation. The contemporary group was considered as fixed effect and age at measurement as covariable. Scrotal circumference presented heritability of 0.47\u00a0\u00b1\u00a00.12. This value is similar to the heritabilities found for all testicular biometry traits (0.34\u20130.48). Sperm progressive motility, which has a direct effect on bull fertility, presented low heritability (0.07\u00a0\u00b1\u00a00.08). Major and total sperm defects presented moderate to high heritabilities (0.49\u00a0\u00b1\u00a00.18 and 0.39\u00a0\u00b1\u00a00.15, respectively), indicating that great genetic gain can be obtained through selection against sperm defects. High and positive genetic correlations were observed among testicular biometry traits, which also presented favourable genetic correlations with physical and morphological traits of the semen with magnitude ranging from high to low. Scrotal circumference presented moderate to high and favourable genetic correlations with sperm progressive motility, sperm turbulence, major sperm defects and total sperm defects. Thus, the selection for scrotal circumference results in favourable correlated genetic response for semen quality. The results show that the use of scrotal circumference as reference trait for bull fertility is appropriate, since it presents high heritability and favourable genetic correlation with semen quality.<\/jats:p>","DOI":"10.1111\/rda.13578","type":"journal-article","created":{"date-parts":[[2019,10,24]],"date-time":"2019-10-24T05:39:34Z","timestamp":1571895574000},"page":"38-43","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Genetic parameters for fertility traits in Nellore bulls"],"prefix":"10.1111","volume":"55","author":[{"given":"Ivan","family":"Carvalho Filho","sequence":"first","affiliation":[{"name":"Departamento de Zootecnia Universidade Federal de Vi\u00e7osa Vi\u00e7osa Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniele Botelho Diniz","family":"Marques","sequence":"additional","affiliation":[{"name":"Departamento de Zootecnia Universidade Federal de Vi\u00e7osa Vi\u00e7osa Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carolina Filardi","family":"de Campos","sequence":"additional","affiliation":[{"name":"Departamento de Zootecnia Universidade Federal de Vi\u00e7osa Vi\u00e7osa Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9 Domingos","family":"Guimar\u00e3es","sequence":"additional","affiliation":[{"name":"Departamento de Medicina Veterin\u00e1ria Universidade Federal de Vi\u00e7osa Vi\u00e7osa Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simone Eliza Facioni","family":"Guimar\u00e3es","sequence":"additional","affiliation":[{"name":"Departamento de Zootecnia Universidade Federal de Vi\u00e7osa Vi\u00e7osa Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paulo S\u00e1vio","family":"Lopes","sequence":"additional","affiliation":[{"name":"Departamento de Zootecnia Universidade Federal de Vi\u00e7osa Vi\u00e7osa Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fabyano Fonseca e","family":"Silva","sequence":"additional","affiliation":[{"name":"Departamento de Zootecnia Universidade Federal de Vi\u00e7osa Vi\u00e7osa Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2715-7545","authenticated-orcid":false,"given":"Renata","family":"Veroneze","sequence":"additional","affiliation":[{"name":"Departamento de Zootecnia Universidade Federal de Vi\u00e7osa Vi\u00e7osa Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2019,11,7]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0093-691X(96)00245-2"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1017\/S1751731114000743"},{"key":"e_1_2_10_4_1","volume-title":"Ultrastructure of some characteristic sperm defects and a proposal for a new classification of the bull spermiogram.pdf","author":"Blom E.","year":"1973"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1590\/S1516-35982007000300007"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.2527\/jas.2008-1719"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1439-0531.2011.01748.x"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2016.09.057"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.2527\/jas.2011-4333"},{"key":"e_1_2_10_10_1","volume-title":"Manual para exame androl\u00f3gico e avalia\u00e7\u00e3o de s\u00eamen animal","author":"Col\u00e9gio Brasileiro de Reprodu\u00e7\u00e3o Animal \u2010 CBRA","year":"2013"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1071\/AN12163"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.1590\/S0100-204X2008000100008"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.2527\/jas1979.4861299x"},{"issue":"2","key":"e_1_2_10_14_1","first-page":"108","article-title":"Avalia\u00e7\u00e3o da Maturidade Sexual e Classifica\u00e7\u00e3o Androl\u00f3gica por Pontos (CAP) de Touros Jovens da Ra\u00e7a Nelore, criados no Noroeste do Estado do Paran\u00e1","volume":"20","author":"Lopes F.","year":"2016","journal-title":"Unici\u00eancias"},{"key":"e_1_2_10_15_1","first-page":"119","article-title":"Bayesian estimates of genetic parameters for reproductive traits in Nellore cows raised on pasture in the tropics","volume":"29","author":"Magnabosco C. 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