{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,4]],"date-time":"2026-08-04T19:06:53Z","timestamp":1785870413437,"version":"3.56.0"},"reference-count":74,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2021,3,24]],"date-time":"2021-03-24T00:00:00Z","timestamp":1616544000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Fundaci\u00f3n para el Fomento y Promoci\u00f3n de la Investigaci\u00f3n y Transferencia de Tecnolog\u00eda Agropecuaria de Costa Rica (FIT-TACORI)","award":["F23-19"],"award-info":[{"award-number":["F23-19"]}]},{"DOI":"10.13039\/501100005388","name":"Instituto Tecnol\u00f3gico de Costa Rica","doi-asserted-by":"publisher","award":["VIE-Project 5402-2151-1015"],"award-info":[{"award-number":["VIE-Project 5402-2151-1015"]}],"id":[{"id":"10.13039\/501100005388","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>The aim of the study was to compare the morphometric features of sperm head size and shape from the Pietrain line and the Duroc \u00d7 Pietrain boar crossbred terminal lines, and to evaluate their relationship with reproductive success after artificial insemination of sows produced from crossbreeding the York, Landrace and Pietrain breeds. Semen samples were collected from 11 sexually mature boars. Only ejaculates with greater than 70% motility rate and &lt;15% of abnormal sperm were used for artificial inseminations (AI) and included in the study. Samples were analyzed using an ISAS\u00aev1 computer-assisted sperm analysis system for eight morphometric parameters of head shape and size (CASA-Morph). Sub-populations of morphometric ejaculates were characterized using multivariate procedures, such as principal component (PC) analysis and clustering methods (k-means model). Four different ejaculate sub-populations were identified from two PCs that involved the head shape and size of the spermatozoa. The discriminant ability of the different morphometric sperm variables to predict sow litter size was analyzed using a receiver operating characteristics (ROC) curve analysis. Sperm head length, ellipticity, elongation, and regularity showed significant predictive capacity on litter size (0.59, 0.59, 0.60, and 0.56 area under curve (AUC), respectively). The morphometric sperm sub-populations were not related to sow litter size.<\/jats:p>","DOI":"10.3390\/ani11040920","type":"journal-article","created":{"date-parts":[[2021,3,24]],"date-time":"2021-03-24T15:42:19Z","timestamp":1616600539000},"page":"920","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Predictive Capacity of Boar Sperm Morphometry and Morphometric Sub-Populations on Reproductive Success after Artificial Insemination"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0042-6178","authenticated-orcid":false,"given":"Vinicio","family":"Barquero","sequence":"first","affiliation":[{"name":"Animal Reproduction Laboratory, School of Agronomy, Costa Rica Institute of Technology, San Carlos Campus, Alajuela 223-21002, Costa Rica"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eduardo R. S.","family":"Roldan","sequence":"additional","affiliation":[{"name":"Department of Biodiversity and Evolutionary Biology, Museo Nacional de Ciencias Naturales (CSIC), 28006 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carles","family":"Soler","sequence":"additional","affiliation":[{"name":"Department of Cellular Biology, Functional Biology and Physical Anthropology, University of Valencia, Campus Burjassot, C\/Dr Moliner 50, 46100 Burjassot, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5316-1703","authenticated-orcid":false,"given":"Jes\u00fas L.","family":"Y\u00e1niz","sequence":"additional","affiliation":[{"name":"BIOFITER Research Group, Higher Polytechnic School of Huesca, Institute of Environmental Sciences of Arag\u00f3n (IUCA), University of Zaragoza, Ctra. Cuarte s\/n, 22071 Huesca, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marlen","family":"Camacho","sequence":"additional","affiliation":[{"name":"Animal Reproduction Laboratory, School of Agronomy, Costa Rica Institute of Technology, San Carlos Campus, Alajuela 223-21002, Costa Rica"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3191-6965","authenticated-orcid":false,"given":"Anthony","family":"Valverde","sequence":"additional","affiliation":[{"name":"Animal Reproduction Laboratory, School of Agronomy, Costa Rica Institute of Technology, San Carlos Campus, Alajuela 223-21002, Costa Rica"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,3,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"431","DOI":"10.1016\/j.theriogenology.2004.09.023","article-title":"Sperm factors related to in vitro and in vivo porcine fertility","volume":"63","author":"Gadea","year":"2005","journal-title":"Theriogenology"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"151","DOI":"10.4142\/jvs.2010.11.2.151","article-title":"Relationship between sperm quality traits and field-fertility of porcine semen","volume":"11","author":"Tsakmakidis","year":"2010","journal-title":"J. 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