<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242017000300249</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v8i3.4252</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Prototipo de evaluación genética nacional para fertilidad de vaquillas Simmental-Simbrah y Charolais-Charbray]]></article-title>
<article-title xml:lang="en"><![CDATA[Prototype of national genetic evaluation for heifers fertility in Simmental-Simbrah and Charolais-Charbray]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Baeza Rodríguez]]></surname>
<given-names><![CDATA[Juan José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vega Murillo]]></surname>
<given-names><![CDATA[Vicente Eliezer]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ríos Utrera]]></surname>
<given-names><![CDATA[Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Velázquez]]></surname>
<given-names><![CDATA[Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arechavaleta Velasco]]></surname>
<given-names><![CDATA[Miguel Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montaño Bermúdez]]></surname>
<given-names><![CDATA[Moisés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Campo Experimental Mocochá ]]></institution>
<addr-line><![CDATA[Mocochá Yucatán]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,INIFAP Campo Experimental La Posta ]]></institution>
<addr-line><![CDATA[Mpio de Medellín de Bravo Veracruz]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,INIFAP Campo Experimental Santiago Ixcuintla ]]></institution>
<addr-line><![CDATA[Santiago Ixcuintla Nayarit]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,INIFAP CENID ]]></institution>
<addr-line><![CDATA[Ajuchitlán Colón Querétaro]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2017</year>
</pub-date>
<volume>8</volume>
<numero>3</numero>
<fpage>249</fpage>
<lpage>258</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242017000300249&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242017000300249&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242017000300249&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN: El objetivo del presente estudio fue desarrollar un prototipo de evaluación genética multirracial para fertilidad de vaquillas (FERT) en las poblaciones Simmental-Simbrah y Charolais-Charbray. Se utilizó información de 49,943 hembras Simmental-Simbrah, nacidas entre 1984 y 2011 (EvSim) y de 49,871 hembras Charolais-Charbray, nacidas entre 1990 y 2011 (EvChar). Para el análisis, a FERT se le asignó un uno cuando la vaquilla parió antes de los 1,281 días de edad y un cero en caso contrario. Los estimadores de los componentes de varianza y los valores genéticos se obtuvieron ajustando un modelo lineal mixto para una sola característica. Los estimadores de heredabilidad fueron similares, 0.07 ± 0.008 y 0.06 ± 0.008, para EvSim y EvChar, respectivamente. La mediana del número de hembras por grupo contemporáneo fue 10, en un rango intercuartil de 5 a 20, en ambos casos, EvSim y EvChar. La mediana del número de hembras por familia de medias hermanas paternas fue 5 en ambos casos, EvSim y EvChar. Las diferencias esperadas en la progenie (DEP) de FERT variaron de: -5.79 a 8.72, -9.56 a 8.84, -7.94 a 8.22, y -7.29 a 6.14, para Simmental, Simbrah, Charolais y Charbray, respectivamente. Las heredabilidades estimadas indican que puede haber respuesta genética a la selección de FERT en las poblaciones evaluadas. Las tendencias genéticas estimadas muestran un cambio genético favorable en fertilidad de las cuatro razas durante el período 2007-2011. Los rangos de las DEP permiten identificar sementales sobresalientes para FERT.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT: The objective of this study was to develop a prototype of multibreed genetic evaluation for heifers&#8217; fertility (FERT) in Simmental-Simbrah and Charolais-Charbray populations. Information from 49,943 Simmental-Simbrah females born between 1984 and 2011 (EvSim) and 49,871 Charolais and Charbray females (EvChar), born between 1990 and 2011 were used. For the analysis, a one was assigned when a heifer calved before 1,281 d of age, otherwise a zero was assigned. Variance components estimates and breeding values were obtained by fitting a linear mixed model for a single trait. Estimates of heritability were similar, 0.07 ± 0.008 and 0.06 ± 0.008, for EvSim and EvChar, respectively. Median number of heifers per contemporary group was 10, with an interquartile range from 5 to 20, in both cases, EvSim and EvChar. Median number of paternal half sibs per family was 5 for both, EvSim and EvChar. The ranges of expected progeny differences (EPD) for FERT were: -5.79 to 8.72, -9.56 to 8.84, -7.94 to 8.22, and -7.29 to 6.14, for Simmental, Simbrah, Charolais and Charbray, respectively. Heritability estimates suggest that there may be genetic response to selection of FERT in the populations evaluated. Estimated genetic trends suggest a favorable genetic change of fertility in the four breeds during the period 2007 to 2011. The ranges of the EPD allowed identification of outstanding sires for FERT.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bovinos carne]]></kwd>
<kwd lng="es"><![CDATA[Heredabilidad]]></kwd>
<kwd lng="es"><![CDATA[Tendencias genéticas]]></kwd>
<kwd lng="en"><![CDATA[Beef cattle]]></kwd>
<kwd lng="en"><![CDATA[Heritability]]></kwd>
<kwd lng="en"><![CDATA[Genetic trends]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Efficiency of animal production - Molding the biological components]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dickerson]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>1970</year>
<volume>30</volume>
<page-range>849-59</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Considerations related to breed or biological type]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Van Eenennaam]]></surname>
<given-names><![CDATA[AL]]></given-names>
</name>
</person-group>
<source><![CDATA[Vet Clin Food Anim]]></source>
<year>2013</year>
<volume>29</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>493-516</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Review: reproductive traits and their heritabilities in beef cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cammack]]></surname>
<given-names><![CDATA[KM]]></given-names>
</name>
<name>
<surname><![CDATA[Thomas]]></surname>
<given-names><![CDATA[MG]]></given-names>
</name>
<name>
<surname><![CDATA[Enns]]></surname>
<given-names><![CDATA[RM]]></given-names>
</name>
</person-group>
<source><![CDATA[Prof Anim Sci]]></source>
<year>2009</year>
<volume>25</volume>
<page-range>517-28</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Johnston]]></surname>
<given-names><![CDATA[DJ]]></given-names>
</name>
</person-group>
<source><![CDATA[Genetic improvement of reproduction in beef cattle]]></source>
<year>2014</year>
<conf-name><![CDATA[ 10World congress of genetics applied to livestock production]]></conf-name>
<conf-date>2014</conf-date>
<conf-loc>Vancouver, Canada </conf-loc>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic analysis of female fertility traits in Canadian Simmentals]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jamrozik]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[McGrath]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Kemp]]></surname>
<given-names><![CDATA[RA]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[SP]]></given-names>
</name>
</person-group>
<source><![CDATA[Livest Sci]]></source>
<year>2012</year>
<volume>150</volume>
<page-range>302-9</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic association of sexual precocity with growth traits and visual scores of conformation, finishing, and muscling in Nelore cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shiotsuki]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[JAIIV]]></given-names>
</name>
<name>
<surname><![CDATA[Tonhati]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Albuquerque]]></surname>
<given-names><![CDATA[LG]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2009</year>
<volume>87</volume>
<page-range>1591-7</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetics of reproductive performance in seasonal calving beef cows and its association with performance traits]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Berry]]></surname>
<given-names><![CDATA[DP]]></given-names>
</name>
<name>
<surname><![CDATA[Evans]]></surname>
<given-names><![CDATA[RD]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2014</year>
<volume>92</volume>
<page-range>1412-22</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Román]]></surname>
<given-names><![CDATA[PSI]]></given-names>
</name>
<name>
<surname><![CDATA[Ríos]]></surname>
<given-names><![CDATA[UA]]></given-names>
</name>
<name>
<surname><![CDATA[Montaño]]></surname>
<given-names><![CDATA[BM]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[RA]]></given-names>
</name>
<name>
<surname><![CDATA[Vega]]></surname>
<given-names><![CDATA[MVE]]></given-names>
</name>
<name>
<surname><![CDATA[Sifuentes]]></surname>
<given-names><![CDATA[RAM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mejoramiento genético de los bovinos en el trópico]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[PE]]></given-names>
</name>
</person-group>
<source><![CDATA[Estado del arte sobre investigación e innovación tecnológica en ganadería bovino tropical]]></source>
<year>2015</year>
<edition>1</edition>
<page-range>99-152</page-range><publisher-name><![CDATA[REDGATRO-CONACYT]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estimates of (co)variance components for production and reproduction traits with different models in Fars native fowls]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ghorbani]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Tahmoorespur]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Maghsoudib]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Abdollahi-Arpanahi]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Livest Sci]]></source>
<year>2013</year>
<volume>151</volume>
<page-range>115-23</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic and phenotypic parameters and annual trends for growth and fertility traits of Charolais and Hereford beef cattle breeds in Kenya]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Orenge]]></surname>
<given-names><![CDATA[JSK]]></given-names>
</name>
<name>
<surname><![CDATA[Ilatsia]]></surname>
<given-names><![CDATA[ED]]></given-names>
</name>
<name>
<surname><![CDATA[Kosgey]]></surname>
<given-names><![CDATA[IS]]></given-names>
</name>
<name>
<surname><![CDATA[Kahi]]></surname>
<given-names><![CDATA[AK]]></given-names>
</name>
</person-group>
<source><![CDATA[Trop Anim Health Prod]]></source>
<year>2009</year>
<volume>41</volume>
<page-range>767-74</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<collab>SAS</collab>
<source><![CDATA[SAS/STAT software, Version 9.3 for Windows]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Cary, NC, USA ]]></publisher-loc>
<publisher-name><![CDATA[Copyright © 2002-2010 SAS Institute Inc]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Experimental approaches in utilizing breed resources]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dickerson]]></surname>
<given-names><![CDATA[GE]]></given-names>
</name>
</person-group>
<source><![CDATA[Anim Breed Abstr]]></source>
<year>1969</year>
<volume>37</volume>
<page-range>191-202</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="book">
<article-title xml:lang=""><![CDATA[Inbreeding and heterosis in animals]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dickerson]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<source><![CDATA[Proc Anim Breed Gen Symp in honor of Dr. Jay L. Lush]]></source>
<year>1973</year>
<publisher-loc><![CDATA[Champaing, IL ]]></publisher-loc>
<publisher-name><![CDATA[ASAS,ADSA and PSA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Williams]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Comparing logit and probit coefficients between models and across groups 2011]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic parameters for calving rate and calf survival from linear, threshold, and logistic models in a multibred beef cattle population]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guerra]]></surname>
<given-names><![CDATA[JLL]]></given-names>
</name>
<name>
<surname><![CDATA[Franke]]></surname>
<given-names><![CDATA[DE]]></given-names>
</name>
<name>
<surname><![CDATA[Blouin]]></surname>
<given-names><![CDATA[DC]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2006</year>
<volume>84</volume>
<page-range>3197-203</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Meyer]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<source><![CDATA[PX × AI: Algorithmics for better convergence in restricted maximum likelihood estimation]]></source>
<year>2006</year>
<conf-name><![CDATA[ Proc World Congr Genet Appl Livest Prod, 24-00]]></conf-name>
<conf-date>2006</conf-date>
<conf-loc> </conf-loc>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bertrand]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Cundiff]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Golden]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Kachman]]></surname>
<given-names><![CDATA[SD]]></given-names>
</name>
<name>
<surname><![CDATA[Quaas]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Van Vleck]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Williams]]></surname>
<given-names><![CDATA[RE]]></given-names>
</name>
</person-group>
<source><![CDATA[National cattle evaluation. In: Cundiff LV, Van Vleck LD, Hohenboken WD. Guidelines for uniform beef improvement programs]]></source>
<year>2010</year>
<edition>9</edition>
<page-range>65-82</page-range><publisher-loc><![CDATA[Raleigh, USA ]]></publisher-loc>
<publisher-name><![CDATA[North Carolina State University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estimates of genetic parameters and genetic trends for reproductive traits and weaning weight in Tabapuã cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bernardes]]></surname>
<given-names><![CDATA[PA]]></given-names>
</name>
<name>
<surname><![CDATA[Grossi]]></surname>
<given-names><![CDATA[DA]]></given-names>
</name>
<name>
<surname><![CDATA[Savegnago]]></surname>
<given-names><![CDATA[RP]]></given-names>
</name>
<name>
<surname><![CDATA[Buzanskas]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
<name>
<surname><![CDATA[Urbinati]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Bezerra]]></surname>
<given-names><![CDATA[LAF]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2015</year>
<volume>93</volume>
<page-range>5175-85</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estimates of genetic correlations between testicular measurements and female reproductive traits in cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Toelle]]></surname>
<given-names><![CDATA[VD]]></given-names>
</name>
<name>
<surname><![CDATA[Robinson]]></surname>
<given-names><![CDATA[OW]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>1985</year>
<volume>60</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>89-100</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estimates of heritability and repeatability for reproductive traits in Australian beef cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Meyer]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Hammond]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Parnell]]></surname>
<given-names><![CDATA[PF]]></given-names>
</name>
<name>
<surname><![CDATA[Mackinnon]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Sivarajasingam]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<source><![CDATA[Livest Prod Sci]]></source>
<year>1990</year>
<volume>25</volume>
<page-range>15-30</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic parameters for growth, puberty, and beef cow reproductive traits in a puberty selection experiment]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morris]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
<name>
<surname><![CDATA[Wilson]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Bennett]]></surname>
<given-names><![CDATA[GL]]></given-names>
</name>
<name>
<surname><![CDATA[Cullen]]></surname>
<given-names><![CDATA[NG]]></given-names>
</name>
<name>
<surname><![CDATA[Hickey]]></surname>
<given-names><![CDATA[SM]]></given-names>
</name>
<name>
<surname><![CDATA[Hunter]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
</person-group>
<source><![CDATA[N Z J Agr Res]]></source>
<year>2000</year>
<volume>43</volume>
<page-range>83-91</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estudo genético da precocidade sexual de novilhas em um rebanho Nelore]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[JAIIV]]></given-names>
</name>
<name>
<surname><![CDATA[Dias]]></surname>
<given-names><![CDATA[LT]]></given-names>
</name>
<name>
<surname><![CDATA[Albuquerque]]></surname>
<given-names><![CDATA[LG]]></given-names>
</name>
</person-group>
<source><![CDATA[R Bras Zootec]]></source>
<year>2005</year>
<volume>34</volume>
<page-range>1568-72</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Direct and correlated response to selection for yearling weight on reproductive performance of Nelore cows]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mercadante]]></surname>
<given-names><![CDATA[MEZ]]></given-names>
</name>
<name>
<surname><![CDATA[Packer]]></surname>
<given-names><![CDATA[UI]]></given-names>
</name>
<name>
<surname><![CDATA[Razook]]></surname>
<given-names><![CDATA[AG]]></given-names>
</name>
<name>
<surname><![CDATA[Cyrilo]]></surname>
<given-names><![CDATA[JNSG]]></given-names>
</name>
<name>
<surname><![CDATA[Figueiredo]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2003</year>
<volume>81</volume>
<page-range>376-84</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic parameters and relationships of heifer pregnancy and age at first calving with weight gain, yearling and mature weight in Nelore cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Boligon]]></surname>
<given-names><![CDATA[AA]]></given-names>
</name>
<name>
<surname><![CDATA[Albuquerque]]></surname>
<given-names><![CDATA[LG]]></given-names>
</name>
</person-group>
<source><![CDATA[Livest Sci]]></source>
<year>2011</year>
<volume>141</volume>
<page-range>12-6</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Heritability estimates of pregnancy rate in beef cows under natural mating]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Buddenberg]]></surname>
<given-names><![CDATA[BJ]]></given-names>
</name>
<name>
<surname><![CDATA[Brown]]></surname>
<given-names><![CDATA[CJ]]></given-names>
</name>
<name>
<surname><![CDATA[Johnson]]></surname>
<given-names><![CDATA[ZB]]></given-names>
</name>
<name>
<surname><![CDATA[Dunn]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Peterson]]></surname>
<given-names><![CDATA[HP]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>1989</year>
<volume>67</volume>
<page-range>2589-94</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Additive genetic parameter estimates for heifer pregnancy and subsequent reproduction in Angus females]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Doyle]]></surname>
<given-names><![CDATA[SP]]></given-names>
</name>
<name>
<surname><![CDATA[Golden]]></surname>
<given-names><![CDATA[BL]]></given-names>
</name>
<name>
<surname><![CDATA[Green]]></surname>
<given-names><![CDATA[RD]]></given-names>
</name>
<name>
<surname><![CDATA[Brinks]]></surname>
<given-names><![CDATA[JS]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2000</year>
<volume>78</volume>
<page-range>2091-8</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Application of continuous and binary trait methods to reproductive measures of Hereford cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Snelling]]></surname>
<given-names><![CDATA[WM]]></given-names>
</name>
<name>
<surname><![CDATA[MacNeil]]></surname>
<given-names><![CDATA[MD]]></given-names>
</name>
<name>
<surname><![CDATA[Golden]]></surname>
<given-names><![CDATA[BL]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>1996</year>
<volume>74</volume>
<numero>^s1</numero>
<issue>^s1</issue>
<supplement>1</supplement>
<page-range>115</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Additive genetic relationships between scrotal circumference, heifer pregnancy, and stayability in Nellore cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Van Melis]]></surname>
<given-names><![CDATA[MH]]></given-names>
</name>
<name>
<surname><![CDATA[Eler]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[Rosa]]></surname>
<given-names><![CDATA[GJM]]></given-names>
</name>
<name>
<surname><![CDATA[Ferraz]]></surname>
<given-names><![CDATA[JBS]]></given-names>
</name>
<name>
<surname><![CDATA[Figueiredo]]></surname>
<given-names><![CDATA[LGG]]></given-names>
</name>
<name>
<surname><![CDATA[Mattos]]></surname>
<given-names><![CDATA[EC]]></given-names>
</name>
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[HN]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2010</year>
<volume>88</volume>
<page-range>3809-13</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Fixed or random contemporary groups in genetic evaluations]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ugarte]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Alenda]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Carabano]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
</person-group>
<source><![CDATA[J Dairy Sci]]></source>
<year>1992</year>
<volume>75</volume>
<page-range>269-78</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Experimental design in the evaluation of genetic parameters]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Robertson]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Biometrics]]></source>
<year>1959</year>
<volume>15</volume>
<page-range>219-26</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A prototype national cattle evaluation for sustained reproductive success in Hereford cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[MacNeil]]></surname>
<given-names><![CDATA[MD]]></given-names>
</name>
<name>
<surname><![CDATA[Vukasinovic]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2011</year>
<volume>89</volume>
<page-range>1712-8</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Alternative contemporary group structure to maximize the use of field records: Application to growth traits of composite beef cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Santana Jr]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Eler]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[Ferraz]]></surname>
<given-names><![CDATA[JBS]]></given-names>
</name>
</person-group>
<source><![CDATA[Livest Sci]]></source>
<year>2013</year>
<volume>157</volume>
<page-range>20-7</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="">
<collab>Asociación Mexicana Simmental-Simbrah</collab>
<source><![CDATA[Sumario de sementales 2015]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Short communication: validation of two animal models for estimation of genetic trends for female fertility in Norwegian dairy cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Andersen-Ranberg]]></surname>
<given-names><![CDATA[IM]]></given-names>
</name>
<name>
<surname><![CDATA[Klemetsdal]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Heringstad]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<source><![CDATA[J Dairy Sci]]></source>
<year>2003</year>
<volume>86</volume>
<page-range>4090-2</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Pregnancy rate and first-service conception rate in Angus heifers]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bormann]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Totir]]></surname>
<given-names><![CDATA[LR]]></given-names>
</name>
<name>
<surname><![CDATA[Kachman]]></surname>
<given-names><![CDATA[SD]]></given-names>
</name>
<name>
<surname><![CDATA[Fernando]]></surname>
<given-names><![CDATA[RL]]></given-names>
</name>
<name>
<surname><![CDATA[Wilson]]></surname>
<given-names><![CDATA[DE]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2006</year>
<volume>84</volume>
<page-range>2022-5</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic evaluation of the probability of pregnancy at 14 months for Nellore heifers]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Eler]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Ferraz]]></surname>
<given-names><![CDATA[JB]]></given-names>
</name>
<name>
<surname><![CDATA[Dias]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[HN]]></given-names>
</name>
<name>
<surname><![CDATA[Evans]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Golden]]></surname>
<given-names><![CDATA[BL]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2002</year>
<volume>80</volume>
<page-range>951-4</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
