<?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>0120-0690</journal-id>
<journal-title><![CDATA[Revista Colombiana de Ciencias Pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Colom Cienc Pecua]]></abbrev-journal-title>
<issn>0120-0690</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ciencias Agrarias, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-06902019000200100</article-id>
<article-id pub-id-type="doi">10.17533/udea.rccp.v32n2a03</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Genetic parameters for milk yield and lactation persistency in the three first parities of Iranian Holstein cows]]></article-title>
<article-title xml:lang="es"><![CDATA[Parámetros genéticos para producción de leche y persistencia de la lactancia en los tres primeros partos de vacas Holstein en Iran]]></article-title>
<article-title xml:lang="pt"><![CDATA[Parâmetros genéticos para a produção de leite e persistência de lactação nas três primeiras paridades de vacas Holstein Iranianas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Shokri-Sangari]]></surname>
<given-names><![CDATA[Farzane]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Atashi]]></surname>
<given-names><![CDATA[Hadi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dadpasand]]></surname>
<given-names><![CDATA[Mohammad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Saghanejad]]></surname>
<given-names><![CDATA[Fateme]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Shiraz University Department of Animal Science ]]></institution>
<addr-line><![CDATA[Shiraz ]]></addr-line>
<country>Iran</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<volume>32</volume>
<numero>2</numero>
<fpage>100</fpage>
<lpage>106</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-06902019000200100&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-06902019000200100&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-06902019000200100&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  Lactation persistency influences cow health and reproduction and has an impact on the feed costs of dairy farms.  Objective:  To estimate (co)variance components and genetic parameters of 100- and 305-d milk yield, and lactation persistency in Holstein cows in Iran.  Methods:  Records collected from January 2000 to December 2012 by the Animal Breeding Center of Iran (Karaj, Iran) were used. The following four measures of lactation persistency were used: P21: Ratio of milk yield in the second 100-d in milk (DIM) divided by that of the first 100-d. P31: Ratios of milk yield in the third100-d divided by that of the first 100-d. PW: The persistency measure derived from the incomplete gamma function. PJ: The difference between milk yield in day 60th and 280th of lactation.  Results: The estimated heritability of lactation persistency for the three first parities (first, second, and third lactation) ranged from 0.01 to 0.06, 0.02 to 0.10, and 0.01 to 0.12, respectively. Genetic correlations among lactation persistency measures for the three first parities ranged from 0.77 to 0.98, 0.65 to 0.98, and 0.58 to 0.98, respectively; while corresponding values for genetic correlations among lactation persistency with 305-d milk production ranged from 0.18 to 0.63, 0.32 to 0.75, and 0.41 to 0.71, respectively. The estimated repeatability for lactation persistency measures ranged from 0.06 to 0.20.  Conclusion:  The moderate positive genetic correlation between lactation persistency and 305-d milk yield indicates that selection for increasing milk yield can slightly improve lactation persistency.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  La persistencia de la lactancia tiene una gran influencia en la salud, la reproducción y los costos de alimentación de las granjas lecheras.  Objetivo:  Estimar los componentes de (co)varianza y los parámetros genéticos de la producción de leche a 100 y 305 d, asi como la persistencia de la lactancia en vacas Holstein en Irán.  Métodos:  Se utilizaron registros recopilados entre enero de 2000 y diciembre de 2012 por el Centro de cría de animales de Irán (Karaj, Irán). Se utilizaron las siguientes cuatro medidas de persistencia de la lactancia: P21: Proporción de producción de leche en los segundos 100-d en leche (DIM) dividida por la de los primeros 100-d. P31: Proporcion de producción de leche en los terceros 100-d dividido por el de los primeros 100-d. PW: medida de persistencia derivada de la función gamma incompleta. PJ: diferencia entre el rendimiento de leche en el 60 y el 280 día de lactancia.  Resultados:  La heredabilidad estimada de la persistencia de la lactancia para los tres primeros partos (primera, segunda y tercera lactancia) varió de 0,01 a 0,06; 0,02 a 0,10; y 0,01 a 0,12, respectivamente. Las correlaciones genéticas entre las medidas de persistencia de lactancia para los tres primeros partos variaron de 0,77 a 0,98; 0,65 a 0,98; y 0,58 a 0,98, respectivamente; mientras que los valores correspondientes para las correlaciones genéticas entre la persistencia de la lactancia con la producción de leche a 305 d variaron de 0,18 a 0,63; 0,32 a 0,75; y 0,41 a 0,71, respectivamente. La repetibilidad estimada para las medidas de persistencia de la lactancia varió de 0,06 a 0,20.  Conclusión:  La correlación genética positiva moderada entre la persistencia de la lactancia y la producción de leche a 305-d indica que la selección para aumentar la producción de leche puede mejorar ligeramente la persistencia de la lactancia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Antecedentes:  A persistência da lactação tem grande influência nos custos de saúde, reprodução e alimentação em fazendas leiteiras.  Objetivo:  Estimar os componentes da variância (co)variância e os parâmetros genéticos da produção de leite de 100 e 305 d e a persistência da lactação em vacas Holandesas no Irã.  Métodos:  Os dados utilizados foram registros coletados de janeiro de 2000 a dezembro de 2012 pelo Centro de Criação de Animais do Irã (Karaj, Irã). As seguintes quatro medidas de persistência de lactação foram utilizadas: P21: Razão da produção de leite no segundo 100-d em leite (DIM) dividido pelo primeiro 100-d. P31: Razões da produção de leite na terceira 100d dividida pela da primeira 100-d. PW: A medida de persistência derivada da função gama incompleta. PJ: A diferença entre a produção de leite no 60º e 280º dia de lactação.  Resultados:  A hereditariedade estimada da persistência da lactação para as três primeiras paridades (primeira, segunda e terceira lactação) variou de 0,01 a 0,06; 0,02 a 0,10; e 0,01 a 0,12, respectivamente. As correlações genéticas entre as medidas de persistência da lactação para as três primeiras paridades variaram de 0,77 a 0,98; 0,65 a 0,98; e 0,58 a 0,98, respectivamente; enquanto os valores correspondentes para correlações genéticas entre a persistência da lactação com produção de leite de 305d variaram de 0,18 a 0,63; 0,32 a 0,75; e 0,41 a 0,71, respectivamente. A repetibilidade estimada para medidas de persistência de lactação variou de 0,06 a 0,20.  Conclusão:  A correlação genética positiva moderada entre a persistência da lactação e a produção de leite de 305d indicou que a seleção para aumentar a produção de leite melhoraria ligeiramente a persistência da lactação.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[dairy cattle]]></kwd>
<kwd lng="en"><![CDATA[heritability]]></kwd>
<kwd lng="en"><![CDATA[lactation curve]]></kwd>
<kwd lng="en"><![CDATA[milk yield]]></kwd>
<kwd lng="en"><![CDATA[persistency]]></kwd>
<kwd lng="en"><![CDATA[repeatability]]></kwd>
<kwd lng="es"><![CDATA[curva de lactancia]]></kwd>
<kwd lng="es"><![CDATA[ganado lechero]]></kwd>
<kwd lng="es"><![CDATA[heredabilidad]]></kwd>
<kwd lng="es"><![CDATA[persistencia]]></kwd>
<kwd lng="es"><![CDATA[producción de leche]]></kwd>
<kwd lng="es"><![CDATA[repetibilidad]]></kwd>
<kwd lng="pt"><![CDATA[curva de lactação]]></kwd>
<kwd lng="pt"><![CDATA[gado de leite]]></kwd>
<kwd lng="pt"><![CDATA[hereditariedade]]></kwd>
<kwd lng="pt"><![CDATA[persistência]]></kwd>
<kwd lng="pt"><![CDATA[produção de leite]]></kwd>
<kwd lng="pt"><![CDATA[repetibilidade]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Atashi]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Moradi Shahrbabak]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Abdolmohammadi]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Study of suggested measures of milk yield persistency and their relationships]]></article-title>
<source><![CDATA[Int J Agric Bio]]></source>
<year>2006</year>
<volume>8</volume>
<page-range>387-90</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Biassus]]></surname>
<given-names><![CDATA[IDO]]></given-names>
</name>
<name>
<surname><![CDATA[Cobuci]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[CN]]></given-names>
</name>
<name>
<surname><![CDATA[Rorato]]></surname>
<given-names><![CDATA[PRN]]></given-names>
</name>
<name>
<surname><![CDATA[Neto]]></surname>
<given-names><![CDATA[JB]]></given-names>
</name>
<name>
<surname><![CDATA[Cardoso]]></surname>
<given-names><![CDATA[LL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Persistence in milk, fat and protein production of primiparous Holstein cows by random regression models]]></article-title>
<source><![CDATA[Rev Bras Zootec]]></source>
<year>2010</year>
<volume>39</volume>
<page-range>2617-24</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Boujenan]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Hilal]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic and non-genetic effects for lactation curve traits in Holstein-Friesian cows]]></article-title>
<source><![CDATA[Anim Prod]]></source>
<year>2012</year>
<volume>5</volume>
<page-range>450-7</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Canaza-Cayo]]></surname>
<given-names><![CDATA[AW]]></given-names>
</name>
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[PS]]></given-names>
</name>
<name>
<surname><![CDATA[da Silva]]></surname>
<given-names><![CDATA[MVGB]]></given-names>
</name>
<name>
<surname><![CDATA[de Almeida Torres]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Martins M]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Arbex]]></surname>
<given-names><![CDATA[WA]]></given-names>
</name>
<name>
<surname><![CDATA[Cobuci]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic parameters for milk yield and lactation persistency using random regression models in Girolando cattle]]></article-title>
<source><![CDATA[Asian-Australas J Anim Sci]]></source>
<year>2015</year>
<volume>28</volume>
<page-range>1407-18</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cole]]></surname>
<given-names><![CDATA[JB]]></given-names>
</name>
<name>
<surname><![CDATA[Null]]></surname>
<given-names><![CDATA[DJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic evaluation of lactation persistency for five breeds of dairy cattle]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>2009</year>
<volume>92</volume>
<page-range>2248-58</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dekkers]]></surname>
<given-names><![CDATA[JCM]]></given-names>
</name>
<name>
<surname><![CDATA[Ten Hag]]></surname>
<given-names><![CDATA[JH]]></given-names>
</name>
<name>
<surname><![CDATA[Weersink]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Economic aspects of persistency of lactation in dairy cattle]]></article-title>
<source><![CDATA[Livest Prod Sci]]></source>
<year>1998</year>
<volume>53</volume>
<page-range>237-52</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gengler]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Persistency of lactation yields: A review. Proc. International Workshop on Genetic Improvement of Functional Traits in Cattle. Gembloux, Belgium]]></article-title>
<source><![CDATA[Interbull Bulletin]]></source>
<year>1996</year>
<numero>12</numero>
<issue>12</issue>
<page-range>87-96</page-range><publisher-loc><![CDATA[Uppsala, Sweden ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="">
<collab>ICAR (International Committee for Animal Recording)</collab>
<article-title xml:lang=""><![CDATA[Guidelines approved by the General Assembly held in Riga on June 2010. Section 2.1]]></article-title>
<source><![CDATA[ICAR Rules, Standards and Guidelines for Recording Milk and Milk Constituents]]></source>
<year>2011</year>
<page-range>23-56</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jakobsen]]></surname>
<given-names><![CDATA[JH]]></given-names>
</name>
<name>
<surname><![CDATA[Madsen]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Jensent]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Pedersen]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Christensen]]></surname>
<given-names><![CDATA[LG]]></given-names>
</name>
<name>
<surname><![CDATA[Sorensent]]></surname>
<given-names><![CDATA[DA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic parameters for milk production and persistency for Danish Holsteins estimated in random regression models using REML]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>2002</year>
<volume>85</volume>
<page-range>1607-16</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jakobsen]]></surname>
<given-names><![CDATA[JH]]></given-names>
</name>
<name>
<surname><![CDATA[Madsen]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Jensent]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Pedersen]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Christensen]]></surname>
<given-names><![CDATA[LG]]></given-names>
</name>
<name>
<surname><![CDATA[Sorensent]]></surname>
<given-names><![CDATA[DA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic parameters for milk production and persistency for Danish Holsteins estimated in random regression models using REML]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>2002</year>
<volume>85</volume>
<page-range>1607-16</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jamrozik]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Jansen]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Schaeffer]]></surname>
<given-names><![CDATA[LR]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Analysis of persistency of lactation calculated from a random regression test-day model]]></article-title>
<source><![CDATA[Interbull Bulletin]]></source>
<year>1998</year>
<numero>17</numero>
<issue>17</issue>
<page-range>64-9</page-range><publisher-loc><![CDATA[Uppsala, Sweden ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Johannsson]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Hansson]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Causes of variation in milk and butterfat yield of dairy cows]]></article-title>
<source><![CDATA[Kungl Lantbr Akad Tidskr]]></source>
<year>1940</year>
<volume>79</volume>
<page-range>1-127</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Macciotta]]></surname>
<given-names><![CDATA[NPP]]></given-names>
</name>
<name>
<surname><![CDATA[Dimauro]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Catillo]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Coletta]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Cappio-Borlino]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Factors affecting individual lactation curve shape in Italian river buffaloes]]></article-title>
<source><![CDATA[Livest Sci]]></source>
<year>2006</year>
<volume>104</volume>
<page-range>33-7</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Meyer]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[WOMBAT-A tool for mixed model analyses in quantitative genetics by restricted maximum likelihood (REML)]]></article-title>
<source><![CDATA[Journal of Zhejiang University Science B]]></source>
<year>2007</year>
<volume>8</volume>
<page-range>815-21</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muir]]></surname>
<given-names><![CDATA[BL]]></given-names>
</name>
<name>
<surname><![CDATA[Fatehi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Schaeffer]]></surname>
<given-names><![CDATA[LR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic relationships between persistency and reproductive performance in first-lactation Canadian Holsteins]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>2004</year>
<volume>87</volume>
<page-range>3029-37</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Otwinowska-Mindur]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Ptak]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic analysis of lactation persistency in the Polish Holstein-Friesian cows]]></article-title>
<source><![CDATA[Anim Sci Pap Rep]]></source>
<year>2015</year>
<volume>33</volume>
<page-range>109-17</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rekik]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Ben Gara]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Factors affecting the occurrence of atypical lactations for Holstein-Friesian cows]]></article-title>
<source><![CDATA[Livest Prod Sci]]></source>
<year>2004</year>
<volume>87</volume>
<page-range>245-50</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rekik]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Ben Gara]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Ben Hamouda]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Hammami]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fitting lactation curves of dairy cattle in different types of herds in Tunisia]]></article-title>
<source><![CDATA[Livest Prod Sci]]></source>
<year>2003</year>
<volume>83</volume>
<page-range>309-15</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Solkner]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Fuchs]]></surname>
<given-names><![CDATA[WA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[comparison of different measures of persistency with special respect to variation of test-day milk yields]]></article-title>
<source><![CDATA[Lives Prod Sci]]></source>
<year>1987</year>
<volume>16</volume>
<page-range>305-19</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Strabel]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Jamrozik]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic analysis of milk production traits of Polish Black and White cattle using large-scale random regression test-day models]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>2006</year>
<volume>89</volume>
<page-range>3152-63</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Swalve]]></surname>
<given-names><![CDATA[HH]]></given-names>
</name>
<name>
<surname><![CDATA[Gengler]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetics of lactation persistency]]></article-title>
<source><![CDATA[British Society of Animal Science. Occasional Publication]]></source>
<year>1999</year>
<volume>24</volume>
<page-range>75-82</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Swalve]]></surname>
<given-names><![CDATA[HH]]></given-names>
</name>
</person-group>
<source><![CDATA[Genetic relationships between test-day milk production and persistency in dairy cattle performance records]]></source>
<year></year>
<conf-name><![CDATA[ 5World Congress on Genetics Applied to Livestock Production]]></conf-name>
<conf-date>1994</conf-date>
<conf-loc>Guelph, Canada </conf-loc>
<page-range>467-70</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tekerli]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Akinci]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Dogan]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Akcan]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Factors affecting the shape of lactation curve of Holstein cows from the Balikesir Province of Turkey]]></article-title>
<source><![CDATA[J Dairy Sci]]></source>
<year>2000</year>
<volume>83</volume>
<page-range>1381-6</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[van der Linde]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Groen]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[de Jong]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estimation of genetic parameters for persistency of milk production in dairy cattle]]></article-title>
<source><![CDATA[Interbull Bulletin]]></source>
<year>2000</year>
<numero>25</numero>
<issue>25</issue>
<page-range>113-6</page-range><publisher-loc><![CDATA[Uppsala, Sweden ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wood]]></surname>
<given-names><![CDATA[PDP]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Algebraic model of the lactation curve in cattle]]></article-title>
<source><![CDATA[Nature]]></source>
<year>1967</year>
<volume>216</volume>
<page-range>164-5</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
