Selection for cow lifetime pregnancy rate using bull and heifer growth and reproductive traits in composite cattle
Genetic correlations of lifetime pregnancy rate with bull and heifer growth and reproductive traits in a beef composite population were estimated. Yearling scrotal circumference had an unfavorable genetic correlation (r g = −0.25) while yearling tonometer score was favorably related (r g = 0.22) t...
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| Veröffentlicht in: | Canadian journal of animal science 2000-09, Vol.80 (3), p.507-510 |
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| container_title | Canadian journal of animal science |
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| creator | Mwansa, P.B Kemp, R.A Crews, D.H. Jr Kastelic, J.P Bailey, D.R.C Coulter, G.H |
| description | Genetic correlations of lifetime pregnancy rate with bull and heifer growth and reproductive traits in a beef composite population were estimated. Yearling scrotal circumference had an unfavorable genetic correlation (r
g
= −0.25) while yearling tonometer score was favorably related (r
g
= 0.22) to lifetime pregnancy rate. Heifer pregnancy rate, birth weight, weaning weight, yearling weight and age at puberty in heifers had significant genetic correlations (r
g
= 0.97, 0.58, 0.57, 0.33 and −0.21, respectively) with lifetime pregnancy rate. Lifetime pregnancy rate may be successfully predicted by easy-to-measure heifer growth traits. Using indices including scrotal and heifer growth traits, annual genetic change in lifetime pregnancy rate may be increased 3.1 times compared with direct selection. Key words: Scrotal circumference, tonometer, pregnancy, reproduction, puberty |
| doi_str_mv | 10.4141/A99-135 |
| format | Article |
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g
= −0.25) while yearling tonometer score was favorably related (r
g
= 0.22) to lifetime pregnancy rate. Heifer pregnancy rate, birth weight, weaning weight, yearling weight and age at puberty in heifers had significant genetic correlations (r
g
= 0.97, 0.58, 0.57, 0.33 and −0.21, respectively) with lifetime pregnancy rate. Lifetime pregnancy rate may be successfully predicted by easy-to-measure heifer growth traits. Using indices including scrotal and heifer growth traits, annual genetic change in lifetime pregnancy rate may be increased 3.1 times compared with direct selection. Key words: Scrotal circumference, tonometer, pregnancy, reproduction, puberty</description><identifier>ISSN: 0008-3984</identifier><identifier>EISSN: 1918-1825</identifier><identifier>DOI: 10.4141/A99-135</identifier><language>eng</language><subject>body weight ; bulls ; cows ; dimensions ; genetic correlation ; growth ; heifers ; lifetime performance ; pregnancy rate ; puberty ; reproductive traits ; scrotum ; selection</subject><ispartof>Canadian journal of animal science, 2000-09, Vol.80 (3), p.507-510</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c280t-22c98bfce0b710e79e5351b845e9b7cc1cb83cdd373c7628c3f19cdef6366e83</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Mwansa, P.B</creatorcontrib><creatorcontrib>Kemp, R.A</creatorcontrib><creatorcontrib>Crews, D.H. Jr</creatorcontrib><creatorcontrib>Kastelic, J.P</creatorcontrib><creatorcontrib>Bailey, D.R.C</creatorcontrib><creatorcontrib>Coulter, G.H</creatorcontrib><title>Selection for cow lifetime pregnancy rate using bull and heifer growth and reproductive traits in composite cattle</title><title>Canadian journal of animal science</title><description>Genetic correlations of lifetime pregnancy rate with bull and heifer growth and reproductive traits in a beef composite population were estimated. Yearling scrotal circumference had an unfavorable genetic correlation (r
g
= −0.25) while yearling tonometer score was favorably related (r
g
= 0.22) to lifetime pregnancy rate. Heifer pregnancy rate, birth weight, weaning weight, yearling weight and age at puberty in heifers had significant genetic correlations (r
g
= 0.97, 0.58, 0.57, 0.33 and −0.21, respectively) with lifetime pregnancy rate. Lifetime pregnancy rate may be successfully predicted by easy-to-measure heifer growth traits. Using indices including scrotal and heifer growth traits, annual genetic change in lifetime pregnancy rate may be increased 3.1 times compared with direct selection. Key words: Scrotal circumference, tonometer, pregnancy, reproduction, puberty</description><subject>body weight</subject><subject>bulls</subject><subject>cows</subject><subject>dimensions</subject><subject>genetic correlation</subject><subject>growth</subject><subject>heifers</subject><subject>lifetime performance</subject><subject>pregnancy rate</subject><subject>puberty</subject><subject>reproductive traits</subject><subject>scrotum</subject><subject>selection</subject><issn>0008-3984</issn><issn>1918-1825</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNotkEtLAzEURoMoWKv4E8zO1Wge80iWpfiCgovW9ZC5czONTCclSS3998bH6vJdDmdxCLnl7KHkJX9caF1wWZ2RGddcFVyJ6pzMGGOqkFqVl-Qqxs88m7pqZiSscURIzk_U-kDBH-noLCa3Q7oPOExmghMNJiE9RDcNtDuMIzVTT7eYuUCH4I9p-_sJuA--P2TbF9IUjEuRuik7d3sfXTaASWnEa3JhzRjx5v_Oyeb5abN8LVbvL2_LxaoAoVgqhACtOgvIuoYzbDRWsuKdKivUXQPAoVMS-l42EppaKJCWa-jR1rKuUck5uf_TQvAxBrTtPridCaeWs_anVJtLtblUJu_-SGt8a4bgYvuxFoxLJrQoaynkN5HNZtc</recordid><startdate>20000901</startdate><enddate>20000901</enddate><creator>Mwansa, P.B</creator><creator>Kemp, R.A</creator><creator>Crews, D.H. Jr</creator><creator>Kastelic, J.P</creator><creator>Bailey, D.R.C</creator><creator>Coulter, G.H</creator><scope>FBQ</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20000901</creationdate><title>Selection for cow lifetime pregnancy rate using bull and heifer growth and reproductive traits in composite cattle</title><author>Mwansa, P.B ; Kemp, R.A ; Crews, D.H. Jr ; Kastelic, J.P ; Bailey, D.R.C ; Coulter, G.H</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c280t-22c98bfce0b710e79e5351b845e9b7cc1cb83cdd373c7628c3f19cdef6366e83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>body weight</topic><topic>bulls</topic><topic>cows</topic><topic>dimensions</topic><topic>genetic correlation</topic><topic>growth</topic><topic>heifers</topic><topic>lifetime performance</topic><topic>pregnancy rate</topic><topic>puberty</topic><topic>reproductive traits</topic><topic>scrotum</topic><topic>selection</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mwansa, P.B</creatorcontrib><creatorcontrib>Kemp, R.A</creatorcontrib><creatorcontrib>Crews, D.H. Jr</creatorcontrib><creatorcontrib>Kastelic, J.P</creatorcontrib><creatorcontrib>Bailey, D.R.C</creatorcontrib><creatorcontrib>Coulter, G.H</creatorcontrib><collection>AGRIS</collection><collection>CrossRef</collection><jtitle>Canadian journal of animal science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mwansa, P.B</au><au>Kemp, R.A</au><au>Crews, D.H. Jr</au><au>Kastelic, J.P</au><au>Bailey, D.R.C</au><au>Coulter, G.H</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Selection for cow lifetime pregnancy rate using bull and heifer growth and reproductive traits in composite cattle</atitle><jtitle>Canadian journal of animal science</jtitle><date>2000-09-01</date><risdate>2000</risdate><volume>80</volume><issue>3</issue><spage>507</spage><epage>510</epage><pages>507-510</pages><issn>0008-3984</issn><eissn>1918-1825</eissn><abstract>Genetic correlations of lifetime pregnancy rate with bull and heifer growth and reproductive traits in a beef composite population were estimated. Yearling scrotal circumference had an unfavorable genetic correlation (r
g
= −0.25) while yearling tonometer score was favorably related (r
g
= 0.22) to lifetime pregnancy rate. Heifer pregnancy rate, birth weight, weaning weight, yearling weight and age at puberty in heifers had significant genetic correlations (r
g
= 0.97, 0.58, 0.57, 0.33 and −0.21, respectively) with lifetime pregnancy rate. Lifetime pregnancy rate may be successfully predicted by easy-to-measure heifer growth traits. Using indices including scrotal and heifer growth traits, annual genetic change in lifetime pregnancy rate may be increased 3.1 times compared with direct selection. Key words: Scrotal circumference, tonometer, pregnancy, reproduction, puberty</abstract><doi>10.4141/A99-135</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 0008-3984 |
| ispartof | Canadian journal of animal science, 2000-09, Vol.80 (3), p.507-510 |
| issn | 0008-3984 1918-1825 |
| language | eng |
| recordid | cdi_crossref_primary_10_4141_A99_135 |
| source | EZB Free E-Journals |
| subjects | body weight bulls cows dimensions genetic correlation growth heifers lifetime performance pregnancy rate puberty reproductive traits scrotum selection |
| title | Selection for cow lifetime pregnancy rate using bull and heifer growth and reproductive traits in composite cattle |
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