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Genetic Parameters ...
Genetic Parameters of Atypical Progesterone Profiles in Holstein-Friesian Cows using Data from Four European Experimental Research Herds
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- Nyman, Sofia (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjursgenetik (HGEN),Department of Animal Breeding and Genetics
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- Johansson, Kjell (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjursgenetik (HGEN),Department of Animal Breeding and Genetics,Växa Sverige
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- De Koning, Dirk-Jan (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjursgenetik (HGEN),Department of Animal Breeding and Genetics
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visa fler...
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- Berglund, Britt (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjursgenetik (HGEN),Department of Animal Breeding and Genetics
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visa färre...
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(creator_code:org_t)
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- 2014
- 2014
- Engelska.
- Relaterad länk:
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https://res.slu.se/i...
Abstract
Ämnesord
Stäng
- Compromised fertility is a major problem in dairy herds. An objective way to classify estrus cycles is to analyze milk progesterone. The objective of this study was to estimate genetic parameters for measures of normal estrus cycles, delayed cyclicity, prolonged luteal phases and cessation of cyclicity in 1122 Holstein-Friesian cows with 1618 lactations. The heritability was moderate for delayed cyclicty (0.24) and commencement of luteal activity (0.23), but was low for prolonged luteal phase (0.02), luteal phase length (0.09) and inter-ovulatory interval (0.06). Little and no genetic variation was detected for inter-luteal interval and cessation of cyclicty, respectively. Moreover, delayed cyclicity and commencement of luteal activity were strongly genetically correlated with milk yield in early lactation (0.57±0.14 and 0.63±0.09, respectively) which may imply a deterioration of these traits with selection for higher milk yield.
Ämnesord
- LANTBRUKSVETENSKAPER -- Bioteknologi med applikationer på växter och djur -- Genetik och förädling inom lantbruksvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agricultural Biotechnology -- Genetics and Breeding in Agricultural Sciences (hsv//eng)
Publikations- och innehållstyp
- vet (ämneskategori)
- kon (ämneskategori)