AN ESTIMATION OF GENETIC PARAMETERS FOR SOME REPRODUCTIVE TRAITS AND THEIR RELATIONSHIPS TO MILK YIELD IN IRANIAN HOLSTEIN CATTLE

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

CHOOKANI A.; DADPASAND M.; MIRZAII H.R.; ROKOUII M.; SAYADNEJAD M.B.

Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Iranian Journal of Animal Science Year:2010 | Volume:40 | Issue:4 Page(s): 53-61

Download Full-Text

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Persian Verion

View:

1,014

Download:

Cites:

Information Journal Paper

Title

AN ESTIMATION OF GENETIC PARAMETERS FOR SOME REPRODUCTIVE TRAITS AND THEIR RELATIONSHIPS TO MILK YIELD IN IRANIAN HOLSTEIN CATTLE

Author(s)

Keywords

GENETIC PARAMETERSQ3

CALVING AGEQ2

CALVING INTERVALQ3

HOLSTEIN CATTLEQ3

Abstract

This study was conducted using production and reproduction records of HOLSTEIN CATTLE of Iran collected by Animal Breeding Center of Iran, during 1997 to 2007. The dataset consisted of 213402 records of lactation 1 to 4. The traits included in the analyses were milk and fat yield, CALVING INTERVAL, dry days and age at first calving. Variance as well as covariance components, genetic and phenotypic parameters were estimated using Restricted Maximum Likelihood as based on single and multiple trait analyses and through ASREML software. In single trait analysis, estimated heritabilities of milk yield were in the range of 0.14 to 0.25, fat yield from 0.08 to 0.19, CALVING INTERVAL from 0.02 to 0.04, age at first calving 0.14 and dry days 0.05 for lactation 1 to 4. There were no significant differences observed between estimates of heritabilities from single and two trait analyses. Genetic and phenotypic correlation between production and reproduction traits, were positive, with unfavorable Genetic correlations higher in magnitude than the phenotypic correlations. Genetic correlation of milk yield of first lactation (with CALVING INTERVAL and age at first calving) were 0.52 and 0.21, respectively. Genetic correlations of milk and fat yield (with CALVING INTERVAL of lactations to 4) were 0.52, 0.70, 0.63, 0.56 and 0.16, 0.56, 0.33, 0.44, respectively.

Cites

No record.

References

No record.

Cite

APA: Copy

CHOOKANI, A., DADPASAND, M., MIRZAII, H.R., ROKOUII, M., & SAYADNEJAD, M.B.. (2010). AN ESTIMATION OF GENETIC PARAMETERS FOR SOME REPRODUCTIVE TRAITS AND THEIR RELATIONSHIPS TO MILK YIELD IN IRANIAN HOLSTEIN CATTLE. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), 40(4), 53-61. SID. https://sid.ir/paper/193577/en

Vancouver: Copy

CHOOKANI A., DADPASAND M., MIRZAII H.R., ROKOUII M., SAYADNEJAD M.B.. AN ESTIMATION OF GENETIC PARAMETERS FOR SOME REPRODUCTIVE TRAITS AND THEIR RELATIONSHIPS TO MILK YIELD IN IRANIAN HOLSTEIN CATTLE. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)[Internet]. 2010;40(4):53-61. Available from: https://sid.ir/paper/193577/en

IEEE: Copy

A. CHOOKANI, M. DADPASAND, H.R. MIRZAII, M. ROKOUII, and M.B. SAYADNEJAD, “AN ESTIMATION OF GENETIC PARAMETERS FOR SOME REPRODUCTIVE TRAITS AND THEIR RELATIONSHIPS TO MILK YIELD IN IRANIAN HOLSTEIN CATTLE,” IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), vol. 40, no. 4, pp. 53–61, 2010, [Online]. Available: https://sid.ir/paper/193577/en

Related Journal Papers