EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Twinning in cattle: I. Foundation animals and genetic and environmental effects on twinning rate



Twinning in cattle: I. Foundation animals and genetic and environmental effects on twinning rate



Journal of Animal Science 68(7): 1867-1876



Foundation cows were selected using prior records from one of two sources, private herds or other projects at the Research Center. Comparing twinning rates before and after selection, the repeatability was lower for those from the first (.08) than for those from the second (.16) source with a combined value of .12. Realized heritability of single-parity twinning rate estimated from selection of parents and response in daughters of foundation females was .06. Paternal half-sib estimate of heritability of twinning rate was .02 +/- .07. Estimates of repeatability computed from calving records of females born in the project indicate that permanent environmental effects on twinning rate in cattle are small. Mean calving rate of females born in the project was 1.11 in the data set that included all data and 1.09 in the data set that excluded females from highly selected parents. Twinning rate was greater (P less than .05) in fall than in spring calving (1.13 vs 1.06). Data on twinning rate of a sample of the Swedish Friesian breed were summarized. Mean twinning rate of the Swedish Friesian breed is 2.57%. Age adjusted mean twinning rate of daughters of 32 half-sib sons of one particular Swedish Frieisan sire averaged 5.4% and ranged from .9% to 13.6%. There was no indication of a bimodal distribution, which would be expected if a single gene with a major effect on twinning rate were segregating. The estimated genetic standard deviation (sigma-xn) for mean twinning rates of the 32 sire progeny groups was 1.8%. Observed range among son progenies was .127 or 7.2 sigma-xn, in reasonable agreement with the hypothesis that twinning rate in this population is inherited as a quantitative trait.

(PDF emailed within 1 workday: $29.90)

Accession: 041876889

Download citation: RISBibTeXText

PMID: 2384380



Related references

Genetic and environmental parameters for ovulation rate, twinning rate, and weight traits in a cattle population selected for twinning. Journal of Animal Science 75(5): 1213-1222, 1997

Environmental and environmental parameters for ovulation rate, twinning rate, and weight traits in a cattle population for selected for twinning. Journal of animal science 75(5): 1213-1222, 1997

Twinning in cattle: II. Genetic and environmental effects on ovulation rate in puberal heifers and postpartum cows and the effects of ovulation rate on embryonic survival. Journal of Animal Science 68(7): 1877-1888, 1990

Increased twinning and cow productivity in beef cattle selected for ovulation and twinning rate. Proceedings of the 7th World Congress on Genetics Applied to Livestock Production, Montpellier, France, August, 2002 Session 8: 0-4, 2002

Association of a single nucleotide polymorphism in SPP1 with growth traits and twinning in a cattle population selected for twinning rate. Journal of Animal Science 85(2): 341-347, 2006

Association of a single, nucleotide polymorphism in SPP1 with growth traits and twinning in cattle population selected for twinning rate. Journal of Animal Science 85(2): 341-347, 2007

Association of a single nucleotide polymorphism in SPP1 with growth traits and twinning in a cattle population selected for twinning rate. Journal of animal science 85(2): 341-347, 2007

Genetic trend and environmental effects in a population of cattle selected for twinning. Journal of Animal Science 74(3): 522-528, 1996

Factors affecting twinning and effects of twinning in holstein dairy cattle. Journal of Animal Science 46(4): 950-956, 1978

Study of twinning and maternal effects in beef cattle subjected to induced twinning: a progress report. Beef cattle research report: (87-1) 34-37, 1987

Studies of twinning and maternal effects in beef cattle subjected to induced twinning: a progress report. 1987 Beef Cattle Research Report: ; 34-37, 1988

Factors affecting twinning and the effects of twinning in dairy cattle. Journal of Dairy Science 60(SUPPL 1): 77-78, 1977

Low twinning rate and seasonal effects on twinning in a fertile population, the Hutterites. International Journal Of Biometeorology. 37(3): 145-150, 1993

Variances of additive and dominance genetic effects for ovulation and twinning rates in a population selected for twinning. Journal of Animal Science 74(6): 1234-1239, 1996

Twinning in cattle: III. Effects of twinning on dystocia, reproductive traits, calf survival, calf growth and cow productivity. Journal of Animal Science 68(10): 3133-3144, 1990