+ Site Statistics
References:
52,654,530
Abstracts:
29,560,856
PMIDs:
28,072,755
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn

+ Translate
+ Recently Requested

Heterogeneous within herd variance 2. genetic relationships between milk yield and calving interval in grade holstein cows



Heterogeneous within herd variance 2. genetic relationships between milk yield and calving interval in grade holstein cows



Journal of Dairy Science 73(11): 3321-3329



Genetic and phenotypic (co)variances for mature equivalent yield of 4% FCM and calving interval were simultaneously estimated by REML for grade Holstein cows in first and second parity. Data were 305-d mature equivalent lactation records and calving dates for 299,441 daughters of 2489 AI sires first calving from 1970 to 1985 in California, New York, or Texas. Data were divided into three time periods, and herds were partitioned into three within-herd-year phenotypic SD classifications for milk yield. Average FCM yield and calving interval increased with SD in all time periods for both parities. Genetic variance of calving interval showed no trend with SD of yield, although residual variances increased as SD of yield increased. Heritability of calving interval was less than .06 in all time periods and SD classes. Genetic correlations between first and second calving interval increased as SD of yield increased (.33 to .63), but phenotypic correlations were uniformly small. Genetic correlations between FCM and calving interval were largest in the highest SD class and for second lactations. Phenotypic correlations were small in every SD class. Even though milk yield and calving interval were positively (unfavorably) correlated genetically, the correlated response in calving interval was only about 1 d for each 100-kg increase in genetic merit for FCM yield.

(PDF emailed within 1 workday: $29.90)

Accession: 007397033

Download citation: RISBibTeXText



Related references

Heterogeneous within herd variance 1. genetic parameters for first and second lactation milk yields of grade holstein cows. Journal of Dairy Science 73(11): 3312-3320, 1990

Relationships between milk yield and calving interval in Holstein herds with heterogeneous variances for milk. Journal of Dairy Science 72(Suppl. 1): 58 (139), 1989

Effect of genetic and envionmental factors on milk yield of crossbred Holstein, Brown Swiss, Jersey and zebu cows. 3. Calving interval. Revista da Sociedade Brasileira de Zootecnia 17(4): 358-366, 1988

Short communication: Changes in the association between milk yield and age at first calving in holstein cows with herd environment level for milk yield. Journal of Dairy Science 90(10): 4830-4834, 2007

A comparison of milk yield, service period and calving interval in Holstein-Friesian cows in Mexico in relation to genetic origin and geographic location. Veterinaria, Mexico 9(4): 226, 1978

Relationships between age at 1st calving and calving interval and milk yield of cows of the recently established Bulgarian Red breed. Zhivotnov"dni Nauki 9(3): 73-81, 1972

Analysis of calving interval, age at first calving, and herd life in Japanese Holstein cows. Journal of Dairy Science 85(Supplement 1): 324, 2002

Relation between Holstein bulls' proofs for milk in USA and the milk yield, age at first calving, calving interval and survival to third calving of their F1 zebu progeny in Venezuela. Journal of Animal Breeding and Genetics 120(3): 171-180, 2003

Milk yield and calving interval in Holstein-Friesian X Gir cows at a high level of management. Pesquisa Agropecuaria Brasileira 18(2): 195-200, 1983

Effects of health disorders on milk yield and calving interval in Italian Holstein cows. Italian Journal of Animal Science 2(Suppl. 1): 160-162, 2003

Effects of health disorders on milk yield and calving interval in Italian Holstein cows. Italian Journal of Animal Science 2: 160-162, 2003

Effects of milk yield, and calving to first service interval, in determining herd fertility in dairy cows. Animal Reproduction Science 41(2): 109-117, 1996

The genetic relationships among milk yield, herd life and productive life in Holstein cows in Hokkaido, Japan. Journal of Dairy Science 84(Supplement 1): 410, 2001

Environmental effects on gestation length and calving interval in a herd of Holstein and Red and White Holstein cows in Parana State. Revista Brasileira de Reproducao Animal 13(1): 33-52, 1989

Short communication. Effects of some environmental factors and extended calving interval on milk yield of Red Holstein cows. Spanish Journal of Agricultural Research 10(3): 717-721, 2012