Genetic Parameters and Correlations for Lactation Milk Yields According to Lactation Numbers in Jersey Cows

被引:0
|
作者
Unalan, Adnan [1 ]
Cankaya, Soner [2 ]
机构
[1] Nigde Univ, Vocat Sch Ulukisla, Dept Plant & Anim Sci, TR-51900 Ulukisla, Nigde, Turkey
[2] Ondokuz Mayis Univ, Fac Agr, Dept Anim Sci, TR-55139 Kurupelit, Samsun, Turkey
关键词
Jersey; Milk yield; Parity; REML; Heritability; Correlation; UNITED-STATES; HOLSTEIN; CATTLE; HERITABILITY; HERD;
D O I
暂无
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
In this study, heritabilities, genetic and phenotypic correlations for lactation milk yields were estimated using 3630 305-day lactation milk yield records obtained from cows calved from 1984 to 2007 years in Jersey cattle herd of Karakoy Agricultural State Farm in Samsun. Calving year. calving month and lactation number were assumed as fixed effect factors in statistical analysis of data. Heritabilities, genetic and phenotypic correlations were estimated by derivative-free REML with the animal model. Analysis showed that the overall means of 305-day milk yield, lactation length, dry off period and calving interval were 3467 kg, 297 days, 70 days and 367 days, respectively. Variance analysis results showed that all of the fixed effect factors were statistically significant on lactation milk yields (P<0.001). REML estimates of heritability were 0.289, 0.319, 0.324, 0.331, 0.339, 0.357 and 0.379 for lactation milk yields (from the first to seventh lactation numbers, respectively). Genetic correlations among the first and sub-sequent lactation milk yields were 0.687, 0.676, 0.631. 0.601, 0.590 and 0.551, respectively. All genetic correlations were high and statistically significant (P<0.01). High genetic correlations among lactation numbers reflected that the first lactation milk yield of cows would be useful indicator for the sub-sequent lactations and selection of breeding stock.
引用
收藏
页码:995 / 1000
页数:6
相关论文
共 50 条
  • [1] Genetic parameters for test day and lactation milk yields of first lactation Holstein cows
    de Melo, CMR
    Packer, IU
    Costa, CN
    Machado, PF
    REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE, 2005, 34 (03): : 796 - 806
  • [2] FACTORS AFFECTING LACTATION YIELDS IN JERSEY COWS
    BAGHERWAL, S
    KHAN, FH
    INDIAN VETERINARY JOURNAL, 1991, 68 (06): : 564 - 566
  • [3] A Comparison of Some Random Regression Models for First Lactation Test Day Milk Yields in Jersey Cows and Estimating of Genetic Parameters
    Cankaya, Soner
    Takma, Cigdem
    Abaci, Samet Hasan
    Ulker, Mehmet
    KAFKAS UNIVERSITESI VETERINER FAKULTESI DERGISI, 2014, 20 (01) : 5 - 10
  • [4] Finite dimension models to estimate genetic parameters for first lactation milk yields of Holstein cows
    Bignardi, Annaiza Braga
    El Faro, Lenira
    de Albuquerque, Lucia Galvao
    Cardoso, Vera Lucia
    Machado, Paulo Fernando
    CIENCIA RURAL, 2008, 38 (06): : 1705 - 1710
  • [5] GENETIC-PARAMETERS OF PART MILK YIELDS IN JERSEY COWS
    BAGHERWAL, S
    KHAN, FH
    INDIAN VETERINARY JOURNAL, 1991, 68 (09): : 838 - 840
  • [6] Genetic parameters for test day milk yields of first lactation Holstein cows by random regression models
    de Melo, C. M. R.
    Packer, I. U.
    Costa, C. N.
    Machado, P. F.
    ANIMAL, 2007, 1 (03) : 325 - 334
  • [7] Estimates of genetic parameters for test day and accumulated 305 day milk yields of first lactation Holstein cows
    Freitas Vargas, Anderson Daniel
    El Faro, Lenira
    Cardoso, Vera Lucia
    Machado, Paulo Fernando
    Cassoli, Laerte Dagher
    REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE, 2006, 35 (05): : 1959 - 1965
  • [8] Estimation of genetic parameters and correlations for the first three lactation milk yields in holstein Friesian cattle by the REML method
    Ünalan, A
    Cebeci, Z
    TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES, 2004, 28 (06): : 1043 - 1049
  • [9] Yields and persistency of lactation in Friesian and jersey cows milked once daily
    Hickson, R. E.
    Lopez-Villalobos, N.
    Dalley, D. E.
    Clark, D. A.
    Holmes, C. W.
    JOURNAL OF DAIRY SCIENCE, 2006, 89 (06) : 2017 - 2024
  • [10] Genetic parameters of lactation cell counts and milk and protein yields in dairy ewes
    El-Saied, UM
    Carriedo, JA
    De la Fuente, LF
    San Primitivo, F
    JOURNAL OF DAIRY SCIENCE, 1999, 82 (03) : 639 - 644