Genomic additive and dominance variance of milk performance traits

2014 ◽  
Vol 132 (1) ◽  
pp. 3-8 ◽  
Author(s):  
D. Wittenburg ◽  
N. Melzer ◽  
N. Reinsch
Keyword(s):  
Dominance Variance ◽  
Performance Traits ◽  
Milk Performance

Polymorphism of POU1F1 gene and PRL gene and their combined effects on milk performance traits in Chinese Hol-stein cattle

2011 ◽  
Vol 33 (12) ◽  
pp. 1359-1365 ◽  
Author(s):  
Xiang-Jie JIA ◽  
Chang-Fa WANG ◽  
Gui-Wen YANG ◽  
Jin-Ming HUANG ◽  
Qiu-Ling LI ◽  
...  
Keyword(s):  
Combined Effects ◽  
Performance Traits ◽  
Milk Performance ◽  
I Gene

scholarly journals An SduI polymorphism at intron 20 of the Chinese Holstein cow STAT4 gene and its effect on milk performance traits

2013 ◽  
Vol 12 (2) ◽  
pp. 1593-1602 ◽  
Author(s):  
X.M. Song ◽  
L. Zhang ◽  
J.F. Jiang ◽  
F.X. Shi ◽  
Y.Q. Jiang
Keyword(s):  
Chinese Holstein ◽  
Holstein Cow ◽  
Performance Traits ◽  
Milk Performance

scholarly journals Relationship between the insertion/deletion polymorphism within the promoter and the intron 1 sequence of the PRNP gene and milk performance traits in cattle

2011 ◽  
Vol 56 (No. 4) ◽  
pp. 151-156 ◽  
Author(s):  
J. Strychalski ◽  
U. Czarnik ◽  
M. Pierzchała ◽  
C.S. Pareek
Keyword(s):  
Protein Content ◽  
Milk Fat ◽  
Prnp Gene ◽  
Promoter Sequence ◽  
Protein Yield ◽  
Indel Polymorphism ◽  
Genomic Location ◽  
Intron 1 ◽  
Performance Traits ◽  
Milk Performance

Current studies on the prion protein (PRNP) gene polymorphism focus primarily on the causative mutations that influence BSE susceptibility in cattle. The specific genetic structure determined by the insertion/deletion (indel) polymorphism within the 23 bp promoter sequence and the 12 bp intron 1 sequence of the PRNP gene, and its genomic location suggest that this polymorphism can be a potential QTL marker. The objective of the present study was to determine whether the indel polymorphism within the promoter sequence (23 bp) and the intron 1 sequence (12 bp) of the PRNP gene can be used as a factor differentiating the values of milk performance traits. The experimental materials comprised 285 primiparous Polish Holstein-Friesian cows, daughters of two dihybrid (23ins-12ins/23del-12del) sires (progeny of sire 1 – 149 cows, progeny of sire 2 – 136 cows). The following milk performance traits were analysed: milk yield, milk fat yield, milk protein yield, fat and protein contents of milk during the first 305-day lactation. The polymorphism in the promoter region (23 bp) was found to have a significant (P = 0.040) effect on protein yield and a highly significant (P = 0.007) effect on the protein content of milk. The highest values of these traits were noted in 23 ins/del heterozygotes and the lowest in 23 del/del homozygotes. There was an interrelation between diplotype variants and the concentrations of milk components. The protein content of milk was highly significantly (P = 0.007) higher in 23ins-12ins/23del-12del heterozygotes and significantly (P = 0.028) higher in 23ins-12ins/23ins-12ins homozygotes, compared to 23del-12ins/23del-12del cows. 23ins-12ins/23del-12del heterozygotes were also characterized by a significantly (P = 0.046) higher fat content of milk, in comparison with 23del-12del/23del-12del homozygotes.

scholarly journals Assessment of ANXA9 SNP effects on milk performance traits in Polish Holstein-Friesian cows

2020 ◽  
Vol 18 (4) ◽  
pp. 57-62
Author(s):  
Hanna Kulig ◽  
◽  
Katarzyna Wojdak-Maksymiec ◽  
Małgorzata Szewczuk ◽  
◽  
...  
Keyword(s):  
Holstein Friesian ◽  
Performance Traits ◽  
Milk Performance ◽  
Friesian Cows

scholarly journals Schätzung genetischer Parameter für Testtagsergebnisse von Milchleistungsmerkmalen bei Bunten Deutschen Edelziegen

2004 ◽  
Vol 47 (2) ◽  
pp. 193-202
Author(s):  
D. Bömkes ◽  
H. Hamann ◽  
O. Distl
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Milk Fat ◽  
Genetic Parameters ◽  
Genetic Correlations ◽  
Protein Yield ◽  
Lower Saxony ◽  
Genetic Progress ◽  
Performance Traits ◽  
Milk Performance

Abstract. Title of the paper: Estimation of genetic parameters for test day records of milk performance traits in German Improved Fawn The objectives of this study were to estimate genetic parameters for milk performance traits of German Improved Fawn by using univariate und multivariate animal models. The analysis was based on 27,778 test day records of 1,848 German Improved Fawn with 3,574 lactation records distributed over 229 flocks in Lower Saxony, Saxony and Baden-Wuerttemberg. Milk records were sampled between 1988 and 2002. The animals in our analysis were the progeny of 455 sires and 1.148 does. Heritabilities estimated with a multivariate test day model with fixed regression were h2 = 0.19, 0.16 and 0.15 for milk, fat and protein yield. For fat and protein content and Somatic Cell Score (SCS) heritabilities were h2 = 0.17, 0.14 and 0.16, respectively. The additive genetic correlations between milk yield and fat as well as protein yield of German Improved Fawn were very high and positive (rg = 0.84 and rg = 0.77). Milk yield and milk contents were genetically negative correlated with rg = −0.28 for fat and rg = −0.22 for protein content. A moderate additive genetic correlation (rg = 0.48) between fat and protein content was estimated. There were no considerable additive genetic correlations between fat yield and protein content as well as between fat content and protein yield (rg = 0.05 and rg = 0.09). Additive genetic correlations between milk, fat or protein yield and SCS were high and negative, whereas additive genetic correlations between fat or protein content and SCS were low and positive. The genetic parameters estimated from field test records allow to achieve genetic progress in milk performance traits of German Improved Fawn.

scholarly journals Effect of Non-Genetic Factors on Standard Lactation Milk Performance Traits in Simmental Cows

2015 ◽  
Vol 15 (1) ◽  
pp. 211-220 ◽  
Author(s):  
D. Milun Petrović ◽  
Vladan Bogdanović ◽  
M. Milan Petrović ◽  
Snežana Bogosavljević-Bošković ◽  
Radojica Đoković ◽  
...  
Keyword(s):  
Milk Fat ◽  
Statistical Significance ◽  
Season Of Birth ◽  
Breeding Area ◽  
Birth Season ◽  
Performance Traits ◽  
Milk Performance ◽  
Fat Yield ◽  
Calving Season ◽  
Effect Of Age

AbstractThe effect of systematic and continuous environmental factors on milk performance traits over standard lactations in 2805 Simmental cows was evaluated using the general linear model. The systematic factors included the effect of farm or breeding area, calving season, year of birth, season of birth, lactation group and their interactions. The continuous factor analysed was the effect of age at first conception. The effect of farm, lactation group and calving season on standard lactation milk performance was found to be highly significant (P<0.01), excepting the effect of calving season on milk fat percent in standard lactations which showed statistical significance (P<0.05). The interactions between year and season of birth, farm and calving season, and farm and lactation group had a highly significant effect (P<0.01) on all performance traits studied. Age at first conception, as a continuous factor, had a highly significant effect (P<0.01) on milk yield and milk fat percent, and a non-significant effect on milk fat yield. The model used to correct the performance traits over standard lactations for the effect of systematic factors was highly significant (P<0.01). The variance of the model accounted for 20.06 and 37.31% of the total variance of milk fat yield and milk fat percent, respectively. The resulting coefficients of determination (R2) ranged from 0.20 for milk fat yield to 0.37 for milk fat percent.

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