Genetic parameters for clinical mastitis, somatic cell score, production, udder type traits, and milking ease in first lactation Holsteins

被引:285
作者
Rupp, R [1 ]
Boichard, D [1 ]
机构
[1] INRA, SGQA, F-78352 Jouy En Josas, France
关键词
clinical mastitis; genetic parameters; somatic cell count; udder conformation;
D O I
10.3168/jds.S0022-0302(99)75465-2
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
Genetic parameters were estimated by restricted maximum likelihood with an animal model on first lactation data of 29,284 French Holstein cows for clinical mastitis, lactation somatic cell score, milking ease, production, and nine udder type traits. The heritability was low for clinical mastitis (0.024), moderate for lactation somatic cell score (0.17) and milking ease (0.17), and ranged from 0.17 to 0.30 for type traits. A high (0.72) but lower than unity genetic correlation was found between clinical mastitis and lactation somatic cell score and indicated that both traits were genetically favorably associated. The antagonism with production was stronger for clinical mastitis than for lactation somatic cell score (genetic correlations 0.45 and 0.15, respectively). Udder depth, fore-udder attachment, and udder balance were favorably associated with lactation somatic cell score and clinical mastitis with genetic correlations ranging from -0.29 to -0.46, whereas low correlations were found with teat length. Milking ease was found to be unfavorably correlated with lactation somatic cell score (genetic correlation 0.44) but not with clinical mastitis.
引用
收藏
页码:2198 / 2204
页数:7
相关论文
共 36 条
[1]   Development of an udder health index for sire selection based on somatic cell score, udder conformation, and milking speed [J].
Boettcher, PJ ;
Dekkers, JCM ;
Kolstad, BW .
JOURNAL OF DAIRY SCIENCE, 1998, 81 (04) :1157-1168
[2]  
BOICHARD D, 1997, INTERBULL B, V15, P54
[3]   A SIMULATION STUDY OF SELECTION METHODS TO IMPROVE MASTITIS RESISTANCE OF DAIRY-COWS [J].
COLLEAU, JJ ;
LEBIHANDUVAL, E .
JOURNAL OF DAIRY SCIENCE, 1995, 78 (03) :659-671
[4]  
DEJONG G, 1996, INTERBULL B, V12, P42
[5]  
DEMPSTER ER, 1950, GENETICS, V35, P212
[6]   GENETIC-PARAMETERS FOR TYPE TRAITS IN THE FRENCH HOLSTEIN BREED BASED ON A MULTIPLE-TRAIT ANIMAL-MODEL [J].
DUCROCQ, V .
LIVESTOCK PRODUCTION SCIENCE, 1993, 36 (02) :143-156
[7]   GENETIC-PARAMETERS FOR CLINICAL MASTITIS, SOMATIC-CELL COUNTS, AND MILK-PRODUCTION ESTIMATED BY MULTIPLE-TRAIT RESTRICTED MAXIMUM-LIKELIHOOD [J].
EMANUELSON, U ;
DANELL, B ;
PHILIPSSON, J .
JOURNAL OF DAIRY SCIENCE, 1988, 71 (02) :467-476
[8]  
GROEN AF, 1994, NETH J AGR SCI, V42, P371
[9]  
Heringstad B, 1997, INTERBULL B, V15, P45
[10]  
LARROQUE H, 1998, THESIS I NATL PARIS