scholarly journals Study on Genetic Variation of 4 Microsatellite DNA Markers and Their Relationship with Somatic Cell Counts in Cow Milk

2003 ◽  
Vol 16 (10) ◽  
pp. 1535-1539 ◽  
Author(s):  
Jin Hai-Guo ◽  
Zhou Guo-li ◽  
Cao Yang ◽  
Chu Ming-Xing
Keyword(s):  
Genetic Variation ◽  
Somatic Cell ◽  
Dna Markers ◽  
Microsatellite Dna ◽  
Cow Milk ◽  
Somatic Cell Counts ◽  
Cell Counts ◽  
Microsatellite Dna Markers

Effects of the CSN1AG allele on the clotting time of cow milk and on the rheological properties of rennet-curd

2001 ◽  
Vol 68 (1) ◽  
pp. 63-70 ◽  
Author(s):  
PRIMO MARIANI ◽  
ANDREA SUMMER ◽  
PAOLA DI GREGORIO ◽  
ANDREA RANDO ◽  
ENRICO FOSSA ◽  
...  
Keyword(s):  
Somatic Cell ◽  
Rheological Properties ◽  
Titratable Acidity ◽  
Cow Milk ◽  
Clotting Time ◽  
Somatic Cell Counts ◽  
Milk Samples ◽  
Cell Counts ◽  
Normal Ranges ◽  
Rennet Coagulation

The aim of this research was to study the effects of the CSN1AG allele on the main rennet coagulation properties of milk. The study was carried out on individual milk samples with low αs1-casein obtained from 19 Italian Brown cows heterozygous for the CSN1AG allele (seventeen CSN1A BG and two CSN1A CG) from four herds in the province of Parma (Italy). Control cows (sixteen CSN1A BB and three CSN1A BC) giving milk with normal αs1-casein levels were chosen from within the same herds in order to establish pairs of cows with identical environment and management conditions, and comparable lactation stages and numbers. Individual milk samples from single pairs of cows with somatic cell counts and lactose and chloride levels within the normal ranges were collected and analysed in parallel. Rennet coagulation properties of milk were analysed using Formagraph and Gel Tester. Milk from low αs1-casein cows was characterized by lower casein content, lower titratable acidity and a higher proportion of κ-casein in total casein. The clotting time of this milk was ∼ 23% lower than that obtained with milk from normal αs1-casein cows. Rennet curd from low αs1-casein milk was obtained more rapidly and had a higher final firmness: curd-firming time was ∼ 35% lower and curd firmness measured 30 min after rennet addition was ∼ 27 % higher compared with that for normal αs1-casein milk. In addition, curd from low αs1-casein milk had a higher resistance to compression. These results suggest that, although a role for the CSN2 locus cannot be definitely excluded, the CSN1AG allele can considerably affect the main rennet coagulation properties of milk.

Genetic Variation of Anastrepha suspensa (Diptera: Tephritidae) in Florida and the Caribbean Using Microsatellite DNA Markers

2010 ◽  
Vol 103 (6) ◽  
pp. 2214-2222 ◽  
Author(s):  
Laura M. Boykin ◽  
Robert G. Shatters ◽  
David G. Hall ◽  
David Dean ◽  
Peter Beerli
Keyword(s):  
Genetic Variation ◽  
Dna Markers ◽  
Microsatellite Dna ◽  
Anastrepha Suspensa ◽  
Microsatellite Dna Markers ◽  
The Caribbean

Total and differential bulk cow milk somatic cell counts and their relation with lipolysis

2008 ◽  
Vol 113 (2-3) ◽  
pp. 274-279 ◽  
Author(s):  
Ahmed Gargouri ◽  
Houda Hamed ◽  
Abdelfettah ElFeki
Keyword(s):  
Somatic Cell ◽  
Cow Milk ◽  
Somatic Cell Counts ◽  
Cell Counts

Associations between somatic cell counts at calving or prior to drying-off and clinical mastitis in the remaining or subsequent lactation

2006 ◽  
Vol 74 (1) ◽  
pp. 66-73 ◽  
Author(s):  
Anne Cathrine Whist ◽  
Olav Østerås
Keyword(s):  
Somatic Cell ◽  
Cox Regression ◽  
Reference Group ◽  
Geometric Mean ◽  
Dairy Herd ◽  
Clinical Mastitis ◽  
Cow Milk ◽  
Somatic Cell Counts ◽  
Cell Counts ◽  
Increased Risk

Data from 350 herds enrolled in the Norwegian Dairy Herd Recording System (NDHRS) were used to investigate the associations between the first two cow-milk somatic cell counts (SCC) test-days’ results after calving or the three last SCC test-days prior to drying off in the first lactation and the hazard ratio (HR) of clinical mastitis (CM) during the remaining first or the subsequent second lactation respectively. Altogether, 9519 first lactations and 6046 second lactations were included. Cox regression analyses adjusted for herd frailty effect were used. In the first lactation, SCC>40000 cells/ml on the first or second test-day was significantly associated with an increased risk of a CM event in the remaining first lactation. HR, compared with 10000 cells/ml, increased from 1·6 (1·4) for SCC of 40000–60000 cells/ml to 6·9 (4·2) for SCC >800000 cells/ml, when using the first (second) SCC test-day in the first lactation. Cows with a geometric mean of the three last SCC test-days between 50000 and 100000 cells/ml and between 401000 and 800000 cells/ml in the first lactation had HR of CM during the second lactation of 1·3 and 2·8 respectively compared with a reference group of 10000–20000 cells/ml. If a CM episode in the first lactation occurred, the HR for having a CM event during the second lactation was 1·5. There was a significant frailty effect which disappeared if the incidence rate of CM at herd level was included in the model.

Characteristics of Korean-Saanen goat milk caseins and somatic cell counts in comparison with Holstein cow milk counterparts

2010 ◽  
Vol 93 (2-3) ◽  
pp. 202-205 ◽  
Author(s):  
J.-S. Ham ◽  
S.-G. Lee ◽  
S.-G. Jeong ◽  
M.-H. Oh ◽  
D.-H. Kim ◽  
...  
Keyword(s):  
Somatic Cell ◽  
Goat Milk ◽  
Cow Milk ◽  
Saanen Goat ◽  
Somatic Cell Counts ◽  
Holstein Cow ◽  
Cell Counts

scholarly journals Development of Novel Microsatellite DNA Markers by Cross-Amplification and Analysis of Genetic Variation in Gerbils

2010 ◽  
Vol 101 (6) ◽  
pp. 710-716 ◽  
Author(s):  
Xiaoyan Du ◽  
Zhenwen Chen ◽  
Wei Li ◽  
Yuanqing Tan ◽  
Jing Lu ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Dna Markers ◽  
Microsatellite Dna ◽  
Cross Amplification ◽  
Microsatellite Dna Markers
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