scholarly journals Effect of different crossbreeds of Lacaune and East Friesian breeds on milk yield and basic milk parameters

2013 ◽  
Vol 61 (1) ◽  
pp. 93-98 ◽  
Author(s):  
Leona Konečná ◽  
Jan Kuchtík ◽  
Šárka Králíčková ◽  
Michaela Pokorná ◽  
Květoslava Šustová ◽  
...  
Keyword(s):  
Litter Size ◽  
Milk Yield ◽  
Milk Composition ◽  
The Other ◽  
F Protein ◽  
Total Solids ◽  
Organic Farm ◽  
Other Hand ◽  
Daily Milk Yield ◽  
Daily Milk

The aim of the study was to evaluate the effect of different crossbreeds (CB) of Lacaune (LC) and East Friesian (EF) breeds (LC 50 EF 50, LC 75 EF 25 and LC 87.5 EF 12.5) on daily milk yield (DMY) and basic milk composition (contents of total solids (TS), fat (F), protein (P), casein (C) and lactose (L) for the whole lactation. The evaluation of the interactions between CB and parity (PA) and between CB and litter size (LS) on above mentioned indicators was also an integral part of this study. The study was carried out on the organic farm in Valašská Bystřice. The factor of CB had a significant effect only on DMY and contents of P and C for the whole lactation whilst the higher proportion of LC breed in genotype, the higher DMY and the lower P and C contents. The CB x PA had a significant effect on all indicators except for the lactose content when in all CB the DMY increased with the increase of the lactation number. On the other hand, in all CB the contents of TS, F, P and C were relatively very variable depending on the parity. Lastly, as for the interaction between CB and LS, the ewes with twins produced significantly more milk compared to ewes with singles and these ewes had also significantly higher contents of P and C and not significantly higher contents of TS and F.

scholarly journals Effect of parity and stage of lactation on milk yield, composition and quality of organic sheep milk

2012 ◽  
Vol 60 (1) ◽  
pp. 71-78 ◽  
Author(s):  
Šárka Králíčková ◽  
Michaela Pokorná ◽  
Jana Kuchtík ◽  
Radek Filipčík
Keyword(s):  
Somatic Cell ◽  
Milk Yield ◽  
Total Protein ◽  
The Other ◽  
Total Solids ◽  
Stage Of Lactation ◽  
Sheep Milk ◽  
Other Hand ◽  
Daily Milk Yield ◽  
Daily Milk

Effect of parity (PA), stage of lactation (SL) and interaction of PA x SL on daily milk yield (DMY), composition (contents of total solids, fat, total protein and lactose) and quality (somatic cell and bacteria counts) of organic sheep milk were evaluated using 20 ewes of East Friesian which were reared on an organic farm in Habří. Ewes were on the 2nd (n = 10) and 3rd (n = 10) lactation. During the experiment ewes were reared on permanent pasture. The milk records and samplings were carried out on average 75th, 132th and 190th day of lactation. All parameters were determined by standard methods. The PA had a significant effect only on somatic cell count (SCC). On the other hand, SL had a significant effect on daily milk yield (DMY), contents of total solids (TS), total protein (TP) and lactose (L). The SL also had a significant effect on total bacteria count (TBC), psychrotrophic bacteria count (PBC), total coliform count (TCC) and SCC. The interaction of the PA x SL had a significant effect on DMY, TS and TP contents and PBC. Positive and significant correlations were found among the SL and contents of TS and TP. Significant and positive correlation was observed between the PA and SCC, but on the other hand, significant and negative correlation was found between the SL and SCC.

scholarly journals Effect of season, genotype and lactation on milk yield and composition of local and crossbred dairy cows reared under different feed base region

2016 ◽  
Vol 19 (1-2) ◽  
pp. 50-65
Author(s):  
MA Baset ◽  
KS Huque ◽  
NR Sarker ◽  
MM Hossain ◽  
MN Islam
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Block Design ◽  
Milk Composition ◽  
Base Region ◽  
Total Solids ◽  
Randomized Block Design ◽  
Daily Milk Yield ◽  
Daily Milk

A total of 160 cows, 10 cows in each of native (local cow) and crossbred (local × Holstein Friesian) origins differing in lactation were used in 2×2×2×2 factorial experiment using Randomized Block Design (RBD) to evaluate milk yield and composition of cows considering regions (good & poor feed base region), seasons (dry: Nov.–Feb. 2009 & wet: Jun.–Oct. 2009), genotypes and lactation. A “good and/or poor feed base” region was classified based on the availability of quantity and quality roughages throughout the year. The study revealed that the daily milk yield and 4% FCM of cows under good feed base condition were 6.76 and 6.49 kg, respectively and under poor feed base condition were 3.67 and 3.31 kg, respectively. Feed base region did not affect on milk fat and it was observed that the milk protein, lactose, solids-not-fat (SNF), minerals and total solids under good feed base condition were 37.9, 54.9, 100.9, 6.3 and 140.6 g/kg, respectively, whereas, under poor feed base condition the values were 36.3, 52.9, 98.0, 6.1 and 135.2 g/kg, respectively. Season did not affect milk yield and composition except minerals (6.5 g/kg vs. 5.9 g/kg). Genotypes significantly (p?0.01) influenced daily milk yield, the milk protein and minerals. Lactation did not affect milk yield and the milk protein, but influenced the fat, lactose, SNF, minerals and total solids. The interaction of feed base regions and seasons significantly (p?0.01) influenced milk yield and the milk fat and SNF. The milk protein and lactose was influenced by the interaction of feed bases region, seasons and lactation. Milk yield negatively correlated with fat per cent. The percentage of fat significantly (p?0.01) correlated with protein, lactose, SNF, and minerals %. The percentage protein correlated with lactose, SNF and minerals. Lactose % significantly (p?0.01) correlated with SNF%. It may be concluded that milk yield and composition depends on feed base region, genotype and lactation of cows. Season did not influence milk yield and the composition. Milk yield negatively correlated with the percentage of fat, protein, lactose, SNF and milk composition strongly correlated with each other.Bangladesh J. of Livestock Res. 19(1-2): 50-65, Jan-Dec 2012

Genetic analysis of milk production and composition in crossbred ewes from different maternal genotypes

2009 ◽  
Vol 49 (1) ◽  
pp. 24 ◽  
Author(s):  
R. A. Afolayan ◽  
N. M. Fogarty ◽  
J. E. Morgan ◽  
G. M. Gaunt ◽  
L. J. Cummins ◽  
...  
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Genetic Correlations ◽  
Milk Composition ◽  
The Other ◽  
Separate Analysis ◽  
Daily Milk Yield ◽  
Sire Breed ◽  
Daily Milk

Milk production and milk composition were measured in 1056 crossbred ewes managed under pasture grazing in a lamb production system. Most ewes were milked on three occasions at ~3, 4 and 12 weeks of lactation. The ewes were the progeny of mainly Merino dams and 91 sires from several maternal crossing breeds including Border Leicester, East Friesian, Finnsheep and Coopworth. The ewes were born over 3 years and run at three sites where they were joined naturally to meat rams. Most of the ewes were first parity (autumn-joined at 7 months of age and spring-joined at 14–17 months of age), with the remainder second or third parity. The cohorts of ewes and sites were linked genetically by three common maternal sires. The 4-h oxytocin-induced milking procedure was used to estimate daily milk production and milk samples were analysed for composition (fat%, protein% and lactose%). Daily milk yield and milk composition traits were analysed using restricted maximum likelihood mixed models procedures. The sire breed of crossbred ewes was significant for milk yield (P < 0.01), fat% (P < 0.01) and lactose% (P < 0.05). There was a significant (P < 0.01) interaction of sire breed × days of lactation, mainly due to the relatively higher milk yield of the East Friesian and White Suffolk cross ewes compared with the other crosses, at the end of the lactation. The East Friesian cross ewes had lower milk fat% than the other cross ewes. Ewes suckling multiple lambs had 29% higher peak milk yield than those bearing and suckling single lambs (P < 0.001). There was an increase in peak milk yield of the ewes from first to second parity, and third parity ewes had a greater decline to the end of lactation causing a significant interaction (P < 0.001). The overall decline in milk yield from peak to late lactation was –21.2 ± 0.7 g/day. Separate analysis showed a significant increase in milk yield with ewe pre-joining weight (regression 6.1 ± 1.8 g/day.kg). The estimate of heritability for daily milk yield was 0.24 ± 0.04 at 90 days of lactation and 0.10 ± 0.02 at 21 days of lactation. The estimates of heritability for the milk composition traits were generally moderate. Estimates of genetic correlations between measurements early and late in the lactation for milk yield and most composition traits were high. The within ewe by stage variance component estimates of repeatability were moderate to high for milk yield, fat% and protein%, with lactose% being low.

scholarly journals Covariance components by a repeatability model in Slovenian dairy sheep using test-day records

2009 ◽  
Vol 54 (No. 9) ◽  
pp. 426-434 ◽  
Author(s):  
A. Komprej ◽  
G. Gorjanc ◽  
D. Kon ◽  
M. Kovač
Keyword(s):  
Protein Content ◽  
Litter Size ◽  
Milk Yield ◽  
Genetic Correlations ◽  
Dairy Sheep ◽  
Milk Traits ◽  
Environment Effect ◽  
Covariance Components ◽  
Daily Milk Yield ◽  
Daily Milk

The estimation of covariance components for daily milk yield, fat and protein content was performed in three Slovenian dairy sheep breeds (Bovec, Improved Bovec, and Istrian Pramenka). In the period 1994–2002, 38 983 test-day records of 3 068 ewes were collected according to ICAR regulations (method A4). All the available relationships between animals were considered. For that reason, information on 3 534 animals was included. Test-day records were analysed by a multiple-trait repeatability animal model. In its fixed part, the model contained breed and season of lambing as classes. Days after lambing, parity, and litter size were treated as covariates. Days after lambing were modelled with modified Ali-Schaeffer’s lactation curve, parity with quadratic, and litter size with linear regression. The random part of the model consisted of flock-test month effect, additive genetic effect, permanent environment effect over lactations, and permanent environment effect within lactation. Covariance components were estimated using the restricted maximum likelihood method (REML). The estimated heritabilities were 0.11 for daily milk yield, 0.08 for fat content, and 0.10 for protein content. A relatively high variance ratio for all milk traits was explained by the flock-test month effect (from 0.27 for daily milk yield to 0.57 for protein content), while ratios explained by both permanent environment effects were lower (up to 0.13). Additive genetic correlations between daily milk yield and fat content, and daily milk yield and protein content were negative and similar (–0.36 and –0.37). A high and positive (0.67) additive genetic correlation between fat and protein content was found. Correlations for environmental effects showed a pattern similar to additive genetic correlations. Genetic parameters estimated in Slovenian dairy sheep showed that genetic progress in milk traits could be achieved using test-day milk records.

Milk yield and milk composition from grazing primiparous non-dairy crossbred ewes

2006 ◽  
Vol 57 (4) ◽  
pp. 377 ◽  
Author(s):  
J. E. Morgan ◽  
N. M. Fogarty ◽  
S. Nielsen ◽  
A. R. Gilmour
Keyword(s):  
Weight Gain ◽  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Total Yield ◽  
Milk Composition ◽  
Ewe Lambs ◽  
Daily Milk Yield ◽  
Sire Breed ◽  
Daily Milk

Milk production and milk composition were studied in 520 primiparous Merino crossbred ewes that were the progeny of 30 sires from several maternal crossing breeds including Border Leicester, Coopworth, Finnsheep and East Friesian. The ewes were born in 3 years (1997, 1998, and 1999), with 3 sires used in every year to provide genetic links. The crossbred ewe lambs were randomly assigned to autumn or spring joining groups and mated to Poll Dorset rams to lamb at 12 or 19 months of age. Ewes were milked on 3 days during their first lactation at approximately 3, 4, and 12 weeks after lambing. On each milking day, each ewe was initially injected with oxytocin, milked out by machine, and then hand-stripped. This procedure was repeated approximately 4 h later, with the milk weight and time recorded to extrapolate to daily milk yield, and composition of the milk was determined. Daily milk yield was analysed using REML mixed models procedures and 3 measures of milk production were predicted: peak milk yield at 21 days of lactation, total milk yield from 21 to 90 days of lactation, and length of lactation (days for daily yield to decline to 600 g/day). Milk composition traits (%fat, %protein, %lactose) and proportion of machine milk yield were analysed with similar models. Sire breed, number of lambs born and suckled, season, and ewe weight gain from mid-pregnancy until lamb weaning were all significant (P < 0.01) for daily yield, which declined from 2.1 kg/day at 21 days to 0.7 kg/day at 90 days of lactation. The Finnsheep-cross ewes had lower peak milk yield (1.84 ± 0.08 v. 2.09–2.19 ± 0.1 kg/day) and lower total yield of lactation (21–90 days) than all the other breed-cross ewes (78 ± 3 v. 92–107 ± 5 kg). The East Friesian-cross ewes had significantly longer lactations (128.8 ± 10.9 days) than the Border Leicester (98.1 ± 4.4 days) and Coopworth (93.7 ± 4.2 days), with the Finnsheep-cross ewes the shortest (80.1 ± 3.1 days). The East Friesian-cross ewes had the greatest and the Finnsheep-cross ewes the least total yield of lactation (107 ± 5 and 78 ± 3 kg, respectively). There were significant differences in peak milk yield for ewes bearing and suckling single lambs, twin-born and single-raised lambs, and twin-born and raised lambs (1.86 ± 0.04, 2.03 ± 0.09, and 2.37 ± 0.07 kg/day, respectively). There was a significant decline in daily milk yield with increasing ewe weight gain from mid-pregnancy to lamb weaning (–18.1 ± 4.2 g/kg). All the components of milk composition changed from the peak of milk production at 3 weeks to the end of lactation. The East Friesian-cross ewes had significantly lower milk %fat (by approx. 1 percentage point) at both 21 days and 90 days of lactation than ewes by all other sire breeds. The 30 sire progeny mean deviations for daily milk yield ranged from –292 to +276 g/day, with considerable ranges between sires within the sire breeds. The implications for lamb production and breeding programs are discussed.

scholarly journals Application of correlation and regression analysis in the selection of black-and-white cows

2021 ◽  
Vol 282 ◽  
pp. 07020
Author(s):  
I.M. Donnik ◽  
O.S. Chechenikhina
Keyword(s):  
Regression Analysis ◽  
Milk Yield ◽  
Statistical Processing ◽  
Correlation Coefficients ◽  
Milk Composition ◽  
Black And White ◽  
Correlation And Regression Analysis ◽  
Daily Milk Yield ◽  
Selection Of ◽  
Daily Milk

The use of the method of correlation-regression analysis as the most widespread method of statistical processing of experimental data makes it possible to organize the selection of animals according to the leading characteristics of productivity. A positive and high correlation was established between milk yield and milk yield in all groups of studied animals (r = from 0.64 to 0.90), and between milk yield in 305 days of lactation and the highest daily milk yield - only in groups of Reflection Sovering and Montvik Chieftain cows. (r = 0.65 to 0.92). Cows of the Vis Back Aydial line have higher correlation coefficients between indicators of milk composition (r = from 0.72 to 0.91, depending on the trait). The calculation of the regression coefficients showed that in the studied groups of animals with an increase in the coefficient of constancy of lactation, the coefficient of milk production and the indicator of the highest daily milk yield per unit, the amount of milk for 305 days of lactation increased by an average of 1.63 - 221.04 kg.

scholarly journals Estimation of genetic parameters and prediction of breeding values for some economic traits of Black Bengal Goat under farming condition

2020 ◽  
Vol 20 (1-2) ◽  
pp. 8-17
Author(s):  
MA Jalil ◽  
S Akther ◽  
MP Choudhury ◽  
MA Habib
Keyword(s):  
Birth Weight ◽  
Litter Size ◽  
Milk Yield ◽  
Genetic Parameters ◽  
Breeding Values ◽  
Lactation Length ◽  
Total Milk ◽  
Daily Milk Yield ◽  
Black Bengal Goat ◽  
Daily Milk

The study was undertaken to evaluate the genetic progress of Black Bengal Goat (BBG) by estimating genetic parameters viz. heritability and breeding values for economically important productive and reproductive traits (birth weight, weight at 3, 6, 9 & 12 months, daily milk yield, lactation length, total milk yield and litter size of BBG goat population). Variance and co-variance components were analyzed applying Residual Maximum Likelihood (REML) approach by VCE 4.2.5 computer package. The heritability (h2) of birth weight was estimated as 0.2, which was low. The heritability estimates for 3-month weight (0.40), 6-month weight (0.50), 9-month weight (0.37) and 12-month weight (0.36) were found medium. Estimated h2 of daily milk yield, total milk yield and lactation length in this study were from 0.55 to 0.82.  h2 of litter size was 0.09. The maximum estimated breeding value (EBV) was found for 6 month body weight (12.94 kg), however, for daily milk yield, the value was 1.513 kg. The results found in this study revealed that genetic improvement of BBG for most of the traits is possible by selection and breeding. Bangladesh J. of Livestock Res. 20(1-2): 8-17, Jan-Dec 2013

scholarly journals Milk yield, composition and qua­li­ty of organic milk of ewes crossbreeds of Lacaune, East Friesian and Improved Wallachian during lactation

2009 ◽  
Vol 57 (2) ◽  
pp. 87-94 ◽  
Author(s):  
Michaela Pokorná ◽  
Jan Kuchtík ◽  
Květoslava Šustová ◽  
Táňa Lužová ◽  
Radek Filipčík
Keyword(s):  
Milk Yield ◽  
The Other ◽  
Clotting Time ◽  
Organic Milk ◽  
Organic Farm ◽  
Stage Of Lactation ◽  
Permanent Pasture ◽  
Cell Counts ◽  
Other Hand

Evaluation of milk yield, composition and quality of organic milk of crossbreeds of Lacaune (L), East Friesian (EF) and Improved Wallachian (IW), (n = 10, L 50 EF 43.75 IW 6.25) during lactation was carried out on organic farm in Valašská Bystřice in 2007. All sheep were on the third lactation and during study they were reared on permanent pasture. The stage of lactation (SL) had a highly significant effect on milk yield (MY) and contents of total solids (TS), fat (F), protein (P), casein (C), lactose (L) and urea (U). The SL had also a highly significant effect on pH and titrable acidity (TA), whereas on rennet clotting time (RCT) the SL had a significant effect. On the other hand the SL had not a significant effect on somatic cell counts (SCC) and rennet curd quality (RCQ). The highest contents of TS, F and C were found at the end of the lactation, whereas their lowest contents were found on the 120th day. Between the second and the last sampling the lactose content decreased. The content of U and RCT were the most variable indicators whithin the frame of our study. On the other hand SCCs were, during the whole lactation, very well-balanced and relatively low. Between pH and SCC was found positive correlation. TA gradually increased and RCT gradually prolonged with advanced lactation.

scholarly journals The effect of spring shearing on milk yield and milk composition in Tsigai ewes

2011 ◽  
Vol 27 (2) ◽  
pp. 241-249
Author(s):  
Y. Aleksiev
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Milk Composition ◽  
Daily Output ◽  
Lactose Concentration ◽  
Nutrient Partitioning ◽  
The Mean ◽  
Daily Milk Yield ◽  
Daily Milk

Milk yield and milk composition responses to shearing were assessed in Tsigai ewes kept indoors. Sheep was offered 700g/head daily concentrate and chopped hay administered ad libitum and was milked twice daily - at 08:00 and at 18:00 h. Average for the two weeks post-shearing, daily milk yield dropped by 7.2 % due to the 8.2 and 2.2 %, respectively, reduction in the morning and in the afternoon milk yields. Fat and protein concentrations in the morning and in the afternoon milk on day 1, day 7 and day 14 after shearing surpassed vastly pre-shearing values whilst milk lactose concentration showed a trend towards postshearing reduction. On the three sampling post-shearing days daily output of different milk constituents exceeded the corresponding mean pre-shearing values by 16.2, 11.6 and 9.1 % in milk fat, 1.6, 3.5 and 6.2 % in milk protein, and 4.1, 7.2 and 2.2 % in total solids. The increase in daily output of milk constituents occurred despite the decline in daily milk yield. Lactose daily output, on the contrary, dropped by 6.9, 7.7 and 9.3 % relative to the mean pre- shearing value. Postshearing adaptive adjustments including changes in nutrient partitioning appear to underlie the alterations in milk yield and milk composition. It may be concluded that post-shearing changes in milk composition makes for the improvement of milk processing characteristics.

scholarly journals EFFECT OF FEEDING OAK (Quercus aegilops) ACORNS ON MILK PRODUCTION, MILK COMPOSITION AND SOME BLOOD BIOCHEMICAL PARAMETERS OF BLACK GOATS

2021 ◽  
Vol 52 (1) ◽  
pp. 28-35
Author(s):  
Hoger M. Hidayet ◽  
Kamal N. Mustafa
Keyword(s):  
Milk Yield ◽  
Milk Protein ◽  
Control Diet ◽  
Milk Composition ◽  
Serum Glucose ◽  
Blood Biochemical ◽  
Milk Protein Content ◽  
Serum Biochemical ◽  
Daily Milk Yield ◽  
Daily Milk

 Twenty four Black goat does at 1st week post kidding were adapted to control diet for 2 weeks and then blocked into 4 groups (6 does/group) to be fed on one of the experimental diets (0, 5, 10 and 15% oak acorns) to study the effect of different levels of oak acorns on milk yield, milk composition and some serum biochemical traits. Results revealed that at 10th week of lactation, there was a significant increase in daily milk yield in does fed on 15% oak acorns. In contrast the group fed on 15% oak acorns exhibited a significant decrease in milk protein and solid non-fat contents at 10th week of lactation. The milk lactose yield was significantly higher in group fed on 15% oak acorns at 10th week of lactation. The serum glucose concentration at 8th week of lactation was significantly higher in does fed on 10% oak acorns while at 10th week; it was significantly higher in does fed 5% oak acorns. It could be concluded that feeding does on diets containing 15% oak acorns caused a significant increase in daily milk yield of Black goats and a significant decrease in milk protein content.

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