Impact of Non-genetic Parameters Altering Milk Yield Performance in Zebu Cows

2021 ◽  
Author(s):  
M. Mohan ◽  
D.N. Das ◽  
K.P. Ramesha
Keyword(s):  
Milk Yield ◽  
Genetic Parameters ◽  
Genetic Factors ◽  
Yield Performance ◽  
Age At First Calving ◽  
Lactating Cows ◽  
Lactation Length ◽  
Length Increase ◽  
Significant Difference ◽  
Range Test

Background: Animal phenotype performance depends on both genetic and non-genetic factors, but mostly the genetic part analysed leaving non genetic parameters unnoticed. The aim of the study is to understand impact of non-genetic factors governing milk yield performance in Deoni cows. Methods: A total of 821 lactation records from 340 lactating cows (2002-2017) along with their age at first calving, parity, season of calving were collected. These data were standardized and analysed to find significant differences using Duncan’s multiple range Test. Result: Deoni cows showed significant increase (P less than 0.05) in both lactation milk yield and lactation length with increase in parity. Season of calving had significant affects (P less than 0.05) on lactation milk yield but not in lactation length. Increase in age at first calving revealed there was a significant difference (P less than 0.05) in both lactation milk yield and lactation length.

scholarly journals Effect of non-genetic factors on milk yields traits in Simmental cows raised subtropical climate condition

2018 ◽  
Vol 70 (1) ◽  
pp. 297-305 ◽  
Author(s):  
M. Bolacali ◽  
Y. Öztürk
Keyword(s):  
Milk Yield ◽  
Generalized Linear Model ◽  
Genetic Parameters ◽  
Genetic Factors ◽  
Management Strategies ◽  
Subtropical Climate ◽  
Yield Traits ◽  
Climate Conditions ◽  
Lactation Length ◽  
Birth Type

ABSTRACT The aim of this study was to identify non-genetic parameters affecting the milk yield traits of Simmental cows raised in subtropical climate conditions. Records on 1904 lactation events of Simmental cows (N=706) during 2001-2014 were included in this study. A generalized linear model was used to investigate the effect of non-genetic factors (calving year, season, and age; lactation number; birth type; and calf sex) on real milk yield (MY), adjusted 305-d lactation milk yield (305-d MY), adjusted mature-age 305-d lactation milk yield (305-d MAMY), lactation length (LL), and dry periods (DP). The MY, 305-d MY, 305-d MAMY, LL, and DP were 6413.04kg, 6060.30kg, 6871.21 kg, 329.88d, and 57.67d, respectively, in Simmental cows. The effects of calving year, birth type, and calf sex on MY were significant (P<0.05). Calving year, calving age, birth type, and calf sex had significant effects on 305-d MY (P<0.05). The 305-d MAMY was significantly affected by calving year, birth type, and calf sex (P<0.05). In conclusion, based on the findings of the present study, the milk yield traits of Simmental cows raised at subtropical climate conditions with ideal feeding and management strategies was in accordance with world standards.

scholarly journals Milk production and lactation length in Ankole cattle and Ankole crossbreds in Rwanda

2020 ◽  
Vol 52 (6) ◽  
pp. 2937-2943
Author(s):  
Maximillian Manzi ◽  
Lotta Rydhmer ◽  
Martin Ntawubizi ◽  
Claire D’Andre Hirwa ◽  
Callixte Karege ◽  
...  
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Mixed Linear Model ◽  
Yield Data ◽  
Ankole Cattle ◽  
Lactation Length ◽  
Breed Group ◽  
Significant Difference ◽  
Daily Milk Yield ◽  
Daily Milk

Abstract This study assessed daily milk yield (DMY), 100-day (MY100), and 305-day (MY305) milk yield, and lactation length (LL) in purebred Ankole cattle and Ankole crossbreds, and the influence of environmental factors on these traits. Milk yield data were obtained for 865 cows and 1234 lactations and analyzed using a mixed linear model. The overall least squares mean of DMY, MY100, and MY305 across breed groups was 2.7 L (N = 1234, SD = 1.7), 262 L (N = 959, SD = 176), and 759 L (N = 448, SD = 439), respectively, while the average lactation length was 256 days (N = 960, SD = 122). All factors included (breed group, season and year of calving, and parity) were significant for yield traits, except season of calving for MY305. First-parity cows had the lowest milk production, and fourth-parity cows the highest. For all traits, pure Ankole cows had the lowest milk yield. Among the crossbreds, there was no significant difference between Ankole × Friesian, Ankole-Jersey mother × Sahiwal sire, and Ankole-Sahiwal mother × Jersey sire, or between Ankole × Sahiwal and Ankole-Sahiwal mother × Sahiwal sire. It was concluded that Ankole crosses with Friesian or Jersey can be beneficial, even under a management system of limited nutrition as in Rwanda.

Milk yield and mammary function in dairy cows milked four times daily

1990 ◽  
Vol 57 (3) ◽  
pp. 285-294 ◽  
Author(s):  
J. Eric Hillerton ◽  
Christopher H. Knight ◽  
Alan Turvey ◽  
Stephen D. Wheatley ◽  
Colin J. Wilde
Keyword(s):  
Milk Yield ◽  
Enzyme Activities ◽  
Milk Protein ◽  
Lactating Cows ◽  
Milk Protein Content ◽  
Significant Difference ◽  
The Mean ◽  
Milking Frequency ◽  
Rate Of Decline

SummaryGroups of lactating cows and heifers were milked four times daily in two diagonally opposed glands for 4 weeks, and the effects on milk yield studied relative to twice-daily milked glands as controls. Mammary enzyme activities, in vitro synthesis rates of milk constituents and histological scoring were determined in mammary biopsy samples obtained at the end of this period. These were used for assessment of mammary function. Frequent milking increased milk yield only in the treated glands, the contralateral control glands continuing to decline in yield at ~ 2%/week. There was no significant difference in response between cows and heifers; the mean increase in yield was 10·4%. The rate of decline in milk yield tended to decrease with frequent milking, to ~ 1%/week. Consequently the yield of the treated glands continued to be elevated above that of the controls for some time after reversion to overall twice daily milking. Milk protein content was increased slightly by frequent milking. Mammary enzyme activities were ~ 18% higher in the treated glands than in the controls. Synthesis rates of lactose, casein and total protein were unaffected by milking frequency, but were all lower in the gland selected for the second biopsy, reflecting the reduction in milk yield caused by the first biopsy. DNA synthesis was increased by milking frequency, as were the size and number of epithelial cells in histological sections.

Effect of non-genetic factors on weekly test day milk yield records in Holdeo cattle of marathwada region

2019 ◽  
Author(s):  
B.N. Thorat ◽  
B.M. Thombre
Keyword(s):  
Least Squares ◽  
Milk Yield ◽  
Genetic Factors ◽  
Age At First Calving ◽  
Cross Breeding ◽  
Calving Season

The data on weekly test day milk yield of 411 HF x Deoni crossbred having 838 weekly test day milk yield were collected from records maintained at Cattle Cross Breeding Project, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani (Maharashtra) over a period of 38 years (1977 to 2014). The least squares mean of weekly test day milk yield were estimated by considering effect of period of calving, season of calving and age at first calving group. The overall mean weekly test day milk yield varied from 1.35 ± 0.08 kg to 7.52 ± 0.08 kg recorded during 43rd and 6th week, respectively. The period of calving exerted significant (P less tahn 0.01) influence on all 43 weekly test day milk yield. The season of calving had significant (P less than 0.05) influence on WTDY5 to WTDY9, WTDY11 to WTDY13 and WTDY42 and WTDY43. However, non-significant effect observed in WTDY1 to WTDY4, WTDY10 and WTDY14 to WTDY41. The variation due to age at first calving group was significant (P less than 0.01) in WTDY3 to WTDY5 and, non-significant in rest of the weekly test day milk yield.

Effect of age at first calving and other non-genetic factors on longevity and production traits in Holstein cattle under Vojvodina Province condition, Serbia

2019 ◽  
Author(s):  
D. Kuèeviæ ◽  
S. Dragin ◽  
I. Pihler ◽  
K. Èobanoviæ ◽  
T. Papoviæ ◽  
...  
Keyword(s):  
Milk Yield ◽  
Genetic Factors ◽  
Fixed Effect Model ◽  
Production Traits ◽  
Age At First Calving ◽  
Effect Model ◽  
Calving Season ◽  
Novi Sad ◽  
Effect Of Age ◽  
Vojvodina Province

The effect of age at first calving (AFC) and various non-genetic factors i.e. season of calving, farm and system of housing on longevity and production traits were investigated. Longevity traits were studied using total lifetime (TL), length of productive life (LPL) and number of lactations (NL) while production was researched using lifetime milk yield (LMY). Data of 2037 Holstein dairy cows were provided by the main breeding organizations at the Faculty of Agriculture, University of Novi Sad. The average values and variability of examined traits as well as the effect of factors on longevity and production traits were investigated using fixed effect model by general linear model (GLM) procedure in software package Statistica 13. Results showed highly significant effect of the AFC, calving season and farm, on all studied longevity traits (P less than 0.01), while non- significant effect was expressed on lifetime milk yield (P greater than 0.05). The mean of AFC, TL, LPL, NL and LMY for Holstein cows were 27.3, 67.5, 40.2 months, 2.45 and 18798.0 kg, respectively. The maximum values of LPL, NL and LMY were noticed for cows with age at first calving before 23 months of age. The LPL ranged from 47.88 (AFC less than 23 m) to 35.84 m (AFC>29 m) and declined progressively when the AFC is increased, particularly in cows calving at more than 29 m.

Milking performance of Blanco Orejinegro and Jersey crossbred cattle

1968 ◽  
Vol 70 (1) ◽  
pp. 65-72 ◽  
Author(s):  
Lucia Pearson ◽  
R. K. Waugh ◽  
Bernardo Salazar ◽  
F. M. Botero ◽  
O. Acosta
Keyword(s):  
Milk Yield ◽  
Calving Interval ◽  
Crossbred Cattle ◽  
Cattle Industry ◽  
Age At First Calving ◽  
Low Level ◽  
Genetic Causes ◽  
Lactation Length ◽  
The Andes

SUMMARYSamples of a Colombian criollo breed of cattle, the Blanco Orejinegro, and contemporary onequarter Jersey crossbreds were kept on a farm in the Andes. Records were included of all calvings which occurred over an 8-year period, giving totals of 1357 lactations from 514 purebreds and 424 lactations from 137 crossbreds.Age at first calving was about 41 months for both breed groups. Cattle were milked twice daily by hand without calf at foot. Mean lactation yields were 220 kg (purebreds) and 612 kg (crossbreds). The repeatability and heritability of milk yield are estimated. Statistics are also given for lactation length, daily yield, calving interval and butterfat percentage. The effects on yield of age at first calving and calving year were negligible, but month of calving was important.It is concluded that the low level of performance was partly due to failure to eject milk without calf at foot, at least in the case of the purebreds, and that this was itself mainly due to genetic causes. The improvement in yield due to crossbreeding was not accompanied by a loss of other desirable traits. The development of the local cattle industry is discussed in the light of these results and the general characteristics of the region.

Phenotypic and genetic parameters for milk yield in traditional Nublang cattle (Bos indicus) of Bhutan

2015 ◽  
Vol 57 ◽  
pp. 25-30
Author(s):  
Jigme Dorji ◽  
Dhendup ◽  
Iona M. MacLeod
Keyword(s):  
Milk Yield ◽  
Genetic Improvement ◽  
Genetic Parameters ◽  
Bos Taurus ◽  
Bos Indicus ◽  
Sustainable Utilization ◽  
Dual Purpose ◽  
Lactation Length ◽  
Daily Milk Yield ◽  
Daily Milk

SummaryThe Nublang is a unique dual-purpose breed ofBos indicuscattle found in Bhutan. They have been crossed with Mithun (Bos frontalis) andBos taurusbreeds in an effort to improve milk production leading to a decline in the population of purebred Nublang. An alternative to crossbreeding would be the genetic improvement of milk yield within purebred Nublang, thus allowing conservation and sustainable utilization of the pure breed. It is important to measure the genetic variability (heritability) of milk yield to assess the potential for genetic improvement within Nublang. Therefore this study estimated phenotypic and genetic parameters of milk yield using 2 052 test day milk yields from 66 cows recorded from 1997 to 2013 in the National Nublang Farm, Tashiyangphu. The average daily milk yield (DMY) was 2.12 ± 0.7 litres (N 2 052, range: 0.3–5.0 L, CV: 34 percent). Parity, month in milk and year all had a significant effect on DMY (P&lt; 0.05). The average lactation milk yield (LMY) was 519.2 ± 151 L (N: 261, range: 115–881.7, CV: 29.1 percent) and average lactation length was 239 days. LMY was significantly influenced by parity (P&lt; 0.05) and season of calving. The heritability of DMY and LMY was 0.22 ± 0.16 and 0.13 ± 0.20, respectively. The repeatability estimates were 0.45 ± 0.05 and 0.49 ± 0.08 for DMY and LMY, respectively. Overall the heritability and repeatability estimates of milk yields indicate potential for genetic improvement of milk yield in Nublang cattle through selection. However, it is recommended that a larger dataset is generated to enable more precise estimates of genetic parameters.

scholarly journals Genetic Parameters of First Lactation Milk Yield and Fertility Traits in Brown Swiss Cattle

2014 ◽  
Vol 14 (3) ◽  
pp. 545-557 ◽  
Author(s):  
Aziz Şahin ◽  
Zafer Ulutaş ◽  
Asiye Yýlmaz Adkinson ◽  
Robert W. Adkinson
Keyword(s):  
Milk Yield ◽  
Genetic Parameters ◽  
Genetic Correlations ◽  
Gestation Length ◽  
Yield Traits ◽  
Dry Period ◽  
Brown Swiss ◽  
Lactation Length ◽  
Fertility Traits ◽  
Brown Swiss Cattle

AbstractThis research was carried out to estimate variance components and genetic parameters for first lactation milk yield (lactation milk yield, 305-day milk yield, lactation length, and dry period) and some fertility traits (calving interval, gestation length and number of services per conception) of Brown swiss cattle reared at konuklar state farm located in konya province, turkey. data were collected on milk yield traits of 3, 769 first lactation Brown Swiss cattle during the period from 1990 to 2008. Variance components, genetic parameters, breeding values, and genetic correlations were estimated using multiple trait derivative free restricted maximum likelihood (mtdfreml) fitting an animal model. Heritability estimates were 0.26, 0.25, 0.10, 0.06, 0.07, 0.06 and 0.03 for lactation milk yield (lmy), 305-day milk yield (305 dmy), lactation length (ll), dry period (dp), calving interval (ci), gestation length (Gl), and number of services per conception (nsc), respectively. Genetic correlations between milk yield and fertility traits ranged from 0.31 to 0.95 and phenotypic correlations ranged from –0.026 to 0.75. Breeding values were estimated and used to characterize genetic trends across the time period investigated. The results showed that the first lactation milk yield traits can be used as selection criteria for development of effective genetic improvement programme in turkish Brown swiss cattle. in addition, the results indicate the essential for scheming an effective schedule for growth of genetic variability to improve the milk yield traits of Brown swiss cattle in this farm by way of selection.

Environmental and genetic factors affecting milk yield and quality in three Italian sheep breeds

2016 ◽  
Vol 84 (1) ◽  
pp. 27-31 ◽  
Author(s):  
Maria Selvaggi ◽  
Angela Gabriella D'Alessandro ◽  
Cataldo Dario
Keyword(s):  
Milk Yield ◽  
Genetic Factors ◽  
Quality Traits ◽  
Milk Traits ◽  
Factors Affecting ◽  
Sheep Breeds ◽  
Lactation Length ◽  
Yield And Quality ◽  
Lack Of Information ◽  
Heritability Estimates

The aims of the study described in the Research Communication were to determine the level of influence of some environmental factors on milk yield and quality traits, including lactose, and lactation length in ewes belonging to three different Italian breeds and to estimate the heritability for the same traits. A total of 2138 lactation records obtained from 535 ewes belonging to three different Italian breeds (Comisana, Leccese, and Sarda) were used. Breed significantly affected all of the considered traits. Moreover, year of lambing affected milk yield and lactation length without influence on milk quality traits. Parity affected significantly only the milk yield, whereas type of birth showed its effect on milk yield, fat, protein, and lactose yield. On the whole, the presently reported heritability estimates are within the range of those already obtained in other dairy breeds by other authors, with values for lactation length being very low in all the investigated populations. Considering the heritability estimates for lactose content and yield, to the best of our knowledge, there is a lack of information on these parameters in ovine species and this is the first report on heritability of lactose content and yield in dairy sheep breeds. Our results suggest that genetic variability for milk traits other than lactation length is adequate for selection indicating a good response to selection in these breeds.

scholarly journals Genetic parameters for milk yield, age at first calving and interval between first and second calving in milk buffaloes1

2007 ◽  
Vol 6 (sup2) ◽  
pp. 397-400 ◽  
Author(s):  
L. de Oliveira Seno ◽  
H. Tonhati ◽  
V.L. Cardoso ◽  
El Faro ◽  
R.C. Sesana ◽  
...  
Keyword(s):  
Milk Yield ◽  
Genetic Parameters ◽  
Age At First Calving
Sign in / Sign up

Export Citation Format

Share Document