Genetic and non-genetic factors affecting productive and reproductive traits in Deoni cattle

2018 ◽  
Author(s):  
Sukanta Basak ◽  
D. N. Das ◽  
U. T. Mundhe
Keyword(s):  
Milk Yield ◽  
Genetic Factors ◽  
Cattle Breed ◽  
Reproductive Traits ◽  
Phenotypic Correlation ◽  
Dual Purpose ◽  
Factors Affecting ◽  
Lactation Length ◽  
Service Period ◽  
Dual Purpose Cattle

The present study was carried out in Deoni, the dual purpose cattle breed of Southern India, maintained at NDRI herd, SRS, Bengaluru. Mean phenotypic performances for the traits of age at first calving (AFC), first service period (FSP), first lactation milk yield (FLMY) and first lactation length (FLL) were estimated as 42.90 ± 0.49 months, 179.00 ± 6.3 days, 643.08 ± 25.16 kg and 178.24 ± 4.41 days respectively. Significant effect of parity was found on AFC and FSP. Effect of period of birth, period of calving and season of calving was found to be significant on FSP. Significant effect of period of birth, period of calving, classes of AFC and FLL were found on FLMY. The heritability of first lactation milk yield was estimated as 0.38 ± 0.29. Phenotypic correlation of FLMY with FLL (0.88 ± 0.02) was found to be highly significant (p Lass Than 0.01).

scholarly journals Genetics and Phenotypic Analysis of First Lactation Production, Reproduction and Part Lactation Traits in Frieswal Cattle

2021 ◽  
Author(s):  
Rajeev . ◽  
Ravinder Kumar
Keyword(s):  
Milk Yield ◽  
Cattle Breed ◽  
Phenotypic Correlation ◽  
Dry Period ◽  
Phenotypic Analysis ◽  
Climatic Regions ◽  
Lactation Length ◽  
Service Period ◽  
Total Milk ◽  
Reproduction Traits

Background: The Frieswal cattle a crossbred cattle breed having 62.50 per cent of exotic (inheritance) having total lactation milk yield of 4000 Kg with average lactation length 300 days (PDC Annual Report, 2015-16). Presently, the Frieswal Animal is mainly maintained at 36 Military Farms located in various agro-climatic regions in the country. Methods: The present study was undertaken on first Part lactation production, reproduction and part lactation records of 1470 Frieswal cows maintained over a period of 10 years (2003-2012) two military farms viz Meerut and Ambala at CIRC, Meerut. Result: The estimate the heritability of production and reproduction traits were 0.29 ±0 .098,0.142±.081, 0.130±0.079, 0.087 ±.074, 0.631 ± 0.255, 0.345 ± 0.247 and 0.100 ± 0.153 for standard 305 days milk yield, age of first calving (AFC), First lactation total milk yield (FLMY), First lactation 305-day or less milk yield (FL305DMY), First lactation length (FLL), Inter calving interval (ICI), First dry period (FDP), First Service Period (FSP), respectively. All the genetic and phenotypic correlation among different production and reproduction traits were high and positive. The estimates of heritability of first lactation individual part monthly yields in Frieswal cattle were found to be 0.100 ± 0.069, 0.105 ± .070, 0.100 ± 0.069, 0.112 ± 0.071, 0.204 ± 0.086, 0.160±0.079, 0.176 ± 0.081, 0.221 ± 0.088, 0.213 ± 0.087 and 0.192 ± 0.09, respectively. 

scholarly journals Genetic Parameters for First Lactation and Lifetime Traits of Nili-Ravi Buffaloes

2021 ◽  
Vol 8 ◽  
Author(s):  
Pooja Tamboli ◽  
Anurag Bharadwaj ◽  
Amit Chaurasiya ◽  
Yogesh Chandrakant Bangar ◽  
Andonissamy Jerome
Keyword(s):  
Genetic Correlation ◽  
Milk Yield ◽  
Phenotypic Correlation ◽  
Productive Life ◽  
Lactation Length ◽  
Service Period ◽  
Reproduction Traits ◽  
Genetic And Phenotypic Correlations ◽  
Breeding Efficiency ◽  
Estimation Of Variance

The data on first lactation and lifetime performance records of 501 Nili-Ravi were collected for a period from 1983 to 2017 (35 years) maintained at ICAR-Central Institute for Research on Buffaloes, Sub-Campus, Nabha, Punjab. The data were analyzed to calculate heritability, genetic and phenotypic correlation for first lactation traits, viz., Age at First Calving (AFC), First Lactation Total Milk Yield (FLTMY), First Lactation Standard (305 days or less) Milk Yield (FLSMY), First Peak Milk Yield (FPY), First Lactation Length (FLL), First Dry Period (FDP), First Service Period (FSP) and First Calving Interval (FCI), Herd Life (HL), Productive Life (PL), Productive Days (PD), Unproductive Days (UD), Breeding Efficiency (BE), Total Lifetime Milk Yield (Total LTMY), Standard Lifetime Milk Yield (Standard LTMY), Milk Yield Per Day of Productive Life (MY/PL), Milk Yield Per Day of Productive Days (MY/PD), and Milk Yield Per Day of Herd Life (MY/HL). For estimation of variance component and heritability separately for each trait, the uni-trait animal model was equipped, whereas to estimate genetic and phenotypic correlations between traits, bi-trait animal models were fitted. The estimates of heritability for production and reproduction traits of Nili-Ravi were medium, i.e., 0.365 ± 0.087, 0.353 ± 0.071, 0.318 ± 0.082, 0.354 ± 0.076, and 0.362 ± 0.086 for FLSMY, FDP, FSP, FCI, and AFC, respectively. The estimates of heritability were low, i.e., 0.062 ± 0.088, 0.123 ± 0.090, 0.158 ± 0.090, 0.155 ± 0.091, and 0.129 ± 0.091 for HL, PL, PD, Total LTMY, and Standard LTMY and high, i.e., 0.669 ± 0.096 for BE. Genetic correlation for FLTMY was high with FLL (0.710 ± 0.103), and genetic correlation of FLTMY was high and positive with HL, Total LTMY, MY/PL, and MY/PD while low and positive with PL. Genetic correlation of AFC was low and negative with PL, PD, UD, BE, Total LTMY, Standard LTMY, MY/PL, and MY/PD and negative with MY/HL. Significant positive phenotypic association of FPY was seen with FLTMY, FLSMY, FLL, AFC, HL, Total LTMY, and Standard LTMY. Higher heritability of first lactation traits especially FPY suggests sufficient additive genetic variability, which can be exploited under selection and breeding policy in order to improve overall performance of Nili-Ravi buffaloes.

scholarly journals Determining the Factors Affecting 305-Day Milk Yield of Dairy Cows with Regression Tree

2021 ◽  
Vol 9 (6) ◽  
pp. 1154-1158
Author(s):  
Serdar Genç ◽  
Mehmet Mendes
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Regression Tree ◽  
Dry Period ◽  
Data Set ◽  
Tree Analysis ◽  
Factors Affecting ◽  
Lactation Length ◽  
Regression Tree Analysis ◽  
Service Period

The purpose of this study was to determine the factors affecting the 305-day milk yield of dairy cattle by using Regression Tree Analysis (RTA). The data set of this study consisted of 8 different cattle breeds grown in Turkey. Breed (B), Province (P), Lactation Length (LL), Service Period (SP), Dry Period (DP), Parity (PR), Calving Year (CY), Calving Age (CA) and Calving Month (CM) were used to predict the 305-day milk yield. Results of RTM showed that the usage of this method might be appropriate for determining the important factors that would be able to affect the 305-day milk yield (R2=71.3%). It was seen that the most important factors affecting the 305-day milk yield were the Breed, Lactation Length, Province, and Parity. Therefore, those selected factors were more efficient than the others in predicting the 305-day milk yield. RTA results also indicated that the lowest milk yield was estimated for Jersey, Jersey Crossbred, and Yerli Kara. Among the highest 305-day milk yield cows, the milk yield estimates of the cows in the second, third, fourth, fifth, and the sixth parities were found significantly higher than that of the cows in the first and seventh parities.

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 Factors affecting lactation length and effect of current lactation length on the subsequent production and reproduction in Iranian Holsteins

2013 ◽  
Vol 56 (1) ◽  
pp. 873-881 ◽  
Author(s):  
N. G. Hossein-Zadeh
Keyword(s):  
Milk Yield ◽  
Reproductive Traits ◽  
Protein Yield ◽  
Fat Percentage ◽  
Factors Affecting ◽  
Protein Percentage ◽  
Lactation Length ◽  
Linear Relationships ◽  
Fat Yield ◽  
Increasing Trends

Abstract. Calving records of Holstein cows from January 1983 to December 2006 comprising 1,190 herds with 385,102 calving events were used to evaluate factors affecting the length of lactation and effect of current lactation length on the next productive and reproductive performances of Iranian Holsteins. Statistical analyses of productive and reproductive traits in this study were performed as linear mixed models. Lactation length (LL) of cows was grouped into 10 classes from <100 days through 500 days. Average LL was 314 days in Iranian Holsteins. Primiparous cows had the greatest LL and the mean of LL increased over the years from 1983 to 2006 and spring calvers had the longest LL (P<0.05). Cows within the LL class of 500 had the greatest unadjusted milk yield, adjusted milk yield, adjusted protein yield and adjusted fat yield and also had the longest calving intervals (P<0.05). Cows within the LL classes of 150–199 and 200–249 had the greatest values of adjusted protein percentage. Also, age at calving was the lowest for the LL class of 250–299 (P<0.05). There were linear and increasing trends for unadjusted milk yield, adjusted milk yield, adjusted protein yield and adjusted fat yield over the LL classes in this study, but a linear but decreasing trend was observed for adjusted protein percentage over LL classes. On the other hand, there were non-linear relationships between adjusted fat percentage, calving interval and age at calving with LL classes in the current study.

scholarly journals Factors Affecting Lactation Performance of Deoni Cattle

2020 ◽  
Vol 15 (04) ◽  
pp. 59-61
Author(s):  
Supriya G ◽  
Prashant Waghmare ◽  
Vivek Patil ◽  
Prakashkumar Rathod ◽  
Vidyasagar .
Keyword(s):  
Milk Yield ◽  
Genetic Factors ◽  
The Other ◽  
Age Group ◽  
Lactation Performance ◽  
Factors Affecting ◽  
Lactation Length ◽  
Performance Traits ◽  
Effect Of Age

The research was conducted on 78 lactation records of 78 Deoni cows over three years to analyze the effect of non-genetic factors on lactation performance traits. Data of lactation records were analyzed to determine the effect of age, parity, a period of calving and season of calving on lactation traits, viz., lactation milk yield (LMY), peak milk yield (PMY), lactation length (LL) and persistency of lactation. The findings revealed that age group and parity had a significant (p ≤0.05) effect on lactation milk yield, but not the period of calving and season of calving. Further, only the parity had a significant (P≤0.05) effect on peak milk yield of Deoni cattle but not the age group, period of calving, and season of calving. The other two traits, namely lactation length, and persistence was not influenced significantly by any the non-genetic factors evaluated in Deoni cattle.

Effect of Service Period, Gestation Period and Dry Period on Milk Production Traits in Kankrej Cattle

2016 ◽  
Vol 12 (2) ◽  
Author(s):  
Nawal Kishor Pareek ◽  
K. J. Ankuya ◽  
M. P. Patel ◽  
B. S. Rathod ◽  
K. B. Prajapati
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Genetic Factors ◽  
Gestation Period ◽  
Research Station ◽  
Production Traits ◽  
Milk Production Traits ◽  
Dry Period ◽  
Lactation Length ◽  
Service Period

The present investigation was undertaken to study the effect of non-genetic factors, viz., service period (SP), dry period (DP) and gestation period (GP) on various milk production traits in Kankrej cattle. 1235 lactation records (2nd-7th) of 475 Kankrej cows, progeny of 75 bulls that were maintained at University Livestock Research Station, Sardarkrushinagar (Gujarat), calved during 1980-2014, were studied. The effects of service period (111.64 ± 52.55 days) and dry period (143.17±28.78 days) on total lactation milk yield (2089.45±582.38 kg),305 days milk yield (2045.66±531.92 kg) and lactation length (282.90±49.46 days) were highly significant (pis less than 0.01), while the effect of gestation period (288.86±7.14 days) was non-significant on all these production traits. Cows which took more time to conceive after parturition produced more milk with longer lactation length

scholarly journals Factors affecting first lactation performance of Sahiwal cattle in Pakistan

2008 ◽  
Vol 51 (4) ◽  
pp. 305-317 ◽  
Author(s):  
Z. U. Rehman ◽  
M. S. Sajjad Khan ◽  
S. A. Bhatti ◽  
J. Iqbal ◽  
A. Iqbal
Keyword(s):  
Milk Yield ◽  
Lactation Performance ◽  
Genetic Trend ◽  
Age At First Calving ◽  
Factors Affecting ◽  
Lactation Length ◽  
Service Period ◽  
Total Milk ◽  
Sahiwal Cattle ◽  
Performance Traits

Abstract. To study the environmental and genetic factors affecting productive and reproductive traits, data on 5,897 cows from five main recorded herds (for 1964–2004) of Sahiwal cattle in Pakistan were used. A general linear model was applied on the data. The 305-day milk yield, total milk yield, lactation length, age at first calving, dry period, calving interval and service period averaged 1,393 ± 12 kg, 1,429 ± 11 kg, 235 ± 2, 1,390 ± 4, 244 ± 3, 464 ± 3 and 1,78 ± 3 days, respectively. The age at first calving was effected by herd, year and season of birth. The 305-day and total milk yields were affected by herd, year, season of calving, age at first calving, service period and lactation length while all other first lactation traits were affected by herd, year, season of calving and 305-day milk yield. Animal model heritability estimates for these traits were 0.11 ± 0.029, 0.11 ± 0.028, 0.09 ± 0.027, 0.02 ± 0.019, 0.05 ± 0.019, 0.12 ± 0.027 and 0.04 ± 0.020, respectively. Rate of decline in first lactation milk yield was 7 l per year over the last 35 years with genetic trend close to zero. Lactation length and service period decreased and age at first calving increased by 2, 1 and 6 days per year, respectively. Herd differences for most of the traits were significant. Improved feeding and management may improve performance traits of Sahiwal cattle. Accurate recording of pedigrees and performance traits would help improve genetic param

scholarly journals Buffaloes Production and Reproduction Efficiencies as Reviewed for Parity in Nepal

2020 ◽  
Vol 8 (1) ◽  
pp. 1-6
Author(s):  
Sadikshya Lamsal ◽  
Deepak Subedi ◽  
Krishna Kaphle
Keyword(s):  
Production Efficiency ◽  
Management Practices ◽  
Genetic Factors ◽  
Production Traits ◽  
Dry Period ◽  
Factors Affecting ◽  
Indigenous Breed ◽  
Lactation Length ◽  
Service Period ◽  
Reproduction Traits

Buffalo rearing is major part of Nepalese agriculture and they are reared for milk, meat, draft power and manure. Buffaloes are the main source of milk production in Nepal producing about 65.3% of the total annual milk in the country. Different indigenous breeds such as Lime, Parkote and Gaddi as well as Indian Murrah and Nili Ravi are recorded in Nepal and they are raised in different management and production system. Different genetic and non-genetic factors cause variation in production and reproduction performance between these breeds and within these breeds also. Non genetic factors affecting the performance of these buffaloes are season of calving, parity, management practices, nutrition etc. In this paper, effect of parity on production traits such as colostrum period, lactation length, lactation yield and days to reach peak milk yield as well as reproduction traits such as calving interval, dry period and service period are reviewed. Thus, this paper after reviewing related articles from various journals, proceedings and magazines is aimed to evaluate the effect of parity on reproductive and production efficiency of buffaloes of Nepal. Though the performance of indigenous breed is generally considered low, there is high potential of these breeds under proper breeding and management programs. Int. J. Appl. Sci. Biotechnol. Vol 8(1): 1-6.

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