Genetic potential of Sindhi cattle for A2 milk production

2020 ◽  
Vol 60 (7) ◽  
pp. 893
Author(s):  
Gustavo Pimenta Schettini ◽  
Sabrina Mota Lambert ◽  
Bárbara Maria Paraná da Silva Souza ◽  
Raphael Bermal Costa ◽  
Gregório Miguel Ferreira de Camargo
Keyword(s):  
Milk Production ◽  
Bos Taurus ◽  
Dairy Product ◽  
Hair Follicles ◽  
Genetic Profile ◽  
Genetic Potential ◽  
Hot Climate ◽  
Genotype Frequencies ◽  
Climate Resistance ◽  
The Tropics

ContextCow milk is consumed in many countries. However, its consumption can be associated with gastrointestinal disorders in humans. The genetic profile of β-casein is one of the factors responsible for these disorders and the A1 variant is a causal agent. The β-casein A1 leads to the formation of bioactive peptides, which trigger intestinal reactions. The same is not observed for the A2 allele. A2 milk is obtained from cows with the A2A2 genotype. The identification of breeds and selection of animals for A2 milk production is important for public health and animal production. The Sindhi cattle (Bos taurus indicus) possesses characteristics such as adaptation to hot climate, resistance to parasites and utilisation of low-quality forage that are important for rearing in the tropics. AimsThe objective of the present study was to genotype the single-nucleotide polymorphism (SNP) that forms A1 and A2 alleles of the β-casein in Sindhi cattle. MethodsIn total, 348 Sindhi animals were used. DNA was extracted from hair follicles and submitted to PCR-sequencing for genotyping. Key resultsAllele frequency for A2 was 0.94 and for A1 it was 0.06. Genotype frequencies were 0.90 (A2A2), 0.09 (A1A2) and 0.01 (A1A1). The frequency of the A2A2 genotype in Sindhi cattle was similar to or higher than those found in zebu breeds and higher than those reported for specialised taurine breeds. ConclusionsThis high frequency of the A2A2 genotype indicates a genetic potential of the breed for A2 milk production and easy, assisted selection (if that is the intention). ImplicationsThis information gives importance to the breed and permits to add value to dairy product derived from it. It may increase producer’s income through producing and marketing A2 milk.

CRC 'Regional Combinations' project — effects of genetics and growth paths on beef production and meat quality: experimental design, methods and measurements.

2005 ◽  
Vol 45 (8) ◽  
pp. 959 ◽  
Author(s):  
W. A. McKiernan ◽  
J. F. Wilkins ◽  
S. A. Barwick ◽  
G. D. Tudor ◽  
B. L. McIntyre ◽  
...  
Keyword(s):  
Meat Quality ◽  
Bos Taurus ◽  
Experimental Designs ◽  
Research Centre ◽  
Eating Quality ◽  
Beef Production ◽  
Cooperative Research ◽  
Beef Quality ◽  
Genetic Potential ◽  
And Storage

As a component of the second term of the Cooperative Research Centre (CRC) for Cattle and Beef Quality, a project to further test and validate the effects of varying nutritional growth paths pre-finishing and slaughter on cattle of varying genetic potential for meat yield and eating quality was designed and implemented. This project, ‘Regional Combinations’, was a multi-site experiment, using Bos taurus cattle generated at 4 locations across southern Australia. The design of imposing different growth paths between weaning and finishing on cattle with specific genetic potential is common across sites. Treatment and interaction effects on beef production and meat quality were examined within and across sites. This paper describes the experimental designs, generation of experimental cattle at the various sites and the measurements, collection and storage of the data for multi-site analyses.

scholarly journals The influence of the factor "genetic value of the sire" on the implementation of the genetic potential of the indicator "milk production of maximum lactation" of the Yaroslavl breed cows

2015 ◽  
Vol 31 (1) ◽  
pp. 145-151
Author(s):  
N.M. Kosyachenko ◽  
A.V. Konovalov ◽  
E.A. Nikolaeva ◽  
M.A. Malyukova ◽  
M.P. Petrovic ◽  
...  
Keyword(s):  
Milk Production ◽  
Generalized Linear Models ◽  
Phenotypic Variation ◽  
Dairy Products ◽  
Linear Models ◽  
Statistical Data ◽  
Cattle Breed ◽  
Main Food ◽  
Genetic Potential ◽  
Genetic Value

Dairy products are the main food elements of the man. Milk is the sole food for infants and it plays an important role in feeding of the sick, convalescent, and healthy adults. The Yaroslavl Region is a leading region of the Yaroslavl cattle breed. Therefore, the aim of our research was to determine the strength and reliability of the influence of the factor ?genetic value of the sire? on productive characteristics of animals as a factor that helps to increase the productivity of animals. When we determine the strength of the influence of factors for statistical data we used the procedure of generalized linear models (General Linear Models - GLM), and evaluation components of phenotypic variation attributes were analyzed by multivariate dispersive analysis. Our research has allowed to allocate bulls with genetic value which has the improving effect. Using the recommended lines the farmers of the Yaroslavl region may increase productive characteristics of animals and the profit of the farms and improve the efficiency of breeding.

scholarly journals RELATIONSHIP OF SKIN MEASUREMENTS AND MILK PRODUCTION LEVELS IN CATTLE BREEDS MAINTAINED IN THE TROPICS

2021 ◽  
Vol 4 (2) ◽  
pp. 92-95
Author(s):  
S. F. Amakiri
Keyword(s):  
Hair Follicle ◽  
Milk Production ◽  
Skin Thickness ◽  
Production Potential ◽  
Cattle Breeds ◽  
Positive Linear Correlation ◽  
The Tropics ◽  
Relationship Of ◽  
The Relationship ◽  
Selection Of

The relationship between mean skin thickness or hair follicle depth of the skin from the midside (12th rib) area and milk production levels of pure Friesian (Holstein)cattle breeds, their ¾ and 7/8 crosses with White Fulani zebu, and pure White Fulanis, maintained in South-Western Nigeria were studied. A strongly positive linear correlation (r = 0.9), significant at 1% level was found between skin thickness and hair follicle depth, and milk production levels in these breeds. The results indicate that for cows maintained in a hot humid tropical environment, comparative midside skin thickness and hair follicle depth could be used as indices of the milk production potential of cows. It could be a useful field tool for selection of cows for milk production when considered along with other characteristics

scholarly journals The relation between the crude fibre content of food and the milk production.

1955 ◽  
Vol 3 (1) ◽  
pp. 35-39
Author(s):  
P. Schoorl
Keyword(s):  
The Netherlands ◽  
Milk Production ◽  
Feeding Practices ◽  
Dry Season ◽  
Fibre Content ◽  
Crude Fibre ◽  
The Tropics ◽  
Crude Fibre Content

The Friesian cow in Indonesia gives about 1, 500 1. milk in about 240 days compared with 3, 800 1. in 300 days in the Netherlands. The author believes that the main reason for the low production in the tropics is not climate, but faulty feeding practices. A cow fed a typical Indonesian ration of reedy grass and fibrous concentrates gave 1, 003 1. milk in the first no days of her first lactation, but increased to 1, 870 1. in the first 102 days of her second lactation when given a diet containing much less crude fibre, in spite of the fact that the former lactation was in the wet and the latter in the dry season. G.F.S. (Abstract retrieved from CAB Abstracts by CABI’s permission)

State and prospects of the development of dairy cattle industry in the Stavropol territory

2021 ◽  
pp. 11-16
Author(s):  
N. V. Sulyga ◽  
G. P. Kovaleva ◽  
M. N. Lapina ◽  
V. A. Vitol
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
Objective Assessment ◽  
Short Term ◽  
State Support ◽  
Agricultural Producers ◽  
Cattle Industry ◽  
Genetic Potential ◽  
Dairy Cattle Breeding ◽  
Agricultural Organizations

This article presents the analysis of the state of dairy cattle industry and its short-term development prospects in connection with the crisis of 2020.  For the purposes of objective assessment, we considered the period of 2015-2019 and presented the dynamics of the main statistical indicators with significant state support (grants, subsidies, etc.) for agricultural producers. In 2019 the total amount of disbursed funds was more than 1.4 billion rubles, most of which were directed to the development of dairy cattle breeding. According to the results of 2019, 73.9% in milk-production structure accrue to personal subsidiary farms, 19.6% - to agricultural organizations and 6.5% - to private farms. The significant share of produced milk in the Stavropol territory accrues to personal subsidiary farms; at the same time, the increase in milk production was 26.5% (643.8 thousand tons). Alongside the reduction of livestock in the general population of milk cattle in the Stavropol territory it is obvious that the genetic potential of cows increases due to the decrease of low-productivity animals and wide-scale import of high-producing breeding heifers, both from abroad and domestic market. The topical problems of the industry are low reproductive qualities of cows (the output of calves in agricultural organizations is only 75%), the violations of feeding technologies and animals housing due to insufficient availability of specialists. In general, industry development rate is quite high and has significant potential for production increase in short-term prospect, provided that the existing state-support programs continue. The most relevant trends are the increase of genetic potential of productivity in Stavropol livestock population, the adoption of state-of-the-art technologies for livestock keeping and feeding, as well as the development of farming and the niche of organic products.

scholarly journals Genetic potential of milk productivity of black-and-white cows depending on selection and management

2020 ◽  
Vol 17 ◽  
pp. 00158
Author(s):  
Alexander Lyubimov ◽  
Ekaterina Martynova ◽  
Yulia Isupova ◽  
Ekaterina Yastrebova ◽  
Elena Achkasova
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
System Technology ◽  
Milk Productivity ◽  
Genetic Progress ◽  
Black And White ◽  
Traditional Technology ◽  
Genetic Potential ◽  
Livestock Productivity

Currently an increasing attention is paid to breeding animals ensuring the greatest genetic progress of populations in livestock productivity, i.e. stud bulls. Hence, the study of the realization degree of genetic potential of productivity of dairy cattle with different ecogenesis in the conditions of industrial and traditional technology of milk production seems quite relevant. The study revealed that the degree of realization of genetic potential of stud bulls in traditional (tied-up system) and industrial (cubicle system) technology is different.

scholarly journals Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows

2012 ◽  
Vol 57 (No. 3) ◽  
pp. 108-114 ◽  
Author(s):  
V. Zink ◽  
J. Lassen ◽  
M. Štípková
Keyword(s):  
Milk Production ◽  
Genetic Parameters ◽  
Selection Index ◽  
Female Fertility ◽  
Holstein Cows ◽  
Production Traits ◽  
Milk Production Traits ◽  
Clear Trend ◽  
Genetic Potential ◽  
Fertility Traits

The aim of this study was to estimate genetic parameters for female fertility and production traits in first-parity Czech Holstein cows and to quantify the effect of using this information on the accuracy of a selection index in seven different scenarios. In order to estimate genetic (co)variance components, the DMU software running an AI-REML algorithm was used. The analyses were made using a series of bivariate animal models. The pedigree included 164 125 animals and it was set up using a pruned animal model design. The present study included the following female fertility traits for the first lactations: calving to the first insemination (CF), days open (DO), calving from the first to the last insemination (FL), and milk production traits: milk production (MLK), kg of fat (FAT), and kg of protein (PROT). The heritability for all the investigated fertility traits was low and close to 0. Moderate heritabilities for production traits ranging from 0.20 (MLK) to 0.23 (PROT) were estimated. The strongest unfavourable correlation was found between PROT and DO (0.49). Other estimated correlations between fertility traits and production traits were moderate, ranging from 0.26 to 0.41. The results of this study evidence that cows with the poorest genetic potential for reproductive performance are those having high genetic potential for milk production and milk components. The results also show that the number of days from calving to new pregnancy depends on the production level. Seven investigated scenarios using selection index theory show a clear trend for increasing accuracy when more fertility traits were added as well as when higher numbers of daughters with information on reproduction traits per sire were available.  

Milk Production in the Tropics.

1990 ◽  
Vol 19 (4) ◽  
pp. 286-286
Author(s):  
A. H. Phipps
Keyword(s):  
Milk Production ◽  
The Tropics

4.1 Merits and demerits of importing exotic cattle compared with the improvement of local breeds: cattle in africa south of the sahara

1981 ◽  
Vol 4 ◽  
pp. 191-231
Author(s):  
J. C. M. Trail
Keyword(s):  
Milk Production ◽  
Indigenous Cattle ◽  
Major Constraint ◽  
Genetic Potential ◽  
Breeding Programmes

The limited genetic potential of indigenous cattle has often been quoted as a major constraint to beef and milk production in Africa south of the Sahara. Thus, considerable efforts have been and are being made to increase output through breeding programmes in many countries of the continent. These efforts include both the introduction of cattle from America, Asia and Europe for use in upgrading and crossbreeding schemes and maintenance as purebreds and the operation of selection programmes within indigenous cattle populations.

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