eChapters

Linear models have been extensively used in animal breeding. This chapter explains the basics of linear models including description; fixed, random and mixed models; model diagnostics and covariates. The concept of linear models in animal breeding is explained with representation and actual examples of use in different types of livestock.

Introduction to Linear Models

A model can be defined as a physical, mathematical or otherwise logical representation of a system, entity, phenomenon, or process. Linear models are a way of describing response variables in terms of a linear combination of the predictor variable. They provide a framework for a large set of models whose common goal is to explain or predict a quantitative dependent variable by a set of independent variables that can be categorical or quantitative.

Traits such as growth, lactation test day yield, semen evaluation are longitudinal traits measured repeatedly on the animal and random regression models (RRM) have been found to be suitable for modeling these traits, The methodology used, data requirement, assumptions, validity, software available and application of RRM are explained in this chapter.

Growth, test-day milk yield, and semen traits are examples of longitudinal traits measured repeatedly on the animal and random regression models (RRM) have been found suitable for modeling such traits. RRM is based on a covariance function which could be defined as “a continuous function to give the variance and covariance of traits measured at different points on a trajectory” (van der Werf, 2001). Kirkpatrick et al. (1990) showed that variance components for longitudinal data can be modelled through covariance functions. Random regression models (RRM) and the resulting covariance function have been recognized as ideally suited for the analysis of longitudinal data (Hill, 1998; Meyer, 1998).

Maintaining the required type of information in the form of records is primary for any type of animal breeding analysis and this chapter explains the importance of records and ways to maintain them in the form of registers or computer databases. The formats for different types of registers to be maintained are also given as a template in appendix. Any breeding plan is formulated to improve the economic traits depending on the utility of species reared and the chapter lists important economic traits of livestock and poultry with definitions and formulae, where ever required.

Basic record maintenance is a must for any animal breeding program. Every farm or breeding program is expected to maintain records in the form of registers or computerized databases. The goal of animal breeding is to select mates with the objective to improve economically important traits. In this chapter, the most common economic traits in different species of livestock are described. Even though the list is not exhaustive the basic economic traits that have been worked for improvement are explained. Breeders also explore new composite traits which are a combination of these base traits.

Meta-analyses has been used extensively to combine the results of existing studies and obtain powerful estimates of a parameter. In animal breeding, attempts have been made to obtain meta-analysis estimates for genetic parameters. This tool is more pertinent to animal breeding on account of heterogeneity in terms of location, sample size and other factors in the estimation of genetic parameters. This chapter explains the background, methodology, precautions and implications of meta-analysis with respect to genetic parameters.

A meta-analysis is a powerful tool of statistics that could combine several estimates from different studies for a parameter and the resulting weighted estimate could be used as a representative value for the particular parameter. However, not all the studies are similar with respect to location, sample size, and methodology used and thus various precautions are to be taken right from the selection of studies to incorporating of between-study heterogeneity in the models. In animal breeding, met-analysis is very much useful for obtaining meaningful estimates of genetic parameters and this chapter explains the methodology of meta-analysis in animal breeding.

This chapter describes various multivariate techniques which are useful in animal breeding. The genetic correlation with multiple response variables is already explained in the chapters on Correlation and Genetic Parameters. The other techniques including MANOVA, Principal Component Analysis, Factor Analysis, Cluster Analysis and Discriminant Analysis are explained.

Multivariate analysis is referred to a set of data with multiple response variables in general and such data is encountered often in animal breeding analysis. The simplest form of multivariate analysis is the genetic correlation where two or more traits are analysed together as response variables with factors affecting them on the right-hand side (RHS) and details of these are already explained in earlier chapters.

Animal breeding data is unique in terms of volume, statistical analysis, type of information required etc. The large volume of data extended spatially and temporally warrants additional tools in the form of databases to handle data and enable accuracy, retrieval, efficient utilization and adaptability to software. This chapter explains the nature of animal breeding data and the importance of databases with examples and explanations.

Animals are raised for some utility including meat, milk, hide, wool etc., and efforts are on to continuously improve the quality and quantity of these products. Some of the important economic traits in this regard were already discussed in earlier chapters. Record maintenance is primary for decision-making with respect to the selection of animals. The details of record maintenance including the format of registers are already explained in chapter 2. Apart from the actual information required for economic traits, pedigree information forms an important part of animal breeding data.

The number of people is expected to increase from 7.2 billion to 9.6 billion by 2050. (UN, 2013). This represents a 33% increase in population, but the demand for agricultural products will climb by approximately 70% during the same time period as the global quality of living rises (FAO, 2009). Livestock is essential for ensuring food security.

Current scenario of Startups in India

India, currently is being evolved as a hub for Revolution, innovation and Startups as it holds 3^rd rank in global startup ecosystem worldwide after US and China. The flagship initiative of Government, Startup India, is intended to construct arobust eco-system for fostering innovations and startups in the country. Through this initiative, the Government aims to empower the growth of startups through new innovations and strategies. As per the reports of Startup India, the startup sector is expected to mark steady annual growth of 12-15% (startupindia.gov.in). By the year 2018, India already had a list of about 50,000 startups. As per the data, more than 800 technology startups are being established every year (NASSCOM, 2015). The annual growth has increased to 15% and the number of female entrepreneurs has also increased to 14% (startupindia.gov.in). As of December 2021, the country is home to 81 unicorns which has a total estimate of $ 274.17 Bn. Out of these unicorns, 44 unicorns came into existence in 2021 itself, which was a record year for the country. These Figures show that startups have exploded in the country in recent years.

The aim of the breeder is to improve on various economic traits through selection. However, due to the lesser number of parents used, over a period of time, there creeps in the effect of inbreeding and loss of genetic variability which in turn causes depression and loss of fitness. This is more prominent in finite endangered populations and evaluation for genetic variability also forms an integral part of the animal breeding analysis.

Genetic variability is an integral part of domestic animal populations as fitness is directly related to the variability.

India is the fastest-growing pet care market in the world and the pet population is of an estimate of 28-29 million, with dogs making up the bulk of pet ownership. The rising pet ownership has led to the growth of the pet care ecosystem comprising retail chains, pet nutrition pharmaceuticals, grooming, toys, clothing, diagnostics, and clinical practice. The pandemic of Covid-19 has a significant impact on the Indian economy; and the pet industry has seen a steep growth during the pandemic period. Isolation and anxiety during the lockdown led to many restorations to adopt furry companions. The veterinary graduate has a lot of opportunities, and it depends upon the individual as to what sector the student wants to pursue. Employment opportunities include diverse areas such as clinical practice, teaching, and research, regulatory medicines, public health, wildlife specialist, or lab animals. Depending upon the interest, one can start exploring options to work for the pet industry and join the Veterinary pet practice clinical.

Introduction

Reproduction is the biological process that results in the formation of new progeny or individual organisms. Male and female gametes unite to form a zygote, which develops or produces offspring.

Integrated farming places a strong emphasis on the fundamental functions of agro-ecosystems, balanced nutrient cycles that are adapted to the demands of the crops, the health and wellbeing of the farm’s livestock, and a holistic management strategy that sees the entire farm as one connected system (Kochewad et al. 2017). Family farming, often referred to as integrated farming, provides the opportunity to profitably utilize the farm family’s available labor to the fullest extent throughout the year, leading to an increase in income and family contentment.

India is an agrarian country and the agriculture and allied sector is the largest employer of workforce as it accounted for a sizeable 18.8 per cent in 2021-22 in Gross Value Added (GVA) of the country (Economic Survey 2021-22).Agriculture is the primary source of livelihood for about 58% of India’s population and only the food processing industry employs about 1.77 million people (Indian Agriculture and Allied Industries Industry Report, November 2021). In the year 2019-20, gross value added by agriculture, forestry, and fishing was estimated at Rs. 19.48 lakh crore (US$ 276.37 billion). But still farming community has to face lot of hardships. The farmers are still applying chemical fertilizers on the basis of their own experiences as they don’t possess the soil heath cards. Although central government has initiated Soil Health Management (SHM) scheme to assist State Governments to set up new static Soil Testing Laboratories (STLs) and Mini Soil testing Labs (MSTLs). But it is time consuming and cumbersome process. There is great opportunity for Agri-business entrepreneurs with a commercially viable solution to farmers by development of simplified, sensor based and quick soil testing methods to test the nutrients and micronutrients.

Electricity is one of the fundamental phenomena of nature. Electricity or electric current is caused due to the movement of charged particles i.e., electrons. Due to the potential difference between two points in a conductor, electron movement takes place. The potential difference between two points is caused due to the difference in charge density. Electron tends to flow from lower potential to higher potential which causes electricity to flow. In general, the electrons flow from cathode (negative) to anode (positive) but in a wire electricity, electrons flow from anode to cathode when connected to a battery or any electricity source.

Introduction

The main function of the respiratory system is to exchange O₂ and CO₂ between the atmosphere, blood, and cells, which are necessary for animal survival. The circulatory and respiratory systems work together to provide oxygen to cells while eliminating CO₂. O₂ consumption and CO₂ production are determined by cell metabolic activity.

Respiratory volumes or lung volumes refer to the volumes of gas in the lungs at any given point during the respiratory cycle. These volumes vary according to the animals’ physiological state, ambient factors, and health status. This is why; measurements of lung volumes are helpful in understanding the pathophysiology of the respiratory system.

Agribusiness is a term used to describe the sector that encompasses all economic activities that are related to farming, i.e., breeding, crop production/farming, farm machinery, distribution, marketing etc. It relates to industries that are engaged in farming or that produce farm inputs. Examples of agribusiness include farm machinery manufacturing, seed supply, and agrichemicals. It also is used to describe businesses that are involved in the marketing and distribution of farm products. These businesses include warehouses, wholesalers, processors, retailers, and more. Any company that participates in the production, marketing, safety, and distribution of food is involved in agribusiness. More precisely it is defined as a sector that supports the growth of the agricultural industry, which is pivotal to economic growth. It also continues to play a crucial role in the growth of developing countries. Agribusinesses can potentially improve agricultural productivity, which is why governments often offer subsidies to agricultural businesses. Agricultural activities also contribute to an improved system of food security and sustainable food production, as well as income for a majority of the poor in developing countries. However, the activities increase the emission of greenhouse gases and contribute to global warming – which is why innovation is important in the sector to address such problems.

An entrepreneur is an individual who creates a new business, bearing most of the risks and enjoying most of the rewards. The process of setting up a business is known as entrepreneurship. The entrepreneur is commonly seen as an innovator, a source of new ideas, goods, services, and business/or procedures.

Entrepreneurship is an act of being an entrepreneur, or “the owner or manager of a business enterprise who, by risk and initiative, attempts to make profits”. Entrepreneurs act as managers and oversee the launch and growth of an enterprise. Entrepreneurship is the process by which either an individual or a team identifies a business opportunity and acquires and deploys the necessary resources required for its exploitation.

An entrepreneur uses their time, energy, and resources into creating value for others. They are rewarded for this effort monetarily and therefore both the consumer of the value created and the entrepreneur are benefitted.

The large volume, type and nature of animal breeding data and the complex nature of analytical requirement warrants additional tools for handling, storage, retrieval and solving complex equations. Accuracy, speed, computational requirement, applicability, etc., has resulted in the development of numerous software exclusive for animal breeding data analysis. The database management system is already explained in the chapter on ‘Nature of animal breeding data and database management’. This chapter gives a note on the commonly used animal breeding software.

Unemployment is a big challenge in every sector. In Jammu and Kashmir unemployment rate is 22.2 percent as per the Centre for Monitoring Indian Economy (CMIE) figures, and the rate is even higher than the National level unemployment rate of 7.1 percent recorded across India. Livestock sector plays an important role in rural livelihood, employment and income generation. There is a huge opportunity in this sector for developing start-up at their own and generation of employment. This is all possible if the skilled graduate of animal husbandry can be motivated for fostering new idea of startup which is market driven. Major livestock products like milk and milk products, meat and eggs contribute around one-sixth of the calories and one-third of the proteins in the per capita food supplies of the world. Animal husbandry is the second largest economic activity of rural India. Animal husbandry is a growth engine and annual growth rate in dairying is 5 % and in poultry it is 10% and will alleviate rural poverty and uplift the rural farmer. The availability of per capita animal protein is 10.8g whereas the requirement as per world average is 25g. National sample survey reports that 70-75% of their food budget is for milk and milk products. The need of the hour is increase in production, productivity and improvement through value addition in the marketing channel. Commercialization of cow dung and urine will also encourage people to not discard cows which have stopped milk production. By-products like urine and dung can be used for medicinal and agriculture purposes. It has been reported that startups would receive upto 60 per cent initial investment from Government for by-products like cow dung and urine. Eco friendly products can be prepared from dung and urine like Bio CNG, vermicompost, incense sticks, flowerpots, dung log etc.

Agronomical practices is the collection of operations starts from field formation, tillage, sowing, irrigation, manure and fertilizer management, pest control and harvest etc. Though, the type of agronomical practices varies with the crop, the basic function of various agronomical operations remains the same for all the crops. Considering that, understanding the basics of general agronomical practices is crucial for good agricultural practices and optimum production.

Tillage

Tillage is the basic activity of preparing the land for the crop production.