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Improvement in Egg Production Traits in the Light Local Chicken Ecotype Using a Selection Index

Improvement in Egg Production Traits in the Light Local Chicken Ecotype Using a Selection Index

Project / Seminar Material
Reference ID: PS-6362-TM

DEDICATION

This research material titled “Improvement in Egg Production Traits in the Light Local Chicken Ecotype Using a Selection Index” is dedicated to God for his enabling grace, and to all computer enthusiasts who contributed to make life a pleasant experience during my research documentation.

ACKNOWLEDGEMENT

I extend my sincere gratitude to all those who contributed to the completion of this project. Special thanks to my Supervisor (Name of your Supervisor), the Head of Department (Name of your HOD), the Lecturers in the department of Agricultural Engineering (AE), Book Authors and Profound Scholars of existing or related project material on “Improvement in Egg Production Traits in the Light Local Chicken Ecotype Using a Selection Index” for their invaluable guidance, support, and expertise throughout the journey.

I am also grateful to your study area (mention any funding organizations, if applicable) for their financial assistance. This research would not have been possible without the encouragement and assistance of some stakeholders (mention any mentors, teachers, or colleagues). Additionally, I would like to acknowledge the understanding and patience of my family and friends during this endeavor. Your unwavering support has been a constant source of motivation. Thank you all for being part of this meaningful endeavor.

ABSTRACT

Fifty hens and five cocks from a random mating population of light local chicken ecotype(LLCE) were mated and the fertile eggs hatched to obtain the parent generation (G0) used for this study aimed at improving egg production traits in the LLCE using a selection index. The hens were monitored for short-term (90-days from first day of lay) egg production traits namely: Body Weight at First Egg (BWFE), Average Egg Weight (AEW) and Total EggNumber (TEN). Data obtained were subjected to statistical analysis using SPSS (2001) and paternal half-sib model with Harvey (1990) to estimate descriptive statistics and genetic parameters respectively. These were employed in constructing the selection index. Selection For all the selection criteria (BWFE, AEW and TEN) was in the positive direction. Selected Parents were mated to produce next generations − G1 and G2. Selection differentials,selection intensities and genetic response due to selection were also estimated. A control population which spanned for three generations (each generation had its own control population) was used to monitor environmental changes and to estimate the genetic changes due to selection.

There were significant increases (P<0.05) in BWFE, AEW, and TEN in the selected populations over the three generations of study such significant increases (P<0.05)were not observed in the control population. Heritability estimates for all traits in all generations and populations were moderate to high. The heritability of the index was also moderate. Such moderate to high heritability estimates indicate high additive genetic variances, implying that these traits were most passed on from the parents to their offspring.Low to high positive genetic and phenotypic correlations was observed between BWFE andAEW in all populations of study.

The genetic correlation and phenotypic correlation between WIFE and EN, and between ARE and EN, was moderate to highly negative for all generations and populations of study. A positive genetic correlation was observed between NEW and TEN in G2 of the selected population. A cumulative selection differential of 269.38g, 1.58g and 3.88 eggs were obtained for BWFE, AEW and TEN respectively.Selection response for traits increased over the generations in a fairly linear manner.Realized response per generation was estimated to be 94.22g, 0.84g and 4.85eggs for BWFE,AEW and TEN respectively. It is evident that the simultaneous inclusion of BWFE, AEW,and TEN in a selection index generally improved the performance of selected birds over the generations in the Light Local Chicken Ecotype.


Improvement in Egg Production Traits in the Light Local Chicken Ecotype Using a Selection Index

CHAPTER ONE

1.1 Introduction

… As a prelude to other parts of this study, this chapter will discuss the background upon which this study was initiated, the statement of problems that led to this study, the Aim and Objectives of the study. Others are Significance of the study, Scope of work, Research hypothesis and questions, Limitation of the study and Definition of technical terms.

CHAPTER TWO

2.0 Literature Review

2.1 Introduction

This chapter focuses on the review of related literature. A literature review includes the current knowledge as well as theoretical and methodological contributions to a particular topic. It documents the state of the art with respect to the topic you are writing. It surveys the literature in the topic selected. In this research work the literature review includes the …

Summary Headlines for Improvement in Egg Production Traits in the Light Local Chicken Ecotype Using a Selection Index



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