Evaluation of Production Traits in Two Strains of Layer Chickens under Relaxed Selection

Description

– Evaluation of Production Traits in Two Strains of Layer Chickens under Relaxed Selection –

Download Evaluation of Production Traits in Two Strains of Layer Chickens under Relaxed Selection. Animal Science students who are writing their projects can get this material to aid their research work.

Abstract

This study was conducted to determine strain differences on some production and egg quality traits in 200 birds of synthesized Grand Parent Stock (Male and female lines) under relaxed selection. The hens used were from the same hatch and under the same management practices.

Production traits studied were age at sexual  maturity  (ASM), body weight at 18 and 20 weeks of age (BW18 and BW20), egg number (EN), average egg weight (AEW), and rate of lay (RL).

Egg weight (Ewt), egg length (El), egg width (Ewdt), albumen weight (Albwt), yolk weight (Ywt), shell weight (Swt) albumen height (Albht), yolk height (Yht), shell thickness (Sth) were measured.

Haugh’s unit (HU) and shell index (SI) were also obtained for egg quality traits. Significant differences (P <  0.05) were obtained for ASM, AEW and BW20 between strains. Male line had higher mean values in ASM (161.50 days) and AEW (43.66g) but Female line had better mean value for ASM (158.79days).

For egg quality traits, significant (P < 0.05) differences  were also observed in Ewt, El, Ywt, Swt and HU. Higher mean values were obtained for all traits (Ewt, El, Ywt, and Swt) with the exception of HU in the Female line than the Male line.

Introduction

The goal of breeders is to improve the performance of their  flock.  One  of the major tools available for this improvement is selection. Selection is the act of choosing those individuals that will become parents of the next generation with the aim  of  improving  the performance of the flock or population.

The  various selection methods used  based  on phenotypic measurement includes: mass selection, progeny testing, tandem selection, independent culling level, and selection index (Bourdon, 2000). Genetic improvement in animals and plants  for  food  consumption has  been practised and realised since domestication.

Intensive  improvement,  increasingly  with incorporation of genetic principles, has been undertaken for a century or more (Hill, 2008). Much of this has been highly intensive and  effective,  notably in poultry.  There are consequently concerns that genetic variation is being exhausted and continued gains cannot be expected (Hill, 2008).

The genetics of a metric character centres round the  study of its variation (Falconer and Mackay, 1996). It is assumed that genetic variances either remains constant during selection or that any changes in variance can be predicted solely from the variance components of the base population.

How to Download this Project Material

First, note that we are one of the best and most reliable online platforms because we don’t retain any of your personal information or data as regards making payments online.

PRICE: ₦3,500 ₦3,000  (Three Thousand Naira Only)

Make a bank deposit or mobile transfer of ₦2,000 only to the account given below;

---

Bank Name: UBA Account Number: 1022564031 Account Name: TMLT PRO SERVICES

---

After making the payment, CLICK HERE to send the following on WhatsApp;

• Depositor’s Name or Screenshot of Payment
• Name of the Past Question
• Active Email Address

---

or Call Us On +2348082284439 Once your details have been received and your payment confirmed by us, you will receive the past question in your email or WhatsApp within 5 Minutes.

Guarantee of Getting the Material 

We understand that due to the high rate of fraud, many people are afraid of making purchases online but be rest assured that PastExamQuestions will deliver your material after payment.

Once your details have been received and your payment confirmed by us, you will receive the past question in your email or WhatsApp.

Give us Feedback

Have we been able to satisfy you? How well do you think the material will be helpful after having gone through it? Does the price worth the material?

Let’s hear from you! We recommend that our customers give feedback at the end of every transaction to enable us to serve better. You can do this by clicking the review button on this page.

Where is the review button? >> Just scroll up to where you see reviews