• Home
  • Browse
    • Current Issue
    • By Issue
    • By Author
    • By Subject
    • Author Index
    • Keyword Index
  • Journal Info
    • About Journal
    • Aims and Scope
    • Editorial Board
    • Publication Ethics
    • Peer Review Process
  • Guide for Authors
  • Submit Manuscript
  • Contact Us
 
  • Login
  • Register
Home Articles List Article Information
  • Save Records
  • |
  • Printable Version
  • |
  • Recommend
  • |
  • How to cite Export to
    RIS EndNote BibTeX APA MLA Harvard Vancouver
  • |
  • Share Share
    CiteULike Mendeley Facebook Google LinkedIn Twitter
Journal of Animal and Poultry Production
arrow Articles in Press
arrow Current Issue
Journal Archive
Volume Volume 16 (2025)
Volume Volume 15 (2024)
Volume Volume 14 (2023)
Volume Volume 13 (2022)
Volume Volume 12 (2021)
Volume Volume 11 (2020)
Volume Volume 10 (2019)
Volume Volume 9 (2018)
Volume Volume 8 (2017)
Volume Volume 7 (2016)
Issue Issue 12
Issue Issue 11
Issue Issue 10
Issue Issue 9
Issue Issue 8
Issue Issue 7
Issue Issue 6
Issue Issue 5
Issue Issue 4
Issue Issue 3
Issue Issue 2
Issue Issue 1
Volume Volume 6 (2015)
Volume Volume 5 (2014)
Volume Volume 4 (2013)
Volume Volume 3 (2012)
Volume Volume 2 (2011)
Volume Volume 1 (2010)
Volume Volume 34 (2009)
Volume Volume 33 (2008)
Volume Volume 32 (2007)
Volume Volume 31 (2006)
Volume Volume 30 (2005)
Volume Volume 29 (2004)
Volume Volume 28 (2003)
Volume Volume 27 (2002)
Volume Volume 26 (2001)
Volume Volume 25 (2000)
El-Wakil, S. (2016). RELATIONSHIPS AMONG SOME GROWTH PERFORMANCE TRAITS AND LIFETIME PRODUCTIVITY OF BARKI EWES. Journal of Animal and Poultry Production, 7(1), 39-45. doi: 10.21608/jappmu.2016.48267
Salwa I. El-Wakil. "RELATIONSHIPS AMONG SOME GROWTH PERFORMANCE TRAITS AND LIFETIME PRODUCTIVITY OF BARKI EWES". Journal of Animal and Poultry Production, 7, 1, 2016, 39-45. doi: 10.21608/jappmu.2016.48267
El-Wakil, S. (2016). 'RELATIONSHIPS AMONG SOME GROWTH PERFORMANCE TRAITS AND LIFETIME PRODUCTIVITY OF BARKI EWES', Journal of Animal and Poultry Production, 7(1), pp. 39-45. doi: 10.21608/jappmu.2016.48267
El-Wakil, S. RELATIONSHIPS AMONG SOME GROWTH PERFORMANCE TRAITS AND LIFETIME PRODUCTIVITY OF BARKI EWES. Journal of Animal and Poultry Production, 2016; 7(1): 39-45. doi: 10.21608/jappmu.2016.48267

RELATIONSHIPS AMONG SOME GROWTH PERFORMANCE TRAITS AND LIFETIME PRODUCTIVITY OF BARKI EWES

Article 5, Volume 7, Issue 1, January 2016, Page 39-45  XML PDF (381.45 K)
Document Type: Original Article
DOI: 10.21608/jappmu.2016.48267
View on SCiNiTO View on SCiNiTO
Author
Salwa I. El-Wakil email
Animal and Poultry Breeding Dept., Desert Research Centre, El-Matareya, Cairo, Egypt.
Abstract
The present study was conducted to characterize lifetime performance of Barki ewes, estimating some genetic and phenotypic parameters for total lifetime performance traits and investigate the possibility of improving these traits. Lifetime performance records for 1040 Barki ewes daughters of 194 sires and 729 dams were obtained from 1963 to 2010 from the sheep flock of the Desert Research Centre and used in the present study. Data was analyzed using SAS and MTDFREML programs to carry out analysis of variance and estimate genetic and phenotypic parameters for the studied traits. The current study dealt with lifespan, productive, reproductive and partial lifetime productive traits. Lifespan traits included total lifetime, TLT, productive life, PL and lifetime score. Lifetime productive traits included total number and weight of lambs born and weaned. Lifetime reproductive traits included age at first lambing, AgFL, and lambing interval, LI. Three partial life time productive traits were calculated i.e., after the first lambing, cumulative first two lambing, and cumulative three lambing.
Results showed that throughout the lifetime, Barki ewe on the average gave birth to 2.77 lambs weighing 9.74 kg at birth and able to rear 2.53 weaned lambs weighing 49.01 kg at weaning. Barki ewes showed an average TLT of 2301.63 days (i.e., 6.3 years), during which she has 2.71 lambing season. PL represented 37.8% of TLT of the ewe while AgFL, accounted for 39% of TLT. Average LI, was 344.44 days. The present study emphasized on improving reproductive efficiency of Barki ewes in this flock rather than removing non- lambing ewes. Birth year had highly significant effect on all studied traits. Heritabilities were estimated for lifetime productive traits (ranged from 0.24 to 0.31), lifespan traits (ranged from 0.07 to 0.16) and lifetime reproductive traits (ranged from 0.03 to 0.12). Highly significant and positive genetic and phenotypic correlations were obtained between lifetime productive traits and lifespan traits. The partial trait of weight of lambs weaned for the first three lambing was found to be moderately heritable and highly significant positively associated genetically and phenotypically with the total weight of lamb weaned (TWLW) which recommend the utility of this trait as an indirect selection criterion to improve the TWLW throughout the lifetime. Selection based on total weight of lambs weaned after the first lambing is likely to achieve the target at an earlier stage.
Keywords
Barki sheep; Genetic and phenotypic parameters; Ewe productivity; Lifetime performance traits
Statistics
Article View: 155
PDF Download: 411
Home | Glossary | News | Aims and Scope | Sitemap
Top Top

Journal Management System. Designed by NotionWave.