alexa IMPACT OF MATERNAL EFFECTS ON RANKING OF ANIMAL MODELS


Open Access

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations

700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

Research Article

IMPACT OF MATERNAL EFFECTS ON RANKING OF ANIMAL MODELS IN GENETIC PARAMETER ESTIMATION FOR 18-MONTHS WEIGHT IN INDIGENOUS TULI CATTLE OF ZIMBABWE

Assan1, N. Masache2 A and Tambo3 G.
  1. Department of Agriculture, Faculty of Science, Zimbabwe Open University Bulawayo Region, Box 3550, Bulawayo, Zimbabwe
  2. Department of Applied Mathematics, Faculty of Applied Sciences, National University of Science and Technology, Box AC 939, Ascot. Bulawayo, Zimbabwe
  3. Matopos Research Station, Bag K 5137, Bulawayo, Zimbabwe
Received: 16 June 2012 Accepted: 25 September 2012
Related article at Pubmed, Scholar Google
 
To read the full article Peer-reviewed Article PDF image

Abstract

Maternal effects have been reported using different animal models for post weaning growth traits in some cattle breeds. Variance components for additive direct, additive maternal, permanent environmental maternal effects, the covariance between additive direct and maternal effects were estimated by restricted maximum likelihood, fitting five animal models from 2978 of 18 months (18MW) weight pedigree records of indigenous Tuli cattle of Zimbabwe. All investigated models included a random direct genetic effect, but different combinations of random maternal genetic and permanent environmental effects as well as for directmaternal genetic covariance. The direct heritability (h2 a) were constant (0.10) when the maternal genetic effects were included in the model, while (h2 a) estimates were higher (0.22) and (0.63) when maternal effects were excluded. The maternal heritability (h2 m) was (0.23) and higher than the direct heritability (0.10) when only maternal genetic effects were included in the model and did not change even when the permanent environmental effects of the dam was added. The permanent environmental effects of the dam was negligible and a strong positive correlation between direct and maternal genetic effects (σ2 am) was observed. The strong positive genetic correlation between direct and maternal genetic effects would not limit the effective utilization of both direct and maternal effects in selection for 18MW growth in indigenous Tuli cattle. A simple animal model with additive direct genetic effects as the only random effect would be appropriate for genetic evaluation of 18MW in indigenous Tuli cattle..

Keywords

Recommended Journals

Share This Page

Additional Info

Loading
Loading Please wait..
Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords