Document Detail

Selecting for efficiency of egg production using food-consumption records in layer-type chickens.
MedLine Citation:
PMID:  2049633     Owner:  NLM     Status:  MEDLINE    
1. The purpose of the experiment was to evaluate the use of food consumption records in selection to improve layer-type chickens. 2. Twelve subpopulations of Leghorns, including 5878 tested birds, were used in a selection experiment which lasted 5 generations. Four were selected using an index (I1) that combined information on body weight (BW), egg-mass output (EM), and individual food-consumption records (FC). Four were selected using an index (I2) that combined information just on BW and EM. The remaining 4 served as controls, with selection differentials set to zero in each generation. 3. Differences between the selected groups, control-corrected each generation, measured the "food-record effect". 4. Including food-consumption records in the selection criterion resulted in increased body weight (7%), reduction in food consumption (6 to 9%), increase in food efficiency (egg mass/food consumption) (2 to 5%), and increase in income over food costs (10%), relative to selection not involving food records.
A W Nordskog; Y H Hou; H Singh; S Cheng
Related Documents :
5910193 - Amniotic contraction and embryonic motility in the chick embryo.
18466953 - Concentrations and time trends of polybrominated diphenyl ethers (pbdes) and polychlori...
1795143 - How is the source of food poisoning outbreaks established? the example of three consecu...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  British poultry science     Volume:  32     ISSN:  0007-1668     ISO Abbreviation:  Br. Poult. Sci.     Publication Date:  1991 Mar 
Date Detail:
Created Date:  1991-07-22     Completed Date:  1991-07-22     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  15740290R     Medline TA:  Br Poult Sci     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  87-101     Citation Subset:  IM    
Department of Animal Science, Iowa State University, Ames 50011.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Chickens / genetics,  physiology*
Eating / genetics*
Models, Genetic
Oviposition / genetics*
Regression Analysis
Weight Gain / genetics

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Production of quail-chick chimaeras by blastoderm cell transfer.
Next Document:  Malignant melanoma in the 1990s: the continued importance of early detection and the role of physici...