| Genetic study of embryonic mortality in White Leghorn lines selected for egg production traits. | |
| | |
MedLine Citation:
|
PMID: 10579403 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The present study compares embryonic mortality between lines selected for different production traits, assesses the effects of inbreeding of the hen and embryo on embryonic mortality, and estimates genetic parameters of embryonic mortality. The experiment covered 10 generations of selection for increased egg number (EN), egg weight (EW), egg mass (EM) and a control line (C). The data included age at 1st egg, egg number and egg weight. Percent fertile eggs (PF), percent hatched of fertile eggs (PHF) and percent dead chick at hatch (PDH) were also recorded for the selected parents. PDH was higher in the selected lines than in the control line. Among the selected lines, the EW line had the highest embryonic mortality. Inbreeding of the hen and embryo had no significant effect on PDH in any of the lines. Estimates of heritability for PDH were 0.10+/-0.05, 0.02+/-0.02, 0.03+/-0.02 and 0.02+/-0.02 for lines EN, EW, EM and C, respectively. There was a positive genetic correlation between egg weight and PDH in line EW indicating that selection for increased egg weight was associated with high embryonic mortality. A negative genetic correlation between PDH and reproductive traits in line EN was observed, which is favourable. |
| | |
Authors:
|
A Sewalem; M Wilhelmson |
Related Documents
:
|
2642323 - Metabolic and cardiovascular changes during prolonged ritodrine infusion in fetal lambs. 6849123 - Vaginal stimulation: an important determinant of maternal bonding in sheep. 3770363 - Effect of transection and pacing on human jejunal pacesetter potentials. |
Publication Detail:
|
Type: Comparative Study; Journal Article |
Journal Detail:
|
Title: British poultry science Volume: 40 ISSN: 0007-1668 ISO Abbreviation: Br. Poult. Sci. Publication Date: 1999 Sep |
Date Detail:
|
Created Date: 1999-12-09 Completed Date: 1999-12-09 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 15740290R Medline TA: Br Poult Sci Country: ENGLAND |
Other Details:
|
Languages: eng Pagination: 467-71 Citation Subset: IM |
Affiliation:
|
Centre for Reproductive Biology, Swedish University of Agricultural Sciences, Uppsala. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Chick Embryo / physiology* Chickens / genetics* Crosses, Genetic Death Eggs / standards Female Fertility Inbreeding Oviposition Species Specificity |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Antioxidant systems of the avian embryo: tissue-specific accumulation and distribution of vitamin E ...
Next Document: Effects of drilling holes into the air cell of incubated goose eggs on distribution of oxygen partia...