Divergent selection for growth in Japanese quail under split and complete nutritional environments. 5. Feed intake and efficiency patterns following nineteen generations of selection.

dc.contributor.author	Marks, HL	en
dc.date.accessioned	2014-06-06T06:41:57Z
dc.date.available	2014-06-06T06:41:57Z
dc.date.issued	1991	en
dc.identifier.issn	00325791	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/350
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0026165661&partnerID=40&md5=17cdf697cf316f176052f9b2acc57a27	en
dc.subject.other	abdomen	en
dc.subject.other	adipose tissue	en
dc.subject.other	animal	en
dc.subject.other	article	en
dc.subject.other	body weight	en
dc.subject.other	breeding	en
dc.subject.other	caloric intake	en
dc.subject.other	comparative study	en
dc.subject.other	Coturnix	en
dc.subject.other	diet	en
dc.subject.other	eating	en
dc.subject.other	female	en
dc.subject.other	genetics	en
dc.subject.other	growth, development and aging	en
dc.subject.other	male	en
dc.subject.other	protein intake	en
dc.subject.other	regression analysis	en
dc.subject.other	sexual development	en
dc.subject.other	Abdomen	en
dc.subject.other	Adipose Tissue	en
dc.subject.other	Animal	en
dc.subject.other	Body Weight	en
dc.subject.other	Breeding	en
dc.subject.other	Comparative Study	en
dc.subject.other	Coturnix	en
dc.subject.other	Diet	en
dc.subject.other	Dietary Proteins	en
dc.subject.other	Eating	en
dc.subject.other	Energy Intake	en
dc.subject.other	Female	en
dc.subject.other	Male	en
dc.subject.other	Regression Analysis	en
dc.subject.other	Sex Characteristics	en
dc.title	Divergent selection for growth in Japanese quail under split and complete nutritional environments. 5. Feed intake and efficiency patterns following nineteen generations of selection.	en
heal.type	journalArticle	en
heal.publicationDate	1991	en
heal.abstract	High (H) and low (L) quail lines divergently selected for 4-wk BW under complete-diet (CD) and split-diet (SD) environments were evaluated to examine changes in feed intake and feed efficiency before and after the age at selection. Progeny from the four quail lines (H-SD, L-SD, H-CD, L-CD) were fed the CD in Generation 17 and the SD in Generation 19. The BW of H-line quail were highest under their respective selection environments, and the BW of quail in the L lines were highest under reciprocal environments. However, the BW of the two H lines were similar as were those of the two L lines. Relative growth rates of H-line quail were superior to those of L-line quail for the first 2 wk posthatch but L-line rates were superior after Week 4. However, the BW of H-line birds were always higher than for the L-line birds. Adjusted feed intake (grams of feed per 100 g of BW) values for the H lines were similar but lower than values for the L lines. Differences in adjusted feed intake between the H and L lines from 1 to 10 wk remained constant, although adjusted feed intake declined with age in all lines. Feed efficiencies (grams of gain divided by grams of feed) were superior in the H lines for Weeks 1 through 3 and superior in the L lines for Weeks 5 through 9. The same relative shifts between lines were observed in relative growth rates. Therefore, feed efficiency, in addition to feed intake, appears to play an important role in the divergence of BW in the H- and L-quail lines.	en
heal.journalName	Poultry science	en
dc.identifier.issue	5	en
dc.identifier.volume	70	en
dc.identifier.spage	1047	en
dc.identifier.epage	1056	en