Detection of QTL controlling feed efficiency and excretion in chickens fed a wheat-based diet

Autor: Sandrine Mignon-Grasteau, Céline Chantry-Darmon, Marie Chabault, Marie-Yvonne Boscher, Elisabeth Le Bihan-Duval, Agnès Narcy, Nadine Sellier, Irène Gabriel, Nicole Rideau
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Genetic Linkage
[SDV]Life Sciences [q-bio]
Feces
Genetics(clinical)
Triticum
2. Zero hunger
CARCASS TRAITS
0303 health sciences
qtl
efficacité alimentaire
Proventriculus
04 agricultural and veterinary sciences
General Medicine
Poultry farming
BODY-WEIGHT
Adipose Tissue
GROWTH
GASTROINTESTINAL-TRACT
Research Article
Animal feed
CORRELATED RESPONSES
digestibilité
Quantitative Trait Loci
Quantitative trait locus
Biology
Feed conversion ratio
PARAMETERS
Excretion
03 medical and health sciences
Animal science
Dry weight
DIVERGENT DIGESTION EFFICIENCY
Genetics
Animals
nutrition animale
Gizzard
Ecology
Evolution
Behavior and Systematics
030304 developmental biology
RECEPTOR
business.industry
LAYER CROSS
Body Weight
0402 animal and dairy science
040201 dairy & animal science
Animal Feed
Biotechnology
Diet
Gastrointestinal Tract
QUANTITATIVE TRAIT LOCI
Animal Science and Zoology
business
Chickens
poulet de chair
efficacité digestive
Zdroj: Genetics Selection Evolution (47), 1-13. (2015)
Genetics, Selection, Evolution : GSE
Genetics Selection Evolution
Genetics Selection Evolution, 2015, 47 (1), pp.74. ⟨10.1186/s12711-015-0156-y⟩
ISSN: 1297-9686
Popis: Background Improving feed efficiency is a major goal in poultry production in order to reduce production costs, increase the possibility of using alternative feedstuffs and decrease the volume of manure. However, in spite of their economic and environmental impact, very few quantitative trait loci (QTL) have been reported on these traits. Thus, we undertook the detection of QTL on 820 meat-type chickens from a F2 cross between D− and D+ lines that were divergently selected on low or high digestive efficiency at 3 weeks of age. Birds were measured for growth between 0 and 23 days, feed intake and feed conversion ratio between 9 and 23 days, breast and abdominal fat yields at 23 days, and the anatomy of their digestive tract (density, relative weight and length of the duodenum, jejunum, ileum, and ratio of proventriculus to gizzard weight) was examined. To evaluate excretion traits, fresh and dry weight, water content, pH, nitrogen to phosphorus ratio from 0 to 23 days, and pH of gizzard and jejunum contents at 23 days were measured. A set of 3379 single nucleotide polymorphisms distributed on 28 Gallus gallus (GGA) autosomes, the Z chromosome and one unassigned linkage group was used for QTL detection. Results Using the QTLMap software developed for linkage analyses by interval mapping, we detected 16 QTL for feed intake, 13 for feed efficiency, 49 for anatomy-related traits, seven for growth, six for body composition and ten for excretion. Nine of these QTL were genome-wide significant (four for feed intake on GGA1, one for feed efficiency on GGA2, and four for anatomy on GGA1, 2, 3 and 4). GGA16, 19, and 26 carried many QTL for different types of traits that co-localize at the same position. Conclusions This study identified several QTL regions that are involved in the control of digestive efficiency in chicken. Further studies are needed to identify the genes that underlie these effects, and to validate these in other commercial populations and for different breeding environments. Electronic supplementary material The online version of this article (doi:10.1186/s12711-015-0156-y) contains supplementary material, which is available to authorized users.
Databáze: OpenAIRE
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