Genetic variations for egg internal quality of ducks revealed by genome-wide association study.
Anim Genet
; 52(4): 536-541, 2021 Aug.
Article
en En
| MEDLINE
| ID: mdl-34013574
ABSTRACT
Egg internal quality traits are important traits related to egg production in poultry industry. To better understand the genetic architecture of egg internal quality traits in ducks, we performed genetic parameters estimates and a genome-wide association study (GWAS). The phenotypic values of egg weight, yolk color, albumin height (AH), yolk weight, and Haugh unit (HU) were collected individually from 352 F2 laying ducks produced by reciprocal crosses between mallards and Pekin ducks, and their genotypes were assayed by whole genome re-sequencing. The results showed that the AH and HU traits have a clear coefficient of variance, around 15% for both mallards and Pekin ducks. The pedigree-based genetic parameters estimates rane from 0.26 to 0.71 for all eight egg quality traits, while the highest heritability was 0.71 for egg weight. The GWAS showed that a clear signal was associated with AH and HU traits. The locus zoom analysis and conditional GWAS helped to narrow the candidate region to ~5.8-Mb spanning from 14.7 to 20.5 Mb on Chromosome 5, which harbored 111 candidate genes. MUC6 and LDLRAD3 were finally promised as the major candidate genes affecting albumen composition. Our data revealed the egg internal quality traits for the first time in ducks, which provides a theoretical basis and technological support for improving duck egg internal quality.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Óvulo
/
Variación Genética
/
Patos
/
Estudio de Asociación del Genoma Completo
Tipo de estudio:
Risk_factors_studies
Límite:
Animals
Idioma:
En
Revista:
Anim Genet
Asunto de la revista:
GENETICA
/
MEDICINA VETERINARIA
Año:
2021
Tipo del documento:
Article
País de afiliación:
China