Genetic variations for egg internal quality of ducks revealed by genome-wide association study
文献类型： 外文期刊
第一作者： Liu, Hehe
作者： Liu, Hehe;Zhou, Zhengkui;Hu, Jian;Guo, Zhanbao;Xu, Yaxi;Fan, Wenlei;Liang, Suyun;Liu, Dapeng;Zhang, Yunsheng;Xie, Ming;Tang, Jing;Huang, Wei;Zhang, Qi;Hou, Shuisheng;Liu, Hehe;Zhou, Zhengkui;Hu, Jian;Guo, Zhanbao;Xu, Yaxi;Fan, Wenlei;Liang, Suyun;Liu, Dapeng;Zhang, Yunsheng;Xie, Ming;Tang, Jing;Huang, Wei;Zhang, Qi;Hou, Shuisheng;Liu, Hehe;Li, Yanying;Wang, Lei
作者机构：
关键词： GWAS; Duck; egg quality; candidate genes
期刊名称：ANIMAL GENETICS （ 影响因子：2.841； 五年影响因子：2.438 ）
ISSN： 0268-9146
年卷期：
页码：
收录情况： SCI
摘要： 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 F-2 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 similar 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.
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