Role of SNPs located in the exon 9 of ATAPA1 gene on goose egg production

The meat and egg of goose is one of the main components of human food supply. The improve-ment of goose egg production is particularly important for the increasing human population. However, limited information is available about the effective molecular markers and mechanisms of egg production in goose. In this study, we jointly utilized the data of genome rese-quencing in different egg production Sichuan white goose and transcriptome at different follicle develop-ment stages to identified the molecular markers and mechanisms of egg production. The coefficient of varia-tion of individual egg production in Sichuan white goose population is 0.42 to 0.49. Fifty individuals with the highest (laying 365 days egg number, LEN365 = 79 - 145) and 50 individuals with the lowest (LEN365 = 8 - 48) egg production were divided into high and low egg production groups. Based on whole-genome sequencing data of the selected samples, 36 SNPs (annotation novel.12.470, CELF2, ATP1A1, KCNJ6, RAB4A, UST, REV3L, DHX15, CAVN2, SLC5A9, Cldn5, MRPS23, and Tspan2) associated with the LEN365 were identified, involving multiple pathways such as metabolism and endocrinology. Notably, 5 SNPs located in the exon9 of ATP1A1 were identified by GWAS anal-ysis. The association analysis with LEN365 showed the phenotypic variance explained of this haplotype consist-ing of 5 SNPs is 20.51%. Through transcriptome data analysis, we found the expression of ATP1A1 in the granular layers was increased in the stage of small yellow follicle to large yellow follicle (LYF) and LYF to F5, while decreased in F2 to F1. For the first time, we report the haplotype region formed by 5 SNPS on exon9 of ATP1A1 is associated with egg production in goose and involved in follicle selection and maturation processes.

Automated summary

This study identifies molecular markers and mechanisms related to egg production in geese, specifically highlighting the role of the ATP1A1 gene in follicle selection and maturation processes.