The relationship between egg production, reproductive hormones, and the GDF9 gene in three different chicken strains

Q4 Biochemistry, Genetics and Molecular Biology Animal Gene Pub Date : 2023-03-01 DOI:10.1016/j.angen.2023.200147

W.S. Habashy , K. Adomako

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引用次数: 1

Abstract

Egg production is the most important commercial attribute of layer hens since it has a direct impact on the efficiency of the poultry industry. This research aimed to study the age at first egg (AFE), egg number (EN), egg quality, and some plasma hormones within the period from the start of laying eggs until day 90 of production in three strains of laying hens (Lohman Brown (LB), Golden Sabahia (GS)) and White Leghorn (WL) as the reference breed for egg production. In addition, a time series expression profile of growth differentiation factor 9 (GDF9) gene was investigated to get a better understanding of the genetic basis of egg production. The LB laying hens recorded the highest improved estimates of egg production and egg quality traits. Further, GDF9 was highly expressed in LB tissues (magnum and isthmus) compared to WL except in the uterus. These results suggest that there is a direct relationship between number of eggs produced, quality of eggs and the expression level of the GDF9 gene in the LB strains. Besides, the LB strain is superior with candidate productive traits, therefore they can be used as proven ancestors to improve laying hens.

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三个不同品系鸡产蛋量、生殖激素与GDF9基因的关系

鸡蛋生产是蛋鸡最重要的商业属性，因为它直接影响家禽业的效率。本研究旨在研究三个产蛋参考品种（Lohman Brown（LB）、Golden Sabahia（GS）和White Leghorn（WL）从产蛋开始到生产第90天期间的初蛋年龄（AFE）、蛋数（EN）、蛋质量和一些血浆激素。此外，还研究了生长分化因子9（GDF9）基因的时间序列表达谱，以更好地了解鸡蛋生产的遗传基础。LB蛋鸡在鸡蛋产量和鸡蛋质量性状方面的改进估计值最高。此外，除子宫外，与WL相比，GDF9在LB组织（大部和峡部）中高表达。这些结果表明，LB菌株中GDF9基因的表达水平与产蛋数量、蛋质量之间存在直接关系。此外，LB菌株具有优良的候选生产性状，因此它们可以作为改良蛋鸡的祖先。

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Animal Gene Agricultural and Biological Sciences-Insect Science

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期刊介绍： Gene Reports publishes papers that focus on the regulation, expression, function and evolution of genes in all biological contexts, including all prokaryotic and eukaryotic organisms, as well as viruses. Gene Reports strives to be a very diverse journal and topics in all fields will be considered for publication. Although not limited to the following, some general topics include: DNA Organization, Replication & Evolution -Focus on genomic DNA (chromosomal organization, comparative genomics, DNA replication, DNA repair, mobile DNA, mitochondrial DNA, chloroplast DNA). Expression & Function - Focus on functional RNAs (microRNAs, tRNAs, rRNAs, mRNA splicing, alternative polyadenylation) Regulation - Focus on processes that mediate gene-read out (epigenetics, chromatin, histone code, transcription, translation, protein degradation). Cell Signaling - Focus on mechanisms that control information flow into the nucleus to control gene expression (kinase and phosphatase pathways controlled by extra-cellular ligands, Wnt, Notch, TGFbeta/BMPs, FGFs, IGFs etc.) Profiling of gene expression and genetic variation - Focus on high throughput approaches (e.g., DeepSeq, ChIP-Seq, Affymetrix microarrays, proteomics) that define gene regulatory circuitry, molecular pathways and protein/protein networks. Genetics - Focus on development in model organisms (e.g., mouse, frog, fruit fly, worm), human genetic variation, population genetics, as well as agricultural and veterinary genetics. Molecular Pathology & Regenerative Medicine - Focus on the deregulation of molecular processes in human diseases and mechanisms supporting regeneration of tissues through pluripotent or multipotent stem cells.