Sexing chick mRNA: A protocol based on quantitative real-time polymerase chain reaction

Area of Science:

• Avian biology
• Molecular genetics
• Biotechnology

Background:

• Accurate avian sex identification is crucial for understanding sex determination and differentiation.
• Current molecular sexing methods rely on genomic DNA and polymerase chain reaction (PCR).
• A need exists for alternative sexing protocols, especially for early developmental stages.

Purpose of the Study:

• To develop and validate the first messenger RNA (mRNA)-based protocol for molecular sexing of birds.
• To assess the efficacy of this new method using real-time quantitative PCR (qPCR).
• To determine if the protocol is applicable to various chick tissues and potentially other avian species.

Main Methods:

• Development of a novel sexing protocol utilizing chick mRNA.
• Application of real-time quantitative PCR (qPCR) for gene expression analysis.
• Testing the protocol on mRNA extracted from chick gonads and non-gonadal tissues (heart, liver, spleen, lung, muscle).

Main Results:

• The developed mRNA-based qPCR protocol accurately determined the sex of chicks.
• Successful sex identification was achieved using mRNA from both gonadal and non-gonadal tissues.
• The protocol demonstrated potential applicability to other avian species with similar sex chromosome systems (ZZ male, ZW female).

Conclusions:

• Messenger RNA (mRNA) serves as a viable alternative to genomic DNA for avian molecular sexing.
• The real-time quantitative PCR (qPCR) protocol offers an accurate and versatile method for sex identification in chicks.
• This approach may be adaptable for sexing various avian species, aiding research in avian genetics and development.