China Animal Husbandry & Veterinary Medicine ›› 2025, Vol. 52 ›› Issue (9): 4237-4247.doi: 10.16431/j.cnki.1671-7236.2025.09.022

• Genetics and Breeding • Previous Articles    

Research Progress on Isothermal Amplification Technique in Sex Identification of Birds

TAN Shenluan1, ZENG Fanwen2, LI Li1, WEI Hengxi1, ZHANG Shouquan1   

  1. 1. National Engineering Research Center for Breeding Swine Industry, Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, China;
    2. Guangzhou Zoo/Guangzhou Wildlife Research Center, Guangzhou 510075, China
  • Received:2024-12-02 Published:2025-08-29

Abstract: Birds play a crucial role in both natural ecosystems and human societies,and the technology for identifying bird sex is vital for ecological research and the sustainable development of animal husbandry.Traditional sex identification methods,such as anal swelling,are generally limited by the experience and proficiency of the operators,and by low efficiency.In recent years,molecular sex identification technology,including PCR,molecular markers technology,and isothermal amplification technology have advanced rapidly. These applications have improved the accuracy and simplicity of sex identification in birds.Especially the introduction of isothermal amplification technology has accelerated the development of the sex identification technology and become a new tool in the sex identification of birds.Compared with PCR and molecular markers techniques,isothermal amplification has shown significant advantages in bird sex identification with its high efficiency,specificity and simple operation.Isothermal amplification technology can complete sample amplification and reach the detection level in 30 to 60 minutes at a single temperature.The authors reviewed the conventional methods of sex identification,using loop-mediated isothermal amplification (LAMP),recombinase polymerase amplification (RPA)/recombinase-aided polymerase amplification (PAA),and cross-priming amplification (CPA) in sex of birds as examples,illustrating the progress of the different isothermal amplification techniques in the sex identification of birds,and providing reference for future related research.

Key words: isothermal amplification; sex identification; LAMP; RPA/PAA; CPA

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