Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (1): 246-258.doi: 10.11843/j.issn.0366-6964.2025.01.023

• Animal Biotechnology and Reproduction • Previous Articles     Next Articles

Microamplification System Evaluation of Bovine Biopsied Embryo Cells

NIU Yifan1,2(), LI Chongyang1, ZHANG Peipei1, ZHANG Hang1, FENG Xiaoyi1, YU Zhou1, CAO Jianhua1, DU Weihua1, WAN Pengcheng3, MA Youji2,*(), ZHAO Xueming1,*()   

  1. 1. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
    2. College of Animal Science and Technology of Gansu Agricultural University, Lanzhou 730070, China
    3. Institute of Animal Husbandry and Veterinary, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi 832000, China
  • Received:2024-07-02 Online:2025-01-23 Published:2025-01-18
  • Contact: MA Youji, ZHAO Xueming E-mail:nyf.niuyifan@qq.com;yjma@gsau.edu.cn;zhaoxueming@caas.cn

Abstract:

The purpose of this study was to evaluate the amplification efficiency of different single cell whole genome amplification systems for different numbers of embryonic cells by second generation sequencing technology. In this study, healthy Huaxi cows under the same feeding and management conditions were selected as donors, and the 7th day embryos were collected after superovulation by FSH method. Samples containing 1C(cell), 5C and 10C embryos were obtained by biopsy technique for whole genome amplification, and then the amplification efficiency of single cell genome amplification system was evaluated by whole genome resequencing techniques. The results showed that the amplification success rate of multiple displacement amplification (MDA) system was better than that of the multiple annealing and looping-based amplification cycles (MALBAC) system in 1C and 5C samples (100% vs. 60%, 100% vs. 80%, P < 0.05). In addition, the total amount of amplification products of MDA system was significantly higher than that of MALBAC system (P < 0.01). Based on the sequencing analysis index: correct mapping rate, dup rate, typing consistency rate, allele drop-out rate and false positive rate, etc., MALBAC system was better than MDA system. The typing consistency rate of full-sib samples was higher than that of half-sib samples, but there were great differences between different full-sib and half-sib embryo samples. To sum up, MDA and MALBAC systems have their own characteristics, and the combination of their advantages may be a way to improve amplification efficiency. This study provides a theoretical basis for the whole genome selection of early bovine embryos and promoting the development of bovine breeding.

Key words: Huaxi cattle, embryo biopsy, amplification system, effect comparison

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