Animal Molecular Breeding, 2025, Vol.15, No.1, 1-8 http://animalscipublisher.com/index.php/amb 6 transfection systems, maximizing homology arm lengths, and exhaustive screening for off-target events (Bertolini et al., 2018; Wang et al., 2023). 6.2 Limitations in model construction and ethical supervision Even with the ease of how CRISPR/Cas9 has made it possible to generate gene-edited goats for both agricultural applications and biomedical investigation, constructing strong large-animal models is complex. Issues such as mosaicism, variable editing efficiency, and health issues in edited animals (e.g., MSTN knockout-induced abnormal growth or risk to health) highlight the need for strong model verification and prolonged observation (Guo et al., 2016). In addition, there needs to be ethical regulation, considering that gene editing livestock raises animal welfare, environmental impact, and food safety concerns demanding stringent regulatory frameworks (Lu et al., 2024). 6.3 Integration trends of high-throughput screening and single-cell editing technologies New directions in CRISPR research include the merging of high-throughput screening and single-cell editing technology. Such approaches enable systematic identification of functional genes and regulatory factors at scale, as well as cellular heterogeneity dissection in gene-edited populations. Such integration is expected to accelerate the discovery of adaptive genes and pathways, improve precision editing, and assist in developing more sophisticated breeding schemes (Kalds et al., 2019; Lu et al., 2024). 6.4 Strategic considerations for applying CRISPR to goat germplasm innovation and plateau breeding For breeding for adaptability to plateaus and germplasm innovation, CRISPR/Cas9 can potentially introduce or enhance favorable genes, such as enhanced muscle development, fiber quality, or disease resistance (Wang et al., 2016; He et al., 2018; Wang et al., 2018). Strategic implementation includes technical feasibility, stability of traits, and biosafety and ensuring the heritability of edited alleles and the absence of unintended effects (Wang et al., 2016; Wang et al., 2018; Wang et al., 2023). Continuous research, ethical management, and coordination with omics information will be necessary for effective and responsible application of CRISPR technology in goat breeding programs (Zhong et al., 2023).. 7 Concluding Remarks Recent genetic research has significantly enhanced understanding of plateau adaptation in goats. Genome-wide examinations have identified numerous genes and pathways, such as EPAS1, PAPSS2, LEPR, FGF2, and others, which are strongly associated with hypoxia response, cardiovascular development, and high-altitude energy metabolism. Introgression of wild species, such as the markhor, has also contributed adaptive alleles (e.g., PAPSS2) to Tibetan goats for enhancing survival under severe conditions. Functional studies and expression profiling have validated the physiological adaptation functions of these genes, though other candidate immune response and stress response genes have also been discovered. Even so, several research gaps and technical constraints still remain. For most candidate genes, functional verification is still in its infancy, and the molecular mechanisms underlying complex traits like hypoxia tolerance and immune adaptation are not yet well elucidated. Additional more comprehensive integration of multi-omics data (e.g., transcriptomics, metabolomics, epigenomics) is also needed to comprehensively reconstruct adaptive regulatory networks. Technical hurdles are improving the specificity and efficacy of the gene editing reagents, reducing off-target effects, and developing efficient large-animal models for functional analysis. The CRISPR technology possesses vast possibilities for accelerating innovation in plateau-adapted goat germplasm. By enabling precise editing of adaptive genes, CRISPR possesses the ability to facilitate the introduction or enhancement of traits such as tolerance to hypoxia, resistance to disease, and improved production traits. Future studies should focus on refining gene editing protocols through integrating high-throughput screening and single-cell technologies and following ethical and biosafety standards. Strategic application of CRISPR, supported by advanced genomic knowledge, will facilitate sustainable breeding and conservation of high-altitude adaptable goats.
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