This chapter highlights the significance of natural fiber crops within the Asparagaceae family. With the earth’s population surpassing eight billion in 2022 and continuing to grow rapidly, there is a pressing need to boost agricultural productivity to meet the increasing demand for food and fiber all while minimizing ecological and environmental impacts. Given the current challenges posed by climate change, it is crucial to cultivate eco-friendly crops without compromising yield and quality. Sisal (Agave sisalana Perrine) stands out as a key natural fiber crop originating from Mexico and Central America offering great potential to bridge the gap between fiber demand and supply. However, existing sisal varieties suffer from low yield and fiber quality, prompting plant breeders to prioritize these traits. Additionally, climate change is also affecting the overall yield and fiber quality of Sisal. There is a dire need for time to address those threats being faced by the Sisal crop in order to sustain the future of Sisal as a potential fiber crop. Genetic variability serves as a fundamental prerequisite for successful breeding programs, with conventional now benefiting from advanced genomic tools like sequencing technologies and Marker-Assisted Selection (MAS) enabling targeted and trait-specific breeding efforts. Marker-Assisted Selection (MAS) is a modern breeding technique that utilizes molecular markers to aid in the selection of plants with specific traits. In the context of sisal breeding, MAS can significantly enhance the efficiency and precision of the breeding process. Researchers have identified DNA markers associated with traits of interest in sisal, including fiber quality, disease resistance, and stress tolerance. Breeding is a basic driver in agriculture to modify and improve crops for better yield and quality for the prosperity of humans.