Genetic Improvement of Okra: Present Status and Bottlenecks
摘要
Okra (Abelmoschus esculentus L. Moench) is an economically important vegetable cropwidely cultivated across various regions for its nutritional value and versatile culinary applications. Efforts to incorporate desirable traits from wild relatives and landraces have broadened the okra gene pool in breeding programs, enabling the creation of robust and adaptable okra varieties. Progress in genomics has facilitated the identification of essential transcripts/genes, gene families, and genomic regions associated with traits, particularly resistance to biotic and abiotic stresses. The availability of chromosome-scale genome sequences has further accelerated the pace of genetic improvement in this crop. The utilization of DNA markers linked to target genes has expedited the process of identifying and selecting superior genotypes for specific traits, enabling breeders to develop improved varieties more efficiently. Marker-assisted selection (MAS) can be used to breed okra varieties resistant to devastating pathogens, such as begomo viruses. Transgenic approaches have shown promise in introducing novel genes responsible for traits like insect resistance, herbicide tolerance, and enhanced nutrient content. However, the acceptance and regulatory approval of genetically modified okra varieties remains controversial in several regions. As advancements in biotechnology continue to unfold, techniques such as genome editing hold immense potential in accelerating the development of tailored okra cultivars with precise modifications. Furthermore, integrating omics technologies, such as genomics, transcriptomics, and metabolomics, could shed light on complex gene-environment interactions, enabling breeders to optimize the expression of key genes and pathways related to desirable traits. However, continuous research and collaboration between scientists, breeders, and policymakers are essential to harness the full potential of genetic improvement in okra and address emerging challenges in agriculture and food security.