Morphological and Molecular Characterization of Cocoyam (Colocasia esculentum and Xanthosoma sagittifolium) (L) Schott germplasm from Nigeria using Simple Sequence Repeat-SSR marker (Published)
Colocasia esculentum (L) Schott and Xanthosoma sagittifolium (L) Schott, commonly called cocoyam is one of the orphan crops with great potentials, but neglected by researchers and growers despite their high demands by consumers in recent times. Consequently, some of the local varieties have become almost extinct; this calls for the need to revive interest in these crops. This study was undertaken to characterize six cocoyam accessions collected from Cross River and Akwa Ibom States, Nigeria, using 13 qualitative and 6 quantitative Agro-morphological descriptors as well as simple sequence repeat (SSR) primers. The crops were laid out in a field using the Randomized Complete Block Design (RCBD) in 4 replications. Analysis of variance (ANOVA) test showed that the 6 accessions were not significantly different (P>0.05) in crop span, crop height, number of leaves, leaf width and leaf length. This indicates that these features cannot be used to distinguish between Colocasia and Xanthosoma spp. The qualitative traits were more useful in distinguishing between the two cocoyam species. Three of the primers used for molecular studies successfully amplified a few of the cocoyam accessions, indicating their suitability for genetic diversity studies in Colocasia esculenta and Xanthosoma spp.
Genetic resources supply the basic mechanics that allow plants to convert soil, water, and sunlight into something useful for human consumption. One of the most sustainable approaches for conserving precious genetic resources in the long run is to use plant genetic resources in crop development, followed by adoption, cultivation, and consumption or marketing of improved cultivars by farmers. This review’s goal is to describe the challenges surrounding the use of genetic resources in crop development. Crop genetic resources are the foundation of agricultural output, and their conservation and application have yielded major economic benefits. However, because crop genetic resources are essentially public assets, private incentives for conservation of genetic resources may fall short of meeting public goals. To effectively harness the existing resources in further valuable ways, a significantly greater characterization and knowledge of genetic diversity and its distribution is required. It’s critical to plan collecting excursions and conservation operations efficiently. The value of diversity lies in its application. The most basic method of conservation is to combine multiple ex situ and in situ conservation strategies in a complimentary manner. Biotechnology provides us with a new set of tools for studying genetic resources, as well as conservation measures. The utilization of distantly related trait carriers as donors for the desired traits has become more possible thanks to gene technology. Given the restricted national plant breeding capacity, international germplasm exchanges will continue to be vital in influencing new climatic and climate conditions.