Determination of Kinship Among Orange Cultivars (Citrus Sp) Based on Flavonoid Profiles
Abstract
Orange (Citrus sp.) is a type of plant with a superior flavor and aroma of the fruit that satisfies many tastes in Indonesian society. As one of the exceptional fruit commodities, economically has economic advantages and vast marketing. Increase public awareness of the need for a source of nutrition and the benefits generated by the orange as having antioxidant activity, antibacterial, antiviral, hypo-allergenic, and anticancer, as well as industrial raw materials such as jam, juice, syrup, and dodorizer.To measure the kinship of orange species based on flavonoid content. Exploration carried out in a basic chemical laboratory, parameters measured were the flavonoids by using the wavelength of maximum absorption of the UV-Vis spectrophotometry of citrus flavonoids. Furthermore, profile flavonoids with UV-Vis spectrophotometry include absorption bands of the type of flavonoid. Data analysis and results of chemical constituents in the form of a binary data matrix. After that, proceed with the analysis SIMQUAL (Similarity of Qualitative Data) to obtain a similarity matrix between phenetic cultivars of orange. Fenetic similarity matrix, then clustering analysis method (Sequential Agglomerative Hierarchical and Nested), SAHN-UPGMA (Unweighted Pair-Group Method Arithmetic Average) program, NTSys-PC version 2.0, to construct phenetic family tree (dendrogram). The result showed that by using the UV-Vis spectrophotometry profile of flavonoids, a dendrogram is formed of two main clusters, namely cluster I, which consists of sweet orange cultivars, kisar grapefruit, sour orange, lemon, suanggi orange, and pomelo. Cluster II consists of limau orange and lime cultivars. Furthermore, flavonoid profiles using UV-Vis spectrophotometry indicate that kisar grapefruit and lemon tart have a coefficient of 0,88, which means close kinship with limau and lime, which have a coefficient of 0,88, meaning close kinship with cluster II. NaOH reagent 40%, AlCl35%, NH3 25% can produce color changes that indicate the presence of flavonoid content, while using distilled water does not. The kinship test consists of 2 clusters that have a difference of 0.52 (52%)
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