Most of the diversity resource of durian was reported existing in Central Tapanuli. Due to local durian potential, germplasm needed to obtain information on the potential for superior cultivars. Here, we report our identification of morphology characteristics to the genetic relationship of local durian to determine the best durian. This research applied exploration study, interviews, descriptive, and qualitative identification. Research data were grouped based on similarity values using cluster analysis. Results showed that each local durian from Central Tapanuli had similar morphological characters, especially in the vegetative phase. Characters that show distant genetic relationships are fruit length, fruit diameter and seed weight. Other characters that depict close genetic relationship were the color of the fruit stalks and thorns' presence in the fruit. Based on morphological characteristics, a dendrogram was drawn and formed into three clusters. The present study shows that 75 accessions of durian fruit detected in each location have a relatively close similarity distance. That similarity between durian accessions is influenced by interactions between genetic factors and the environment. This result can also be used for durian conservation aimed at collections as genetic resources to benefit durian breeding in expanding diversity.
Durio zibethinus Murr. (Malvaceae) is well known to produce secondary metabolites and has been described to contain several biological activities. The present study reports the bioinformatics approach to determine ten probably polyprenol reductase from durian (Durio zibethinus Murr.). The length of the gene was varied from 1313 to 1702 bp with protein length from 317 to 412 amino acid. Several physicochemical parameters of polyprenol reductase in D. zibethinus were varied among the genes observed. Based on stability coefficients, ten D. zibethinus genes were unstable proteins except for X5 variant. The genes were mostly stored in the plasma membrane, chloroplast thylakoid membrane, Golgi body, and endoplasmic reticulum (membrane). In contrast to this observation, a few genes existed to the microbody (peroxisome), mitochondrial inner membrane, and endoplasmic reticulum (lumen). To clarify the homology in the group of the polyprenol reductase gene in D. zibethinus, a dendrogram tree was constructed. A clustering showed that polyprenol reductase in D. zibethinus consisted of three branches. The present results indicated the prominence of understanding the disparity and function of physical and chemical features of the different amino acids in plant polyprenol reductase genes in D. zibethinus.
Durian is a plant that is prone to genetic erosion. Exploration and characterization must be carried out to protect the local durian germplasm in Tapanuli Tengah Regency. This study aims to characterize the morphology of durian plants and determine the genetic relationship between the accessions of local durians in Tapanuli Tengah Regency. The research was done at Tukka, Sitahuis, and Kolang districts from December 2018 to February 2019 with a survey method using durian descriptor of IPGRI. Sampling techniques using purposive sampling with location judgment and morphological observation data were processed using NTSYS-pc 2.02 software and genetic relationship using the IBM SPSS (Statistical Package for the Social Sciences) program version 2.02 with cluster analysis. The result of the research showed that in Tukka, Sitahuis and Kolang district there were 75 accessions of durian been identified. The closest relationship is obtained on A61 and G71 originating from Kolang District with a similarity value of 7,345. The furthest relationship was obtained from A1 and A25 from Tukka district with the similarity value of 94,097.
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