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Resequencing And Nucleotide Variation Of Sucrose Synthase Nmsusy1 Gene In A Tropical Timber Tree Neolamarckia Macrophylla

Journal: International Journal of Scientific & Technology Research (Vol.3, No. 7)

Publication Date:

Authors : ; ; ;

Page : 135-140

Keywords : Index Terms Neolamarckia macrophylla; red kelampayan resequencing; sucrose synthase SuSy single nucleotide polymorphism SNP; nucleotide variation; marker-assisted selection;

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Abstract Sucrose synthase SuSy is a key enzyme that catalyses the reversible synthesis and degradation of sucrose. It provides greater impact in regulating the photosynthetic processes and environmental stresses in plants. Thus the nucleotide variation of partial NmSusy1 genomic DNAs 750 bp generated through PCR amplification was examined in this study and this followed by resequencing from 15 selected Neolamarckia macrophylla clones. The consensus sequences were aligned to detect the presence of single nucleotide polymorphisms SNPs. In total five SNPs were detected at nucleotide 1 2 34 35 and 397. Of these four SNPs were located at the predicted coding region while one SNP was located at the predicted non-coding region. Interestingly one single base pair InDel polymorphism was also detected at nucleotide 17. On average one SNP at every 150 bp was detected based on the 15 NmSusy1 sequences. There was one non-synonymous mutation detected whereby amino acid glutamic acid E was replaced by arginine R in one of the 15 samples tested. This non-synonymous SNP might change the structural functional or biochemical properties of the enzyme being produced and therefore possibly lead to changes in phenotypic characteristic of the trees. Overall this study has demonstrated that resequencing is an effective technique for classifying molecular diversity or nucleotide variation in the Susy gene of N. macrophylla. Those SNPs once validated could potentially be used as a tool in marker-assisted selection MAS that enables more precise and accurate in the selection and prediction of yield or performance at the early developmental stages such as at the seedling stage.

Last modified: 2015-06-28 03:58:51