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Τετάρτη 7 Ιουνίου 2017

Whole Genome Resequencing Identifies the Molecular Genetic Cause for the Absence of a Gy5 Glycinin Protein in Soybean PI 603408

During ongoing proteomic analysis of the soybean (Glycine max (L.) Merr) germplasm collection, PI 603408 was identified as a landrace whose seeds lack accumulation of one of the major seed storage glycinin protein subunits. Whole genomic resequencing was used to identify a two-base deletion affecting glycinin 5. The newly discovered deletion was confirmed causative through immunological, genetic and proteomic analysis, and no significant differences in total seed protein content were found to be due to the glycinin 5 loss-of-function mutation per se. In addition to focused studies on this one specific glycinin subunit-encoding gene, a total of 1,858,185 nucleotide variants were identified, of which 39,344 were predicted to affect protein coding regions. In order to semi-automate analysis of a large number of soybean gene variants, a new SIFT 4G database was designed to predict the impact of non-synonymous single nucleotide soybean gene variants, potentially enabling more rapid analysis of soybean resequencing data in the future.



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