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  • Title: Cloning of expansin genes in ramie (Boehmeria nivea L.) based on universal fast walking.
    Author: Chen J, Dai L, Wang B, Liu L, Peng D.
    Journal: Gene; 2015 Sep 10; 569(1):27-33. PubMed ID: 25481635.
    Abstract:
    Gene cloning is the first step to study the expression profiles and functions of a particular gene; considerable cloning methods have been developed. Expansin, thought to involve in the cell-wall modification events, was not cloned in ramie (Boehmeria nivea L.), which is one of the most important bast fiber crops with little conducted molecular research, especially on its fiber development. Studying the expansin gene family will uncover its possible relationship with ramie fiber development and other growth events. As a result, five expansin genes were cloned with full-length and their sequence information was investigated. Additionally, the phylogenetic analysis was conducted, which suggested that the cloned genes belong to the α-subfamily, and these genes expressed differently during ramie fiber developmental process. In this study, we aimed to apply a strategy for cloning novel full-length genes from genomic DNA of ramie, based on using degenerate primers, touchdown polymerase chain reaction and universal fast walking protocols. By cloning five full-length expansin genes, we believe the polymerase chain reaction-based gene cloning strategy could be applied to general gene studies in ramie and other crops.
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