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Abstract Detail


Evolution of Development and Physiology

Han, Yuepeng [1], Korban, Schuyler [2].

A novel family of miniature inverted-repeat transposable elements is associated with genes in apple.

The apple, Malus × domestica Borkh., belongs to the family Rosaceae and subfamily Maloideae, and has a genome size of ~750 Mb. Here, we report on a novel family of transposable elements, designated Spring, found in the apple genome. Four Spring elements, Spring-1 to Spring-4, share all classic features of miniature inverted-repeat transposable elements (MITEs), including small size (~148 bp), lack of coding potential, A/T richness, insertion bias toward noncoding regions, terminal inverted repeats (TIRs), target site duplications (TSDs), and potential for forming secondary structures. Previous mobility of Spring-4 is demonstrated by sequence alignment of genes encoding 1-aminocyclopropane-1-carboxylic acid (ACC) synthase from both apple and a related member of the Maloideae subfamily, pear. It is observed that Spring elements are flanked by either 7- or 8-bp direct repeats. In addition, these Spring elements in the apple genome significantly differ in size (2- or 3-bp) from those MITEs previously reported in various plant speices. In fact, the TIRs of these Spring elements have not been detected in any other previously reported genes or transposons.


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1 - University of Illinois, Department of Natural Resources and Environmental Sciences, 310 Madigan Lab, 1201 W. Gregory, Urbana, Illinois, 61801, USA
2 - University of Illinois, Department of Natural Resources and Environmental Sciences

Keywords:
transposable elements
MITEs
Spring elements.

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P27014
Abstract ID:1913


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