Nucleotide sequence organisation in the wheat genome

Abstract

Chromosomal nucleotide sequence organisation has been studied in hexaploid wheat, Triticum aestivum, using methods based upon the different renaturation kinetics of repeated and non-repeated sequences. Approximately 25 per cent of the wheat genome consists of non-repeated sequences. Nearly two-thirds of these (15 per cent of the genome) are around 1000 base pairs long interspersed between repeated sequences. Approximately 7 per cent of the genome consists of non-repeated sequences several thousand base pairs long. Less than 5 per cent of the genome consists of very much longer non-repeated sequences. Four per cent of the genome consists of extremely rapidly renaturing (foldback?) sequences. These sequences are distributed through at least 20 per Cent of the genome. © 1976 The Genetical Society of Great Britain. All rights reserved.