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- Title
Characterization of wheat - Secale africanum introgression lines reveals evolutionary aspects of chromosome 1R in rye.
- Authors
Meng-Ping Lei; Guang-Rong Li; Cheng Liu; Zu-Jun Yang
- Abstract
Wild Secale species, Secale africanum Stapf., serve as a valuable source for increasing the diversity of cultivated rye (Secale cereale L.) and provide novel genes for wheat improvement. New wheat - S. africanum chromosome lRafr addition, lRafr(lD) substitution, lBL.lRafrS and lDS.lRafrL translocation, and 1 RallL monotelocentric addition lines were identified by chromosome banding and in situ hybridization. Disease resistance screening revealed that chromosome lRafrS carries resistance gene(s) to new stripe rust races. Twenty-nine molecular markers were localized on S. africanum chromosome lRafl by the wheat - S. africanum introgression lines. Twenty markers can also identically amplify other reported wheat - S. cereale chromosome 1R derivative lines, indicating that there is high conservation between the wild and cultivated Secale chromosome 1R. Nine markers displayed polymorphic amplification between S. africanum and S. cereale chromosome lRafl derivatives. The comparison of the nucleotide sequences of these polymorphic markers suggested that gene duplication and sequence divergence may have occurred among Secale species during its evolution and domestication.
- Subjects
SECALE; GRASS growing; WHEAT genetics; CHROMOSOMES; CHROMOSOME duplication
- Publication
Genome, 2012, Vol 55, Issue 11, p765
- ISSN
0831-2796
- Publication type
Article
- DOI
10.1139/g2012-062