Genetic variation among Portuguese landraces of 'Arrancada' wheat and Triticum petropavlovskyi by AFLP-based assessment

Portuguese wheat landraces, 'Arrancada' were collected from the Aveiro region, Portugal before the 1950s. We found in eight accessions of `Arrancada' hexaploid wheat with the long glume phenotype. We assessed the comparative genetic diversity among Portuguese `Arrancada' wheat an...

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Bibliographic Details
Published in:Genetic resources and crop evolution 2005-08, Vol.52 (5), p.619-628
Main Authors: Masum Akond, A.S.M.G, Watanabe, N
Format: Article
Language:English
Subjects:
Amplified fragment length polymorphism
Clustering
Genetic diversity
genetic variation
germplasm
glumes
hexaploidy
inflorescences
introgression
landraces
Loci
Markers
Mutation
phenotype
Phenotypes
phylogeny
plant breeding
provenance
tetraploidy
Triticum
Triticum aestivum
Triticum petropavlovskyi
Triticum turgidum
Triticum turgidum ssp. polonicum
Wheat
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Summary:Portuguese wheat landraces, 'Arrancada' were collected from the Aveiro region, Portugal before the 1950s. We found in eight accessions of `Arrancada' hexaploid wheat with the long glume phenotype. We assessed the comparative genetic diversity among Portuguese `Arrancada' wheat and Triticum petropavlovskyi Udacz. et Migusch. using AFLP assays and discuss the origin of long glumed `Arrancada' wheat. With the four primer pairs a total of 4885 visible bands were scored corresponding to 99 AFLP markers as putative loci, of which 55 markers (54%) were polymorphic. UPGMA clustering and PCO grouping showed that long glumed 'Arrancada' wheat and T. petropavlovskyi were genetically diverse. Long glumed 'Arrancada' hexaploid wheat separated into two clusters (groups) in both the UPGMA dendrogram and in PCO analysis. Four long glumed accessions fell in the cluster of tetraploid wheat. A similar argument could be made for another four accessions which belong to the cluster of hexaploid wheat. The substantial level of genetic variation indicated that long glumed 'Arrancada' wheat and T. petropavlovskyi originated independently. It is most likely that the P-gene of long glumed 'Arrancada' hexaploid wheat was introduced from T. turgidum ssp. polonicum (L.) Thell. to T. aestivum via natural introgression or breeding. We suggest that the long glumed 'Arrancada' hexaploid wheat did not originate from T. aestivum through spontaneous mutation at the P locus
ISSN:0925-9864
1573-5109
DOI:10.1007/s10722-005-6843-8