Abstract:
:In combination with oligonucleotides of arbitrary sequence, 5' anchored oligonucleotides based on simple sequence repeats were used in polymerase chain reaction amplifications to produce barley DNA fingerprints. The aim of this work was (i) to develop a simple nonradioactive experimental procedure to reveal polymorphism in regions containing SSRs, (ii) to determine the genetic nature of polymorphisms, and (iii) to investigate the efficacy of polymorphisms contained in such fingerprints in disclosing genetic relationships between 14 European barley cultivars with known pedigrees. Different 10-mer oligonucleotides containing a dinucleotide motif were used as single primers and also in pairs with 10-mer oligonucleotides of arbitrary sequence. Further, the arbitrary oligonucleotides were used as single primers to produce RAPDs. Thirteen combinations of primers containing either GT(CA)4 or GC(CA)4 were selected on the basis of number and intensity of scorable bands in silver-stained 7% polyacrylamide gels. Of the fragments scored, 58.4% were polymorphic. Inheritance of these random amplified microsatellite polymorphic fragments (RAMP) was studied in doubled-haploid lines from the F1 of 'Steptoe' x 'Morex'. Fifty percent of the primers generated codominant markers. Genetic similarities between cultivars were estimated from RAMP and RAPD data. Principal coordinate analysis performed on RAMP data revealed a clear separation of winter six-rowed, winter two-rowed, and spring two-rowed barley. The dendograms generated faithfully reflected the genealogies of the barley cultivars. RAPD failed to show clearly the germplasm sources of the experimental cultivars.
journal_name
Genomejournal_title
Genomeauthors
Sánchez de la Hoz MP,Dávila JA,Loarce Y,Ferrer Edoi
10.1139/g96-015subject
Has Abstractpub_date
1996-02-01 00:00:00pages
112-7issue
1eissn
0831-2796issn
1480-3321journal_volume
39pub_type
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