Analysis of Specific RAPD and ISSR Fragments in Maize (Zea mays L.) Somaclones and Development of SCAR Markers on Their Basis

Analysis of Specific RAPD and ISSR Fragments in Maize (Zea mays L.) Somaclones and Development of... RAPD (Random Amplified Polymorphic DNA) and ISSR (Inter Simple Sequence Repeats) markers were used to analyse the genetic divergence between the regenerated plants derived from callus cultures and the original maize line A188. Analysis of polymorphism by using 38 RAPD- and 10 ISSR-oligonucleotide primers showed that the differences between eight examined somaclones and the original line ranged from 6.5 to 23%. As confirmed using new primers, the regenerants derived from callus cultures grouped into two clusters according to their origin. The regenerants isolated from calluses grown for eight months differed from one another and the original line to a larger extent than the regenerants obtained from two-month callus cultures. In some somaclones, molecular marking of the regenerants revealed specific RAPD and ISSR fragments that were absent in other somaclones or the original maize line. On the basis of six specific fragments (five RAPD and one ISSR), SCAR (Sequence Characterized Amplified Region) markers were developed. Specific polymorphism revealed with random primers was completely confirmed using five SCAR markers. Polymorphism of one SCAR marker differed from that revealed with random primers. Five SCAR fragments were inherited as simple dominant traits. One SCAR fragment displayed codominant inheritance. Russian Journal of Genetics Springer Journals

Analysis of Specific RAPD and ISSR Fragments in Maize (Zea mays L.) Somaclones and Development of SCAR Markers on Their Basis

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Kluwer Academic Publishers-Plenum Publishers
Copyright © 2003 by MAIK “Nauka/Interperiodica”
Biomedicine; Human Genetics
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