Genetic diversity in sodium azide (NaN3) induced barley mutants using ISSR markers

Abstract

Sodium azide (NaN3) is widely used as a chemical mutagen in mutation studies, especially to induce point mutations. This study was carried out to determine genetic diversity of six-rowed barley cultivar Finola and 14 mutant lines induced by sodium azide mutagenesis agent and identified by using 5 Inter Simple Sequence Repeat (ISSR) markers. According to the results, 24 bands were produced by five ISSR markers, 18 of them were found polymorphic, and the average polymorphism rate was 76.33%. The average allele number was determined as 4.8, and UBC-808 marker had the highest allele number with 6 alleles, while UBC-820 and UBC-825 markers had the lowest allele numbers with 4 alleles. The average polymorphism information content of the markers used in the study was 0.83, and ranked from 0.78 to 0.86. A dendogram was created using marker data, and according to the dendogram, genotypes were divided into two main groups. Fnl-4, Fnl-8, Fnl-10, Fnl-11 and Fnl-12 mutants existed in the first group, while the others including Finola cultivar were in the second group. Based on the principal component analysis (PCA), Finola cultivar and mutant lines Fnl-5, Fnl-13 and Fnl-14 were evaluated as they are similar to Finola although, differed for some alleles.

Keywords

• barley
• sodium azide
• mutation breeding
• issr markers