Use of simple sequence repeat markers for DNA fingerprinting and diversity analysis of sugarcane (Saccharum spp) cultivars resistant and susceptible to red rot

Genet Mol Res. 2012 May 8;11(2):1195-204. doi: 10.4238/2012.May.8.1.

Abstract

Red rod is an economically important disease of sugarcane caused by the fungus Colletotrichum falcatum. We used a simple sequence repeat (SSR)-based marker system to identify and analyze genetic relationships of red rot resistant and susceptible sugarcane cultivars grown in Pakistan. Twenty-one highly polymorphic SSR markers were used for DNA fingerprinting and genetic diversity analysis of 20 sugarcane cultivars. These SSR markers were found to be highly robust; we identified 144 alleles, with 3-11 alleles per marker and a mean of 6.8. Three SSR markers were able to identify all 20 cultivars. DNAMAN(®)-generated homology tree was used to analyze genetic diversity among these cultivars; all cultivars shared 58% or more similarity. We correlated polymorphism information content and resolving power values with marker effectiveness in the process of sugarcane cultivar identification. We concluded that a small number of SSR-derived DNA markers will allow breeders to identify red rot resistant and susceptible cultivars.

MeSH terms

  • Base Sequence
  • DNA Fingerprinting*
  • DNA Primers
  • Electrophoresis, Capillary
  • Heterozygote
  • Humans
  • Polymerase Chain Reaction
  • Polymorphism, Genetic
  • Repetitive Sequences, Nucleic Acid*
  • Saccharum / genetics*

Substances

  • DNA Primers