Molecular mapping of leaf rust resistance gene Rph14 in Hordeum vulgare

Theor Appl Genet. 2009 Nov;119(7):1281-8. doi: 10.1007/s00122-009-1132-0. Epub 2009 Aug 27.

Abstract

An incompletely dominant gene conferring resistance to Puccinia hordei, Rph14, identified previously in an accession of Hordeum vulgare, confers resistance to all known pathotypes of P. hordei in Australia. Knowledge of the chromosomal location of Rph14 and the identification of DNA markers closely linked to it will facilitate combining it with other important leaf rust resistance genes to achieve long lasting resistance. The inheritance of Rph14 was confirmed using 146 and 106 F(3) lines derived from the crosses 'Baudin'/'PI 584760' (Rph14) and 'Ricardo'/'PI 584760' (Rph14), respectively. Bulk segregant analysis on DNA from the parental genotypes and resistant and susceptible DNA bulks using DArT markers located Rph14 to the short arm of chromosome 2H. DArT marker bPb-1664 was identified as having the closest genetic association with Rph14. PCR based marker analysis identified a single SSR marker, Bmag692, linked closely to Rph14 at a map distance of 2.1 and 3.8 cm in the 'Baudin'/'PI 584760'and 'Ricardo'/'PI 584760' populations, respectively.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Australia
  • Basidiomycota / genetics*
  • Chromosome Mapping*
  • Chromosomes, Plant
  • Genes, Plant*
  • Genetic Linkage
  • Genetic Markers
  • Hordeum / genetics*
  • Plant Diseases / genetics*

Substances

  • Genetic Markers