Indian Society of Genetics & Plant Breeding

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Molecular mapping of leaf rust resistance gene in wheat line 19HRWSN-76

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A highly leaf rust resistant genetic stock 19HRWSN-76 from
CIMMYT was crossed to a susceptible variety Zhengzhou
5389 to generate F1 and F2 population to find out the mode
of inheritance and map the resistance gene. The F2
population was inoculated with uredosporic inoculum of
physiological race FHJP of leaf rust. The 3:1 ratio of resistant
and susceptible plants in F2 suggested that the leaf rust
resistance in 19HRWSN-76 is controlled by a single gene,
tentatively named Lr19HRWSN-76. Relationship between
the known leaf rust resistance gene Lr24 and Lr19HRWSN-
76 located on chromosome 3D was established by SSR
marker barc71 and STS 24-16.

Keywords: Leaf rust resistance gene, molecular marker, genetic analysis, molecular mapping

Info

Year: 2015
Volume: 75
Issue: 3
Article DOI: 10.5958/0975-6906.2015.00047.4
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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