3 research outputs found
Occurrence of the rust resistance gene Lr37 from Aegilops ventricosa in Argentine cultivars of wheat
Occurrence of the rust resistance gene Lr37 from Aegilops ventricosa in Argentine cultivars of wheat
Leaf rust of wheat ( Triticum aestivum L.) caused by the fungus
Puccinia triticina (formerly P. recondita f. sp. tritici), is one of
the most important foliar diseases of this crop. Lr37 rust resistance
gene, which confers resistance in wheat against leaf rust, was
introgressed into cultivated wheat from Aegilops ventricosa Tausch.
Rust races with virulence to Lr37 have been identified in different
countries, but it still provides resistance to a wide range of races
and is useful in combination with other resistance genes. There are no
reports about the presence, frequency and origin of Lr37 in Argentinean
wheat cultivars. In this work, we analyzed 88 registered Argentinean
wheat cultivars developed by different breeding companies and
institutions during the last 15 years by means of a molecular marker
which is diagnostic of the 2NS-2AS translocation which carries Lr37.
Only 4 cultivars showed the amplification product associated with this
chromosome fragment. These four cultivars which carry the translocated
2NS-2AS chromosome were registered by the same breeding company during
the last seven years and all of them have European germplasm in their
genealogy. To the best of our knowledge this is the first report of the
presence of Lr37 in registered South American cultivars
Occurrence of the rust resistance gene Lr37 from Aegilops ventricosa in Argentine cultivars of wheat
Leaf rust of wheat ( Triticum aestivum L.) caused by the fungus
Puccinia triticina (formerly P. recondita f. sp. tritici), is one of
the most important foliar diseases of this crop. Lr37 rust resistance
gene, which confers resistance in wheat against leaf rust, was
introgressed into cultivated wheat from Aegilops ventricosa Tausch.
Rust races with virulence to Lr37 have been identified in different
countries, but it still provides resistance to a wide range of races
and is useful in combination with other resistance genes. There are no
reports about the presence, frequency and origin of Lr37 in Argentinean
wheat cultivars. In this work, we analyzed 88 registered Argentinean
wheat cultivars developed by different breeding companies and
institutions during the last 15 years by means of a molecular marker
which is diagnostic of the 2NS-2AS translocation which carries Lr37.
Only 4 cultivars showed the amplification product associated with this
chromosome fragment. These four cultivars which carry the translocated
2NS-2AS chromosome were registered by the same breeding company during
the last seven years and all of them have European germplasm in their
genealogy. To the best of our knowledge this is the first report of the
presence of Lr37 in registered South American cultivars