Indian Society of Genetics & Plant Breeding

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NATURE AND INHERITANCE OF LEAF RUST RESISTANCE FROM THREE WHEAT CULTIVARS

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The nature and inheritance of leaf rust resistance of cultivars Manitou, Pavon 76
and Romany against Indian races 12, 77, 77-1, 77-3, 108 and 162 was studied. Manitou
carried a dominant gene effective against race 162 that is different from Lr13 already
reported from this cultivar. Pavon 76 and Romany carried the genes Lrl and LrlO
as well as a new dominant gene for low seedling reaction against race 108. In
addition, Romany also carried a gene for low seedling reaction against race 77-1
and a new adult plant resistance gene against race 77-3. The field resistance of
cultivars Manitou and Pavon 76 against race 77-1, without evident hypersensitive
response was conditioned by duplicate genes and it is proposed to be durable. The
resistance of Romany in field tests against race 77-1 was also due to duplicate genes
but at least one of these genes is hypersensitive in nature.
 

Keywords: Non-hypersensitive resistance, Puccinia recondita, durable resistance

Info

Year: 1999
Volume: 59
Issue: 1
Article DOI: na
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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