Indian Society of Genetics & Plant Breeding

Inheritance of Alternaria leaf blight resistance in durum wheat (Triticum durum Desf.)

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Leaf blight incited by Alternaria triticina is a major biotic
constraint to wheat
(Triticum durum Desf.) cultivation
particularly in north-eastern plain zones of India. For
identifying the number and nature of resistance conferring
genes to leaf blight, three resistant Leeds, Wakooma and
Hercules and five susceptible cultivars of durum wheat
(Triticum durum Desf.). HD 4502, DWL 5023, Raj 1555,
HD 4530 and Meghdoot were crossed in an 8 x 8 half
diallel fashion. Susceptibility of HD 4502, DWL 5023, Raj
1555 and HD 4530 was found to be controlled by a
dominant gene and that of Meghdoot by two dominant
complementary genes. The resistant parents carry
recessive alleles of the genes present in susceptible
cultivars. All the res-genes in the resistant parents are
identical in nature.

Keywords: Durum wheat, leaf blight, genetics, inheritance, disease resistance.


Year: 2006
Volume: 66
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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