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Wheat Information
Service
Number 85: 47-48 (1997)
Research information
Transfer
of rust resistance genes into high temperature and moisture stress
tolerant genotype
R.K. Yadav
Indira Gandhi Agricultural University, Regional Agricultural
Research Station, Sarkanda, Bilaspur (M.P.) 495 001, India
Kanchan and MP 938 are commercial, good yield potential, resistance
to yellow rust and rainfed genotypes of wheat. Hindi 62 is a highly
rust susceptible but high temperature and moisture stress tolerant
genotype. An attempt was made to transfer unidentified yellow rust
resistance from two hexaploid wheat genotypes of Kanchan and MP 938
into Hindi 62
.
Cross of Kanchan and MP 938 with Hindi 62, were made at Wheat
Research Experimental Area, Department of Plant Breeding and
Genetics, Jawaharlal Nehru Agricultural University, Jabalpur (M.P.)
during the year 1993-94. Resistant hybrids were back-crossed to
recurrent parent (Hindi 62) and genotypes showing moderately
resistance to leaf rust were constituted after two successive back
crosses. Screening for rust resistance were made under natural
epiphytotic conditions at Indira Gandhi Agricultural University,
Regional Agricultural Research Station, Sarkanda, Bilaspur (M.P.)
during rabi (winter season) 1996-97.
The lines constituted from the respective cross between Hindi 62 and
Kanchan was exhibited
moderately resistance to yellow leaf rust.
It has been reported that rust resistance provided by single gene is
not effective and durable
resistance is provided only by a few gene combination (McIntosh 1988;
Roelfs 1988; Roelfs et al. 1992).
Since the new line i.e. Hindi 62 x Kanchan was moderately resistant
to leaf rust, it is possible that the resistance genes for leaf rust
derived from the donor parents, i.e. Kanchan and MP 938 are linked to
each other. While, Hindi 62 x MP 938 was still susceptible to leaf
rust. The lines also indicated maximum values for yield contributing
characters (Table
1).
Reference
McIntosh RA (1988) The role of specific genes in breeding for
durable stem rust resistance in wheat and triticale. In: Simonds NW
and Rajaram S (eds) Breeding strategies for resistance to the rust of
wheat. CIMMYT Report 1-9.
Roelfs AP (1988) Resistance to leaf and stem rusts in wheat. In:
Simonds NW and Rajaram S (eds) Breeding strategies for resistance to
the rusts of wheat. CIMMYT Report 10-22.
Roelfs AP, Singh RP and Saari EE (1992) Rust disease of wheat:
Concepts and methods of disease management. CIMMYT Report 81.
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