(go to
KOMUGI Home) (go
to WIS List) (go
to NO.90 Contents)
Wheat Information Service
Number 90:49-51 (2000)
Research information
Evaluation of cereal cyst. nematode (Heterodera
avenae) resistant wheat variety in Rajasthan, India
G.L. Sharma and S.N. Sharma
Department of Nematology, Agricultural Research Station,
Durgapura, Jaipur- 302018, India
The cereal cyst nematode CCN (Heterodera avenae) causing
'molya' disease in wheat crop is a severe problem in light sandy
areas of India, like state of Hariana, Punjab, Himachal pradesh,
Western part of U.P. and Rajasthan. The wheat grown in thirteen
districts of Rajasthan state is being suffered by the infection of
molya disease incited by H. avenae every year. The total area
of wheat cultivation in Rajasthan is about 22.41 lac hectare (1998).
Out of that about 1.5 lac hectare is mapped suffering with this
nematode. This disease is used to cause about 40-50% yield losses,
which may attain up to 60-65% at its severity (Mathur 1969; Mathur et
al.1980). Looking towards the state wheat production (67.8 lac ton),
the CCN suffered area (1.5 lac. ha) instead of producing 4.5 lac ton,
only yielding 2.25 lac ton (1998-1999) and grain loss in terms of
money amounts up to about Rs. 11.25 crores. Earlier certain efforts
using cultural practices and chemicals were also exercised, but to
achieve easy and economic goal, the breeding for the disease
resistant program be initiated since 1991 for development of CCN
resistant variety for tangible advancement in wheat production in
molya infected areas of the country.
About 5000 wheat entries (genotypes / strains) received from exotic
(ICARDA, CYMMIT, Australia) and indigenous (NPGR & DWR) resources
were screened in naturally and artificially CCN infested field
conditions. Of the evaluated germplasm lines, one strain namely
AUS-15854 was observed resistant to CCN in field condition. Further
this strain was again vigorously tested for CCN resistant in
subsequent years. Simultaneously, to find out the genetic behavior of
this CCN resistance, an experiment was also planned out for three
years. The results revealed that a single dominant gene controlled
the CCN resistance in AUS-15854 wheat genotype.
-->Next
(go to
KOMUGI Home) (go
to WIS List) (go
to NO.90 Contents)