07-08-2013, 12:56 PM
Screening of chickpea entries for resistance to Wilt
ABSTRACT
Chickpea wilt caused by Fusarium oxysporum f.sp. ciceri is prevalent in most chickpea-growing countries and is a major disease. It is a seed and soil borne disease. The field symptoms of wilt are dead seedlings or adult plants, usually seen in patches. The disease can affect the crop at any stage viz., seedlings (3-5 weeks after sowing) and adult (reproductive) stages. It has been reported from all the states where the crop is grown and causes an annual loss of 10% in India.One hundred and twenty nine chickpea entries consisting of IVT, AVT-1 and AVT-2 under All India Coordinated Research Project on Chickpea programme were evaluated in two replications with 30x10cm spacing in R.B.D. under higher wilt disease pressure in wilt sick plot at Pulses Research Sub-Station, Samba. Mortality ranging from 4.90 to 73.03% was recorded, whereas, in susceptible check, JG-62 and L-550, it was 91.80% and in resistant check (C-235) 5.72%, during Rabi 2010-11. GNG1861, GJG0809, GBC6 of AVT1 (Rainfed), AKG4-11 and CSJK24 showed wilt resistant reaction with mortality of 7.0, 7.8, 7.0, 8.3 and 4.9%, respectively. Dry root rot disease varied from 3.18 to 40.63% during Rabi 2010-11. The seed of these resistant entries were harvested from wilt sick plot. Only one entry GBC6 of AVT1 (Rainfed) has shown resistance with less than 10% plant mortality, which when again tested in wilt sick plot, as well as pot conditions, during rabi 2011-12, again exhibited resistant reaction and can be a good resistance donor.