Author/Authors :
Fasihi، V نويسنده Department of Agronomy and Plant Breeding, Ardabil Branch, Islamic Azad University, Ardabil, Iran, , , valizadeh، M نويسنده Department of Agronomy and Plant breeding, Faculty of Agricultural, Tabriz University, Tabriz, Iran, , , Shiri، M نويسنده Agricultural and Natural Resources Research Center of Ardabil, Ardabil, Iran , , Imani، A.A نويسنده Department of Agronomy and Plant Breeding, Ardabil Branch, Islamic Azad University, ,
Abstract :
Ear rots caused by different Fusarium spp. are one of the most dangerous foods and feed safety challenges in
maize production, and yield losses on the average of 20% (between 1.5-40%) have been registered from
artificial inoculations. Growing resistant hybrids represents one of the most efficient solutions for reducing the
yield losses caused by Fusarium spp on the maize. So, in order to find the resistant inbred line, ten inbred lines
were evaluated for their reaction to Fusarium verticillioides under field conditions, at the Pars Abad-e- Moghan
(39° 41ʹ N 47° 32ʹ E, Iran) 2011, using an RBCD design with three replications. For artificial inoculation, fungal
inoculum consisting of a mixture of spores was applied to ear 2 to 5 days after silk stage by Nail Punch method.
At harvesting time, disease severity based on disease progress in each ear, were evaluated. The results showed
Mean grain yield under natural infection condition was 106.13 grams per plant, while mean grain yield under
artificial infection condition was 77.92 grams per plant which showed a reduction of 26.53% in comparison to
the natural infection condition. The results also showed that MO17 and B73rfc inbred lines were resistant and
susceptible Fusarium diseases. Inbred lines possessing resistance to ear rot would be valuable breeding stock for
use as parents of hybrids that can be grown by farmers.
