Year 2016, Volume 62, Issue 1

Year : 2016
Volume : 62
Issue : 1
   
Authors : Emad M. AL-MAAROOF, R.M. Ali, H.A. MAHMOOD T.M. AZIZ
Title : SEARCHING FOR RESISTANCE SOURCES TO WHEAT COMMON BUNT DISEASE AND EFFICIENCY OF BT GENES AGAINST TILLETIA TRITICI AND T. LAEVIS POPULATIONS
Abstract : Common bunt disease incited by Tilletia tritici and T. laevis, is one of the most important disease of wheat in Iraqi Kurdistan region. The disease can cause severe yield losses when the susceptible cultivars are grown without chemical treatment. This study was carried out to search for resistance sources to common bunt disease in wheat and also to determine the efficiency of Bt genes against the pathogen to be introduced in the future breeding program to improve disease resistance. Seeds of different wheat genotypes including the released cultivars and the differential varieties set were artificially inoculated with a mixture of the pathogen teliospores and planted at Bakrajo, Sulaimania for three successive generations. Disease scoring for each genotype was conducted at maturity stage. Results revealed that most of the tested wheat cultivars showed susceptible and intermediate reaction to the disease while the local wheat cultivars Ashor, Acsad, Farris1, Hasad, Waha, Simmetto and the promising advance lines Shaho, Hamada and Charmo2 showed high resistance level to the disease. The international resistance sources Nadro, carbidit, Togano, tillet and Firsal were highly resistant to the local pathogen population. The known resistant genes Bt1, Bt3, Bt5, Bt9, Bt11 and Bt12 were highly effective against the races of Tilletia tritici and T. laevis under Sulaimania conditions.
For citation : Al-Maaroof, E.M., Ali, R.M., Mahmood, H.A., Aziz, T.M. (2016): Searching for resistance sources to wheat common bunt disease and efficiency of BT genes against Tilletia tritici and T. Laevis populations. Agriculture and Forestry, 61(1):175-186. DOI: 10.17707/AgricultForest.62.1.20
Keywords : Cover smut, Triticum aestivum, Resistant genes, Host response, Iraq
   
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ISSN 0554-5579 (Printed)
ISSN 1800-9492 (Online)
DOI : 10.17707/AgricultForest

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