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By Indu Sharma

Illness resistance is likely one of the significant elements that may be better to maintain yield strength in cultivated plants. This publication appears to be like at sickness resistance in wheat, targeting the entire economically vital illnesses ― their financial influence and geographical unfold, breeding for resistance, pathogen variability, resistance mechanisms and up to date advances made on resistance genes. more recent innovations for settling on resistance genes and establish resistance mechanisms are mentioned, together with cloning, gene move and using genetically transformed crops.

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Disease Resistance in Wheat (ed. I. Sharma) 33 34 B. McCallum et al. 6 t/ha. Wheat leaf rust occurs annually on about 15Mha. Annual yield losses due to leaf rust are estimated to be 3Mt. Fungicide application has become the principal control measure. India, Pakistan, Bangladesh and Nepal grow nearly 37Mha of wheat, of which 30 Mha are prone to leaf leaf rust continue to be favourable throughout the season. 5 Mha in the Northern Caucasus provides up to 20% of the total grain for Russia. , rust epidemics.

Of wheat rusts in the Himalayas and Nilgiri Hills in northern and southern India, respectively (Nagarajan and Joshi, 1985), where susceptible hosts can be found year round and environmental conditions favour pathogen survival. Urediniospores from these areas are then blown to wheat fields in other areas and initiate disease. Screening for Stem Rust Resistance Testing for resistance in seedling growth stage is normally done on primary leaves under controlled greenhouse conditions. Screening involves the use of a single race in each test.

Urediniospores of Puccinia triticina are found in abundance in these areas. Moist conditions and dew formation will promote infection of susceptible lines. , 1992).

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