Inheritance of Resistance to Powdery Mildew (Erysiphe graminis f. sp. hordei) in Barley

Naghavi, M. R.; Bihamta, M. R.; Yazdi-Samadi, B.; B. Jelodar, N.; Davey, M. R.; Cocking, E. C.

Inheritance of Resistance to Powdery Mildew (Erysiphe graminis f. sp. hordei) in Barley

Authors

M. R. Naghavi ¹

M. R. Bihamta ¹

B. Yazdi-Samadi ¹

N. B. Jelodar ²

M. R. Davey ³

E. C. Cocking ³

¹ Plant Breeding Department , Faculty of Agriculture, University of Tehran, Karaj, Islamic Republic of Iran.

² Department of Plant Breeding, College of Agriculture, University of Mazandaran, Sari, Mazandaran, Islamic Republic of Iran

³ Plant Genetic Manipulation Group, Department of Life Science, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.

Abstract

Two barley (Hordeun vulgare L.) genotypes, Radical and Cwb, with good to moderate levels of resistance to powdery mildew were crossed with a highly susceptible cultivar (Afzal) to determine the genetics of resistance. The parents, Fl, F2 and F3 generations of each of the two crosses, were evaluated for powdery mildew resistance in the glasshouse and field at the College of Agriculture in Karaj during 2000. The x2 analysis of the segre-gating ratios in the F3 generations indicated that the resistance was controlled by one gene at seedling stage and by two or three genes at adult plant stage in Cwb and Radical, respectively. Radical showed a higher level of resistance than the Cwb, therefore, it is a better source of resistance to powdery mildew.

Keywords

Resistance

Barley

powdery mildew

Genetics

Inheritance