Distribution, prevalence and a new physiologic race of Puccinia graminis tritici in Brasil, in 1972 and 1973

Authors

  • Elisa Thomaz Coelho

DOI:

https://doi.org/10.1590/S1678-3921.pab1977.v12.16805

Keywords:

Puccinia graminis tritice, wheat, stem rust, races, resistance genes

Abstract

The 15/65 race of Puccinia graminis tritici was predominant in the 255 stem rust samples collected in Brazilian wheat regions, in 1972 and 1973; that Taco accounted 74% and 50% respectively of the samples. The other races identified, in order of decreasing prevalence, were: in 1972: 11, 15/71, 17, 17/63, 17/61 and 17 T; in 1973,11/74,17/63,15/71,11 and 11 T. The 11/74 race was virulent only ongenos Sr 8 and Sr 11. It was first determined in 1973, second in order to prevalence, comprised about 35% of the samples. The combination of the genes Sr 7a and Sr 11 confers resistance to all occurrent races.

Downloads

How to Cite

Coelho, E. T. (2014). Distribution, prevalence and a new physiologic race of <i> Puccinia graminis tritici</i> in Brasil, in 1972 and 1973. Pesquisa Agropecuaria Brasileira, 12(1), 131–134. https://doi.org/10.1590/S1678-3921.pab1977.v12.16805

Issue

v.12, n. único, 1977

Section

ERRATA