Annual Progress Report on Malting Barley Research March, 2002

7
Washington (Fossum Cereals and Washington State University). These entries were
planted in Toluca, the San Luis Valley and Yuma, Colorado.
Results
In Toluca Valley all varieties were exposed to high levels of natural endemic inoculum of
the stripe rust pathogen. A total of 11.4 % of the 902 entries were rated resistant.
Unfortunately in the San Luis Valley and Yuma, Colorado insufficient levels of infection
developed and accurate evaluations for BSR were not possible.
In Huncayo only 5.1 % of the entries were rated resistant. While in Callejon de Huaylas
63.1 % were rated resistant (Table 1) most of the entries rated resistant were in the range
of 0 infection type.
Table 1. Barley Stripe Rust Results in Mexico and Peru, 2000-01
INFECTION TYPE
HUANCAYO
%
PERU
CALLEJO DE HUYLAS
%
MEXICO
TOLUCA VALLEY
%
0 3.5 56.3 0.0
R 1.1 4.4 4.8
MR 0.5 2.4 0.0
MS 2.9 8.6 6.6
S 92.0 28.3 88.6
Different infection types were observed in certain lines in Huancayo and Callejon de
Huaylas in Peru and the Toluca Valley, Mexico. In Callejon de Huaylas some entries
were resistant while in Huancayo and Toluca Valley they were susceptible. The entries
BCD 47 and 00-2R-0064 were resistant in the Toluca Valley and Callejon de Huaylas
while in Huancayo they were susceptible see
Table 2. Comparison of Barley Stripe Rust Infection Types in Selected Lines in
Huancayo, Callejon de Huaylas, Peru and Toluca Valley, Mexico
PEDIGREE
PERU
HUANCAYO CALLEJON DE HUAYLAS
MEXICO
TOLUCA VALLEY
99ID967 90 S T MR 90 S
BCD 47 100 S 0 5 MS/TR
CENTURY 100 S T MS 70 S
6B98 – 9058 100 S T R 100 S
2B98–5421 100 S 5 MR 90 S
00–2R–0064 50 S 0 T R