Meeting the Challenge of Yellow Rust in Cereal Crops - ICARDA

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Table 8. Field reaction of wheat cultivars commonly grown in Central and Western
Asia to yellow rust at six locations
Genotype
Testing sites (country) and reaction to yellow rust
SYR LEB TUR KYR TAJ AZE
Gerek 79 S S R MR R S
Seri 82 S S R MR MR S
Sardari S MS R – S S
Bezostaya (S) MS S MS MS S MR
Polovchanka (F) MR S R R MS –
Yuna (S) S S S S S S
Skiphyanka (F) S S S S S S
Cham 6 (S/F) MS MS R - MS R
Skifyanka S S S S MS S
Opaks 26 S S S S MS S
Mirbachir 80 – – S
NOTES: Countries are SYR = Syria, LEB = Lebanon, TUR = Turkey, KYR = Kyrgyzstan, TAJ = Tajikistan, AZE
= Azerbaijan. Reaction = Field reaction to yellow rust at adult growth stage in 1999 and 2000 seasons.
Stripe rust race monitoring in CWANA has revealed that race 6E0 (virulent
on Yr6 and YrA) is the most frequent race in the region, and it has been
detected every year since 1972. In West Asia, race 38E150 (virulent on Yr2, Yr6,
Yr7, Yr8) was the second-most frequent pathotype during the last five years
(2001–2005), whereas races 134E152 (virulent on YrA, Yr2, Yr6, Yr7, Yr8, Yr9),
230E150 (virulent on YrA, Yr2, Yr6, Yr7, Yr9, YrSU, YrSD, Yr17, Yr18) and
119E158 (virulent on YrA, Yr1, Yr2, Yr3, Yr6, Yr7, Yr9, Yr10, Yr17) were
detected in Lebanon, Iraq and Yemen, respectively. Thus, a wide range of
virulent races is evolving in this region, causing the breakdown of stripe rust
resistance in wheat (Johnson et al., 2002; Yahyaoui et al., 2002; Wellings et al.,
2000).
Single-uredinial isolates of Puccinia striiformis f.sp. tritici (Pst) randomly
sampled from some countries in CWA as well as in the NVRS region were
characterized for physiological races at ICARDA, Iran (SPII), Pakistan (PARC)
and Egypt (ARC). A total of 95 physiological races were identified (Table 9).