Meeting the Challenge of Yellow Rust in Cereal Crops - ICARDA

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66 years. Yellow rust infection was highly correlated between all years, with r being 0.57 for years 1 and 2, 0.86 for years 1 and 3 and 0.66 for years 2 and 3 (all significant at P
67 Table 1. Estimation of the number of additive, non-race-specific genes for yellow rust through the identification of HPTR, HPTS and intermediate lines in the Avocet "S"×Attila F 5 population of 148 lines Frequency of responses HPTR HPTS Other χ2 Observed frequency 18 10 120 Expected frequency, 2 genes 28.33 28.33 91.34 24.6** Expected frequency, 3 genes 12.39 12.39 123.22 3.1 Expected frequency, 4 genes 5.42 5.42 137.16 35.5** NOTES: ** indicates significant χ 2 value at P=0.01. HPTR = Homozygous Parental Type Resistant; HPTS = Homozygous Parental Type Susceptible AFLP analysis DNA samples were pooled to make bulks for the rapid screening of different primer combinations in an AFLP analysis. In total, 192 primer combinations were used and 22 potential polymorphisms were identified for further investigations. The potential polymorphisms were analysed on the individual lines that made up the bulks. Five polymorphisms showed high levels of association, in either coupling or repulsion, with resistance (Table 2). Of these polymorphisms, two had been previously identified as being associated with the non-race-specific rust resistance gene complex Lr46/Yr29 (William et al., 2002). Furthermore, analysis of the initial 32 homozygous parental type lines indicate that the new markers are likely to be more closely associated with resistance than the existing Lr46/Yr29 markers. It was not known whether the 3 new polymorphisms were associated with Lr46/Yr29 or a different slowrusting gene. The levels of recombination between one of the known Lr46/Yr29 markers and the three new markers were therefore measured on the entire population of 148 lines. The results show that the three new markers segregated in 79% or 82% of lines with the known Lr46/Yr29 markers (Table 3), suggesting the new markers are associated with the Lr46/Yr29 locus. Furthermore, in this population, the new markers accounted for a larger reduction in disease severity of both leaf rust and yellow rust than did the known Lr46/Yr29 marker (Table 3). This supports the notion that the new markers are more closely associated with Lr46/Yr29 than previously identified markers.
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Meeting the Challenge of Yellow Rus
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iii Foreword Wheat is grown on roug
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v Preface The Central and West Asia
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vii About this publication This vol
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ix 2nd Regional Yellow Rust Confere
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Meeting the Challenge of Yellow Rus
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4 Epidemiology of wheat yellow rust
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6 Prevalent yellow rust pathotypes
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8 Pakistan Dr Badaruddin Soomro, PA
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10 Dr Naeem Ahmad, Wheat Research I
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Yellow rust of wheat in Nepal: an o
Page 25 and 26: inoculum originating from infected
Page 27 and 28: 17 Control Efforts were made to dev
Page 29 and 30: Karki, C.B. 1994. Genetics of rust
Page 31 and 32: No virulence was observed on plants
Page 33 and 34: 23 Results and discussion In the tw
Page 35 and 36: Virulence to yellow rust resistance
Page 37 and 38: and Yr27, the seedling data may not
Page 39 and 40: Yield evaluations of the PBW 343- a
Page 41 and 42: variation for yellow rust resistanc
Page 43 and 44: A number of Kauz-derived cvs, e.g.
Page 45 and 46: Kisana, S.N., Mujahid, Y.M. & Musta
Page 47 and 48: 37 Material and methods Wheat nurse
Page 49 and 50: Challenge of a new race of Puccinia
Page 51 and 52: 41 Table 1. Response of the yellow
Page 53 and 54: 43 Occurrence and importance of yel
Page 55 and 56: To better explain the differences i
Page 57 and 58: Weather data were taken from the ne
Page 59 and 60: Disease progress stopped, in genera
Page 61 and 62: Roelfs, A.P. 1985. Epidemiology in
Page 63 and 64: The wheat stripe rust pathogen over
Page 65 and 66: 55 6E150A+ 4E8A+ 6E130A+ 130E2A+ 6E
Page 67 and 68: Agriculture-guided evolution of pat
Page 69 and 70: Yr SD, Yr SU and YrA was observed.
Page 71 and 72: The data presented in Table 3 show
Page 73 and 74: Kirmani, M.A.S. 1980. Comparative e
Page 75: ust infection at the CIMMYT station
Page 79 and 80: Resistance to stripe rust disease o
Page 81 and 82: may be from the Aegilops parent as
Page 83 and 84: McNeal, F.H., Konzak, C.F., Smith,
Page 85 and 86: Disease severity (percentage of rus
Page 87 and 88: 77 Table 2. Genetic analysis of res
Page 89 and 90: Defence mechanisms against rust, an
Page 91 and 92: for the biosynthesis of a large num
Page 93 and 94: components of the signalling pathwa
Page 95 and 96: Xing, T., Wang, X.J., Malik, K. & M
Page 97 and 98: provided for final decision regardi
Page 99 and 100: spreader, cv. Morocco. The data was
Page 101 and 102: 91 Table 4A. Entries included in Na
Page 103 and 104: 93 Table 5A. Entries in the Nationa
Page 105 and 106: 95 References Ahmad, S., Rodriguez,
Page 107 and 108: Yellow rust (YR) is one of the most
Page 109 and 110: 99 Table 1. Yellow rust reaction of
Page 111 and 112: 101 100 90 80 CHECKS IW IWWIP CAC E
Page 113 and 114: • To investigate the effectivenes
Page 115 and 116: 105 Figure 1. Locations of yellow r
Page 117 and 118: Table 2. Terminal reaction of diffe
Page 119 and 120: Isogenic lines possessing Yr9 and Y
Page 121 and 122: Inqilab 91 at Nowshera, Swabi and M
Page 123 and 124: Selection of yellow rust-resistant
Page 125 and 126: These genotypes—depending on the
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Reaction of some international whea
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nurseries were irrigated with mist
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Name Pedigree Source 23 Tevee'S'//B
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Name Pedigree Source 71 NS732/HER S
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Name Pedigree Source 41 Gcn/4/D68-1
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127 Role of yellow rust-resistance
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genes, such as with Yr6 in cultivar
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Dubin, H.J., Johnson, R. & Stubbs,
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134 Yellow rust of wheat in Ethiopi
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136 Virulence of stripe rust on dif
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138 Turkey, Lebanon and Syria. Race
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140 Evaluation of seedling and adul
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142 of resistance not only to yello
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144 Yellow rust reaction, disease d
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146
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148 Outputs of the ten years of eva
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150 Characterization of resistance
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152 Results of testing winter wheat
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154 Dr Valentina Ibragimoval, Kyrgy
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156 Surveys of yellow rust populati
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158 nurseries. ICARDA, at its headq
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160 Table 2. Yellow rust differenti
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162 Table 4. Selected elite cultiva
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164 Table 7 shows the relative effe
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166 Table 8. Field reaction of whea
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168 Syria, Lebanon, Iran and Turkey
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170 Regional Conference on Yellow R
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172 moderate and high levels of res
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174 Umanka. The same disease reacti
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176 genes Yr1, Yr2, Yr6, Yr7, Yr8 a
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178 Table 3. Resistance to yellow r
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180 Monitoring bread wheat genotype
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182 3000 masl. Susceptible check cv
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184 Table3. Disease severity and re
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186 with great effect, particularly
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188 Conclusion Relatively old bread
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191 Abstracts of other papers prese
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193 Global perspectives in wheat ye
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195 Yellow rust in Central and West
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197 Outputs of the ten-year evaluat
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199 Yellow rust resistance of bread
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201 Influence of weather conditions
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203 Virulent pathotypes of yellow r
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associated with a greater yielding
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een based on a single major gene or
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209 Monitoring stripe [yellow] rust
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211 Pathotype and molecular variabi
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Functional analysis of yellow rust
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215 Study on resistance reaction of
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217 Resistance of International Win
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219 Researching the influence of an
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Australian pathotypes of Puccinia s
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and cultural practices have been ad
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225 Development of a detached leaf
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227 Virulence variation of Puccinia
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intervals and also as the border of
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231 Virus-induced gene silencing in
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233 Inheritance of resistance to ye
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generated from monogenically segreg
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• slow-rusting genes: Yr9, Yr12,
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239 Meeting the Challenge of Yellow
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241 Contents List of participants i
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Resistance response of promising wh
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Constructing physical and genomic m
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Inheritance of yellow rust resistan
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249 Algeria List of participants Dr
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Tajikistan Prof. Dr Hafiz Muminjano
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Identification of effective and dur
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For each resistant genotype (Table
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257 Figure 1. AUDPC of ineffective
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259 Figure 3. AUDPC of susceptible
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Among the wheat lines tested, 51% c
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263 Introduction Wheat (Triticum ae
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wheat germplasm lines from were tes
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An analysis of the 2009 epidemic of
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Overall yield loss estimation A gen
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271 Table 4a. Monthly mean temperat
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Further studies on Yr9 virulent pat
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evaluation, these varieties were ha
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277 Table 1. Genotype response to p
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may result in losses of up to 70% i
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Table 1A. Wheat yellow rust scenari
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283 Table 1C. Wheat yellow rust sce
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285 No. Cultivar/Yr genes Yellow ru
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Roelfs, A.P., Singh. R.P. & Saari,
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289 Materials and methods This stud
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ineffective (Yahyaoui et al., 2004)
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Combining high yield potential and
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Breeding for yellow rust-resistant
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It is evident from Table 3 that Lu2
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299 Table 4. Rust reactions in hot-
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Evaluation of Indian wheat genotype
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components individually is quite la
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305 Table 1. Grouping of AVT-2nd ye
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Effective and ineffective resistanc
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seedling resistance and adult plant
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The cultivars expressing an infecti
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New approaches in traditional resis
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(resistant × resistant); susceptib
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twice that of resistant ones. When
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nurseries from Oklahoma University
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321 Figure 1. Map of the Republic o
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323 % 90 80 70 60 50 40 30 20 10 0
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In comparison with the local variet
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327 Introduction Wheat (Triticum ae
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Virulence and avirulence factors of
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(Peterson, Campbell and Hannah, 194
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333 No. Genotype Gene(s) Severity a
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An overview of results of five year
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combinations of adult plant resista
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Sources of resistance to wheat stri
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APR. A spectacular example was the
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In our breeding programme we are lo
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345 Introduction Stripe Rust of whe
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Table 1. Adult plant infection type
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Dehghani, H., Moghadam, M.R., Ghann
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species in the region determined th
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353 Table 4. The materials tested f
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Breeding for resistance to rust dis
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diseases, powdery mildew, sunn pest
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359 References Dzhunusova, M., Yahy
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high yielding widely grown cultivar
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susceptible to susceptible in 2007,
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Of the yellow rust samples collecte
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367 Abstracts of other papers prese
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369 Monitoring pathogen dynamics in
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1980s. Occurrence of virulence for
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373 Race changes of Puccinia striif
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375 High-temperature, adult-plant (
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types with race Pst-3 than with Pst
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379 Investigation of genetic resist
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381 Gene sequencing reveals heterok
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383 Molecular characterization of w
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papillae, cell wall appositions and
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infection are obtained through arti
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2000 masl; Ae. cylindrica is locate
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391 Reaction of winter facultative
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393 Yellow rust in the south of Ukr
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395 Study of diverse winter wheat g
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397 Yellow rust epidemics and virul
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399 Wheat yellow rust situation in
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401 Inheritance of yellow rust resi
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infection of the pathogen for four
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Club and other susceptible wheat cv
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407 Selection of wheat cultivars fo
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conditions. In 2006 and 2008, due t
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411 Regulation of development of ye
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