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Discussion 109 B.A. Malik Dr. K.B.Singh mentioned that desi crosses will he made at ICRISAT and F2 generation will be supplied to ICARDA for screening against Ascochyta rabiei and developing material for inclzsion in the international nurseries. My suggestion is that F2 bulk (depending upon the availability of seed) may be supplied to the cooperating national programs for selection under their own conditions. This would accelerate the process of cultivaral evolution and would reduce the risk of disease incidence due to diversified testing. J.B. Smithson F2 populations o' crosses involving Ascochyta-resistantdesi lines will certainly be provided to Pakistan next season. H.C. Weltzien Were your mixtures or multilines exposed to natural infection or to artifical inoculation? The principle of multiline effect can only work when a natural epiphytotic is observed and the slower disease progress is measured. K.B. Singh. The trial was grown at Tel Hadya and Lattakia Under Tel Hadya conditions the disease pressure was high as the experimental plot was entirely surrounded by susceptible genotypes, whereas at Lattakia, the experiment has been grown away from disease nursery. But the disease development and spread was high at both the locations. T.S. Sandhu For launching a breeding program for pyramiding genes in a simple cultivar or development of multilines we need information that genes in the resistant sources are located at different loci and are not multiple alleles of the same gene. I am afraid this information is lacking in chickpea in respect of resistance to ascochyta blight. K.B. Singh Our knowledge about the genetics of resistance to blight is limited. This is precisely the reason that we propose to identify the genes first and then to incorporate them in a single genotype. The information about the races of the pathogen and sources of resistance for each race is essential before initiating any program for the development of multilines in chickpeas. F.A. Elsayed The esistance of mixtures, which you have discussed in your presentation, are not even close to the definition of multilines? K.B. Singh We have not initiated any program for the development of mulitlines because we do not have information on races of blight pathogen. Only after establishing races and identifying sources of resistance to different races, one could initiate
110 the program for the development of multilines. We are exploring at the moment wheteher a mixture of cultivars woujd provide any gain in yield and/or resisitance to blight. M.S. EI-Matt Infection by ascochyta blight affects growth and develoment of plants adversely. What is their effect on yield and how were losses assessed? K.B. Singh Ascochyta blight, in epiphytotic conditions, can cause total yield loss. The yield loss is estimated by growing a set of genotypes under diseased and disease.free conditions. In diseased plots the epiphytotic conditons are artificially created, whereas in the disease-free plots, the crop is protected through fungicide. The yield loss is estimated by subtracting the yield obtained in diseased plot from that obtained in diesease-free plot.
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A14 ""..."W~e S~wn ofCh all il NM I
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WORLD CROPS: PRODUCTION, UTILIZATIO
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Copyright (c) 1984 by ICARDA All ri
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VI THIRD SESSION: WINTER SOWING Agr
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Foreword The advancing of sowing da
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Editors' Note The idea to hold this
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Chairman, Ladies and Gentlemen, Ope
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4 including stunt virus (pea leaf r
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6 in with Iarmers'plans and proposa
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8 about 130 to over 200 days, where
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10 Table I Mean yield and range of
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12 International Yield Trials A 10-
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14 small plots on farmers' fields i
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16 HANOUNIK, S.B. 1979. Diseases of
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18 diospores (Khune and Kapoor 1980
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20 2. Reproduction Asexual. The ase
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22 surface. However, the fungus los
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24 observed small reddish brown spo
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26 Reddy and Nene (1979) developed
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28 suggested the application of pot
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30 ASKEROV, I.B. 1968. Ascochytosis
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32 NEMLIENKO, F.E. and LUKASHEVICH,
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Proceedings ofthe Workshop on Ascoc
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100/ ILC 1929 90 -80./ 8o0 / ILC
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30 24 18 12 6 Temperature (°C) t6
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I I -I - --ii ' Disase Ic I ii I'll
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infected seed is a much more potent
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Proceedingsof the Workshop on Ascoc
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early February were found to give e
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pot assembly consists of a stem tha
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Table I A quantitative 9-point rati
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inoculating the plants by uniformly
Page 65 and 66: Proceedings ofthe Workshopon Ascoch
Page 67 and 68: Table I Cultural characteristics of
Page 69 and 70: Line/ Table 2 Disease grades produc
Page 71 and 72: India and Iran were highly sporulat
Page 73 and 74: LUTHRA, J.C. and BEDI K.S. 1932. So
Page 75 and 76: J.S. Grewal There are more chances
Page 77 and 78: 68 Table I Summary of results of sc
Page 79 and 80: 70 Table 3 Summary of results of sc
Page 81 and 82: 72 ery originated from the USSR, Sp
Page 83 and 84: Table 7. Contd. Rating on 1-9 Scale
Page 85 and 86: Table 8 Contd. Rating on 1-9 Scale
Page 87 and 88: Table 9. Contd. Entry Origin Rating
Page 89 and 90: Table 10 Differential reaction of s
Page 91 and 92: 82 1069, 1467, 1591 were found resi
Page 93 and 94: 84 ing of the remaining collections
Page 95 and 96: 86 AUJLA, S.S. 1964. Study of eleve
Page 97 and 98: Proceedings ofthe Workshop on Ascac
Page 99 and 100: Parents diallel cross F1 diallel cr
Page 101 and 102: R.Pieters Malic acid is known to ha
Page 103 and 104: 96 (Hawtin and Singh 1983). Asv.-,h
Page 105 and 106: 98 3. Identification of as many sou
Page 107 and 108: 100 Germ. Evaluation Disease Res. M
Page 109 and 110: 102 Robinson (1976) has further dev
Page 111 and 112: 104 and by the time a multilinc cul
Page 113 and 114: 106 lines will then be made availab
Page 115: 108 GILL, K.S., NANDA, G.S., SINGH,
Page 119 and 120: 112 where they are not present. See
Page 121 and 122: 114 cides have been found to be eff
Page 123 and 124: 116 indicates that this propagate i
Page 125 and 126: 118 Great care must be exercised in
Page 127 and 128: 120 nature. Ascochyta propagules on
Page 129 and 130: 122 ZACHOS, D.G., PANAGOPOULOS, C.G
Page 131 and 132: 124 0 40 g30 Max 30 20. .,,10 Min ,
Page 133 and 134: 126 ranged from November 22, 1978 t
Page 135 and 136: 128 Genotypes Table 2 Grain yield o
Page 137 and 138: 130 Response to Plant Population Th
Page 139 and 140: 132 ILC 1929 at Tel Hadya and ILC 4
Page 141 and 142: 134 Data in Tab. 5 emphasize the im
Page 143 and 144: 136 appears adequate, therefore no
Page 145 and 146: 138 Discussion F. EI-Sayed I am ass
Page 147 and 148: Proceedings of the Workshop on Asco
Page 149 and 150: Table I The timing of reproductive
Page 151 and 152: Table 3 Accumulated water use by sp
Page 153 and 154: Es x (1 - a) x Eo t where t is the
Page 155 and 156: BRIDA cm Water /Depth Interva', 3 4
Page 157 and 158: crops extended deeper than under wi
Page 159 and 160: (as at Jindiress), the winter-sown
Page 161 and 162: eduction in the size of the crop's
Page 163 and 164: Discussion G.C. Hawtin You raised a
Page 165 and 166: Table I Nodutation and total drymat
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162 Inoculation with single strain
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164 These results indicate that pho
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166 T.S. Sandhu Is there any techni
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168 April for Tal Abaid (36*42'N, 3
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170 At the end of the severe cold p
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172 Table 4 Origin of lines having
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174 stage (Tab. 6). Of the five cul
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176 HERZOG, H. 1978. Wachsturnsverh
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Proeedings of the Workshop on Ascoc
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There is little information availab
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of the major and minor pests in thi
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attack any other important crop pla
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KAY, D.E. 1979. Food Legumes - Crop
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190 On the other hand, two items th
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192 M.V. Reddy It looks as if the c
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Country World ICARDA region Algeria
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196 Table 2a Export of chickpeas by
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198 India, Saudi Arabia, Venezuela
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Proceedings ofthe Workshop on Ascoc
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Chickpea Cultivation 203 In Syria m
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Table 2 Comparison of the growth, s
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Proceedings of the Workshop on Asco
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Excessive postharvest losses. Posth
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Seedbed preparation is very minimal
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carried out at the same time with w
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Table 4 Topographical classificatio
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were absorbed by the canning indust
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223 The advantages of winter sowing
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226 cultivars which could be plante
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Table 2 Area, production and yicld
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233 Threshing is mostly done by bul
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182, 192,'194,1069, 1772,3279,2380,
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238 4. Mycosphaerella pinodes and A
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240 Kausar (1960) discussed the rea
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242 Date Tale 2 Maximum temperature
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244 Table 4 Maximum temperature and
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soil moisture and therefore it is a
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Table 2 Characteristics of chickpea
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253 Table 5 Results of a trial on w
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Conclusion Chickpea in Tunisia has
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260 however, remained almost static
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262 Agricultural Universities and s
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264 greatest at flowering and fruit
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266 Basis of Resistance Kunzru and
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268 Discussion M. Aslain What is yo
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270 vars. It was assumed that the d
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Proceedings of the Workshop an Asco
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0- 400 ha ® Em 401 -1000 ha 1001 -
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277 Castille and even (1500 kg/ha)
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Table 3 'Rabia' attacks - environme
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would be pure extension. Diffusion
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284 7. The role of crop debris as a
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286 involving only a few treatments
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288 MAKKOUK, Khalid, Faculty of Agr
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