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Table 8. Announced CIMMYT lines 1991-1993. Year announced Adaptation CML No. No. of lines 1991 Lowland tropical 1-58 58 59-74 16 SUbtropical 75-116 42 117-139 23 1992 QPM tropical 140-172 33 QPM subtropical 173-194 22 Mid-altitude (Harare) 195-216 22 Lowland tropical 217-238 22 1993 Highland 239-246 8 Total 246 246 References Baal, W.J. 1880. Indian Corn. Rep. Mich. Board Agric. 19: 279-80. Beck, D.L., S.K. Vasal and J. Crossa. 1990. Heterosis and combining ability of CIMMYT's tropical early and intermediate maturity maize germplasm Maydica 35: 279-285. Beck, D.L., S.K. Vasal and J. Crossa. 1991. Heterosis and combining ability among CIMMYT's subtropical and temperate intermediate maturity maize germplasm. Crop Sci. 31: 68-73. comstock, R.E., H.E. Robinson and P.H. Harvey. 1949. A breeding procedure designed to make maximum use of both general and specific combining ability. Agron. J. 41: 360 67. Crossa, J., S.K. Vasal and D.L. Beck. 1990. Combining ability study in diallel crosses of CIMMYT's tropical late yellow maize germplasm. Maydica 35: 273-278. Davis, R.L. 1927. Report of the plant breeders. Puerto Rico Agric. Exp. Sta. 14-15. Duvick, D.N. 1977. Genetic rates of gain in hybrid maize yields during the past 40 years. Maydica 22: 187-196. East, E.M. 1908. Inbreeding in corn. conn. Agric. Sta. Bull. 1907: 419-428. Jenkins, M.T. 1934. Methods of estimating performance of double crosses in corn. J. Am. Soc. Agron. 26: 199-204. Jones, D.F. 1918. The effects of inbreeding and cross breeding upon development. Conn. Agric. Exp. Sta. Bull. 207: 5-100. Lonnquist, J.H. 1964. A modification of the ear-to-row procedure for the improvement of maize populations. Crop Sci. 4: 227-228. Meghji, M.R., J.W. Dudley, R.J. Lambert and G.F. Sprague. 1984. Inbreeding depression, inbred and hybrid grain yields, and other traits of maize genotypes representing three eras. Crop Sci. 34: 545-549. Russell, W.A. 1984. Agronomic performance of maize cultivars representing different eras of breeding. Maydica 29: 375-390. Shull, G.H. 1908. The composition of a field of maize. Am. Breeder's Assoc. 4: 296-301. ShUll, G.H. 1909. A pure line method of corn breeding. Am. Breeder's Assoc. 5: 51-59. 200
Srinivasan, G., S.K. Vasal, F. Gonzalez C., H. Cordova, S. Pandey and N. Vergara. 1992. Rendimiento y estabilidad de hibridos de maiz de cruzas simples evaluados en COlombia, Mexico y Centro America. Agron. Mesoamericana 4: 23-29. Vasal, S.K., D.L. Beck and J. Crossa. 1986. Studies on the combining ability of CIMMYT maize germplasm. CIMMYT Res. Highlights 1986. CIMMYT, El Batan, Mexico. Vasal, S.K. and G. Srinivasan. 1991. Breeding strategies to meet the changing trends in hybrid maize development. In Special Issue commemorating the Golden Jubilee Celebration Symposium of the Indian Soc. of Genetics and Plant Breeding, New De"lhi. 12-15 Feb. 1991. Indian J. Genet. (in press). Vasal, S.K., G. Srinivasan, D.L. Beck, J. Crossa, S. Pandey and C. De Leon. 1992a. Heterosis and combining ability of CIMMYT's tropical late white maize germplasm. Maydica 37: 217-223. Vasal, S.K., G. Srinivasan, J. Crossa and D.L. Beck. 1992b. Heterosis and combining ability of CIMMYT's subtropical and temperate early-maturity maize germplasm. Crop Sci. 32: 884-890. Vasal, S.K., G. Srinivasan, J. Crossa and D.L. Beck. 1992c. Heterosis and combining ability of CIMMYT's tropical x subtropical maize germplasm. Crop Sci. 32: 1483-1489. Vasal, S.K., G. Srinivasan, S. Pandey, H.S. COrdova, G.C. Han and F. Gonzalez C. 19~2d. Heterotic patterns of ninety-two white tropical CIMMYT maize lines. Maydica 37: 259 270. Vasal, S.K., G. Srinivasan, G.C. Han and F. Gonzalez C. 1992e. Heterotic patterns of eighty-eight white subtropical CIMMYT maize lines. Maydica 37: 319-327. Vasal, S.K., G. Srinivasan, S. Pandey, F. Gonzalez C., J. Crossa and D.L. Beck 1993a. Heterosis and combining ability of CIMMYT's quality protein maize germplasm: I. Lowland tropical. Crop Sci. 33: 46-51. Vasal, S.K., G. Srinivasan, F. Gonzalez C., D.L. Beck and J. Crossa. 1993b. Heterosis and combining ability of CIMMYT's quality protein maize germplasm: II. Subtropical. Crop Sci. 33: 51-17. Questions to the author: FROM: S. J. Patil Q How can the heterotic pattern be identified? What should be the base materials (testers)? A The heterotic patterns can be identified through several ways using special mating designs such as diallels, design-2 mating, etc. Once heterotic patterns of potentially useful materials are determined, these then can be used as testers to determine their relationship with other materials. FROM: C. Chutkaew Q Breeding corn for industrial use, e.g. protein, oil, popping quality, sweet-corn, young ear corn, what will be your recommendations on breeding procedures? A Recurre~t selection procedures in general have been quite effective in increasing protein content and oil content. In other specialty corns such as popcorn and sweet corn, recurrent selections procedures will also be useful to correct deficiencies, provided populations are homozygous for gene(s) which control specialty. corn character. I have no experience with baby corn but would expect prolificacy, early maturity, along with hybrid development important considerations for economical reason and to have high uniformity. 201
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Proceedings of the Fifth Asian Regi
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Page Foreword List of participants
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For several years, the Asian countr
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LAOS MALAYSIA MYANMAR NEPAL PAKISTA
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Chamnan Chutkaew Dept. of Agronomy
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I t· PRIVATE PRIVATE SECTOR: SECTO
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Pioneer Overseas Corp. ProAgro Seed
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MP COP NGOs TK = Muriate of Potash.
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Table 3. Land suitability for maize
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Depending on how this wheat is rele
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Individual field sizes in the GKF a
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Table 12. Demonstration block resul
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alance of composite, synthetics and
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Elias, S.M., F.S. Sikder and J.Ahme
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~IZE ItAIMJ4ENT PRXJW4ME IN IHlf'AN
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3. Low level of soil fertility. Exp
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3. Farmers could not afford to purc
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Table 1. Hybrid maize production in
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100,000 mu (1 ha = 15 mu). Fran 198
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+ The planting area of inbred line
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ty levels. Selection interia should
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Dao13, Oa19, SSE232 etc.). b. combi
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~ZE I~ IN IN>IA - AN OVERVIEW WITH
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inbred 1ines possessing good genera
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Table 3. Details of medium and earl
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increasing the yield levels of the
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Production of ~zygous diploid inbre
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EntQllOlogical research. In the fie
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A 1) OUr coordinated efforts for ma
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Table 1. Maize area harvested, proW
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Table 4. Grain yield of Semar 1 and
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ut they have been selecting ears fr
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MAIZE ~ N«J ~ION IN LAOS. Kanyavon
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to rice in order to reach self-suff
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0\ 0\ ."'0- ~I.u'. u: 0 50 100 STAT
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. According to the findings of the
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IR:EDIIIG IHJ N:RHJotIC RESEAfDI C
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tion with estate or mini-estate typ
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Table 4. MYR grain maize yields ove
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techniques. References Anonymous. 1
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Table 1. Total area under maize and
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Year Township Area planted Total pr
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cover, short plant stature, and sat
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Table 3. Res.Stat. Multilocational
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3. Plant protection: a. Diseases Th
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Questions to the author: FROM: S. K
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were unacceptable in some parts due
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Table 2. CCRI maize hybrid yield tr
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HYBRID MAIZE BREEDlt.G AN> ALH»DII
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of highly productive technologies,
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Maize varietal improvement continue
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Peronosc lerospora phi 1ippinensis
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elow to help clarify the farm level
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Premium Grade (emulsifiable concent
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support. The versatile planter/fert
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Table 1. Climatic conditions in the
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T1l1t:i----------------------------
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the maha season. Yala season is cha
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. Spacing Blackgram Maize 40 em x 5
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Sri Lanka. Ariyanayagam, R. P. 1967
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It took almost 10 years to develop
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g; CUS0 4 (5H 2 0): 0.39 g; NaF: 0.
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3. Making single cnosses: Plant the
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experiments showed that the fertili
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Long term evaluation of mass releas
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Chang, S.C., and Y.Z. Wu. 1976. Pra
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DEVELCHENT OF HYBRID ~ IN THAILAN>
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Table 2. Quantity and value of Thai
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was approved by KU and OOA in 1991
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Table 8. Mean yields of fresh dehus
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4. Prevention and control of aflato
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Table 17. Mean grain yield and agro
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Sittipanuwong, S., C. Chutkaew, A.
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Early rainy season plantings have a
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P. R.CHINA TMilAKD CAMPUCHiA
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In 1992, the hybrid maize acreage i
Page 156 and 157: organizing visits as well as field
Page 158 and 159: Table 1 Area, production and yield
Page 160 and 161: plants per hill) 4. Intercropping e
Page 162 and 163: VIEl1'W4 YELLOW MAIZE EXRRT: MARKET
Page 164 and 165: 6,------------------~3,5 Producllon
Page 166 and 167: MAIZE BREEDUG Arnel R. Hallauer-L!
Page 168 and 169: method was provi ded by Eberhart (1
Page 170 and 171: can vary by the complexity of inher
Page 172 and 173: Table 3. Response to selection for
Page 174 and 175: Table 5. Comparative responses for
Page 176 and 177: increased response for grain yield.
Page 178 and 179: Sure Crop (0h43 and C103). several
Page 180 and 181: Sprague and Tatum (1942) demonstrat
Page 182 and 183: Horner, E.S., E. Magloi re, and J .
Page 184 and 185: evaluation are conducted in only on
Page 186 and 187: Table 1. Maize: Production Unit 100
Page 188 and 189: Table 3. Maize: Area harvested Unit
Page 190 and 191: v) Incentives to private sector are
Page 192 and 193: possible through adoption of suitab
Page 194 and 195: will be described highlighting thos
Page 196 and 197: will fluctuate. As a general rule,
Page 198 and 199: help of maize breeders from the nat
Page 200 and 201: Table 4. Possible heterotic partner
Page 202 and 203: use as OPVs and broad based synthet
Page 204 and 205: c. Integrat;on of populat;on ;mprov
Page 208 and 209: HYBRID MAIZE ~ 1l£ SMALL-SCALE FNI
Page 210 and 211: Table 2. Growth rate of maize area
Page 212 and 213: At the same time that CIMMYT was sh
Page 214 and 215: when grown under farmers' condition
Page 216 and 217: seed often varies substantially bec
Page 218 and 219: kilograms of maize grain that must
Page 220 and 221: Table 8. COst of producing, process
Page 222 and 223: case in which the hybrid replaces a
Page 224 and 225: J i-----1'-_.,-_I........ i M*iIBia
Page 226 and 227: egions which do not allow a suffici
Page 228 and 229: participation; where foreign compan
Page 230 and 231: Wellhausen, E.J. Walden (ed.) 1978.
Page 232 and 233: To recover value, seed companies ca
Page 234 and 235: In recent years, many new companies
Page 236 and 237: nology and its reliance on patents,
Page 238 and 239: Table 6. Intellectual property righ
Page 240 and 241: for crop improvement programs. It i
Page 242 and 243: capabi 1ities Despite these constra
Page 244 and 245: TftNlAlll CAMPUCI-1iA Fig. 1. Seven
Page 246 and 247: * Yield potential of 8.0 t/ha. II.
Page 248 and 249: CAOOILL MAIZE RESEAFDI ACTIVITIES I
Page 250 and 251: RESEARCH AN> POTENTIAL OF HYBRID (X
Page 252 and 253: ClBA SEEDS IN SJJ11£AST ASIA. Jose
Page 254 and 255: ACTIVIlY OF MAHYOO IN INJIA Rajendr
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PACIFIC SEEDS - PlANT ~ FOO ASIA Pe
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Questions to the author: FROM: R. S
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Just start In 1980 the demonstratio
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VOLUME 1000 IQnt/ 10.--------------
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(Notes by Dr. V.L. Chidley, Raporte
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1. Rhizoctonia leaf and sheath blig
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