Proceedings of the Fifth Asian Regional Maize Workshop - Search ...

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seed often varies substantially because of differences in net seed yield. For example, in Mexico an important factor determining net seed yields is the pnoportion of usable seed, since varying amounts of seed of unacceptable size must be discarded (Table 5). the costs which _t be covered by the price of hybrid seed. If hybrid seed is produced fran inbred 1ines developed by the publ ic sector J research and development costs do not have to be ref1ected in the price of seed.JJ Likewise, if hybrids are pranoted extensively through public sector extension programs, marketing and pranotion costs bome by private canpanies are generally low. Table 5. seed yield of parent inbreds, single-cross parents, and canmercial double-cross hybrid in Mexico, 1991. Gross seed Net seed Net seed yield, yield yield Par.,t lines (t/ha) (t/ha) (tI) M15* 2.33 0.13 5 M16 2.27 0.32 14 M17* 2.48 0.39 16 M1S 2.36 1.04 44 M17 x M1S* 0.67 0.54 80 M15 x M16 5.S6 2.00 34 OC-rcial hybrid (t/ha) (t/ha) (tI) 1+-2S** 6.50 4.73 73 Source: Lopez-Pereira and Espinosa C. (1993). • Male parent of cross• *. (M17 x M1S) x (M15 x M16). the structure and
NIt.'" .......... s-I '!)po'" ..,... ........ - s-I e-'lIIIloa ....... - ("-,,,"-l 1'IIIIIIc_ ....D ...". .......... ....- ........... - s-I..... ........... ...... - PIIIlIe_ --- ..- ~.. - o.no.I -- .. ....-..- Fig. 5. Factors influencing the market price of hybrid maize seed. 30 ......-----------------:U:":'S="A':""""I'---..., 20 - t Highest Average Lowest Mexico s p to-tnlD rallo Mexico Philippines Fig. 6. 10 - Nigeria Brazil Brazil f + + Colombia Guatemala IJidia Pakisl8ll PakiSl8ll Pakistan 0 I I I I I I Top Doobho Thn....y s..... Source: CIYIIYT (1887) ....... ........ ........ - .... - - 100...... YIrl.IIII OPV. hylo'" Maize seed-to-grain price ratios, by seed type. 211
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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
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organizing visits as well as field
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Table 1 Area, production and yield
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plants per hill) 4. Intercropping e
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VIEl1'W4 YELLOW MAIZE EXRRT: MARKET
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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 206 and 207: Table 8. Announced CIMMYT lines 199
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 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
Page 256 and 257: PACIFIC SEEDS - PlANT ~ FOO ASIA Pe
Page 258 and 259: Questions to the author: FROM: R. S
Page 260 and 261: Just start In 1980 the demonstratio
Page 262 and 263: VOLUME 1000 IQnt/ 10.--------------
Page 264 and 265: (Notes by Dr. V.L. Chidley, Raporte
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1. Rhizoctonia leaf and sheath blig
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