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

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synthetics/composites/hybrids. A synthetic has recently been developed from IITA inbred lines and is in the process of being released. Recently, a few maize development agencies in Bangladesh, including BAAl, Dept. of Agric. Extension, Bangladesh Agric. Developmt. Corp., IFDC and the COP, have studied the prospects of hybrid maize cultivation in Bangladesh. During rabi 1992-93, COP imported Pacific 11, a hybrid maize variety from Thailand for cultivation on an experimental and demonstration basis (Table 7). Besides, IFDC and some toms and private seed companies also imported hybrid maize seeds during rabi 1992-93. The area under maize cultivation during rabi 1992-93 is shown in Table 8. Table 7. Maize area under the crop diversification program of the DAE, 1'GJs, and private growers excluding GKF. Rabi 1992-1993. Agency District Area Yield Production (ha) (t/ha) (t) DAE Bogra 8.09 3.71 30.01 Privatell 40.49 6.18 250.23 DAE (rabi) Rajshahi 19.43 3.71 72.09 (kharif*)ll! 4.86 4.94 24.01 DAE Magura 8.09 3.71 30.01 DAE Meherpur 8.09 3.71 30.01 tom ( ETDA)y 2.02 6.18 12.48 1m (ETDA)D Chuadanga 2.02 6.18 12.48 DAE Jessore 7.29 3.71 27.05 TOTAL 100.38 488.37 Notes: JJ Pacific 11 and some Cargill hybrids were grown. JJ MS 999, a synthetic var. from Thailand was grown. Table 8. Organization, location and area under hybrid maize cultivation with s~ed delivery and use. Rabi 1992-93. Organ; zation GKF Fertilizer dealer (private farmers) DAE ETDA-(a 1m) TOTAL % Area (ha) Seed use (kg) Location Hybrid Composite Hybrid composite Greater 405 202 8,500 8,000 Rangpur District Bogra 40 800 Jessore, 2 49 40 1,200 Magura, Meherpur, Raj - shahi, Bogra Chuadanga 4 Meherpur 451 251 9,340 9,200 64 36 50 50 16
Individual field sizes in the GKF area ranged from 4.05 to 8.10 ha. In addition to the hybrid and composite maize varieties indicated above, there were about 28.34 ha of baby corn and popcorn in the GKF area. The majority of the harvest took place from mid-April to mid May. After drying and shelling, the harvest became available in mid-April, or 190 days after planting. The area and production in the GKF zone is shown in Table 9. Table 9. Maize area and production managed by GKF in the Greater Dinajpur and Rangpur Districts. Region Total area Area under hybrids Yield Production (ha) and composites (ha) (t!ha) (t) Kurigram 68.82 Hybrid 50.20 6.17 309.73 Composite 18.62 3.70 68.89 Rangpur 50.20 Hybrid 48.58 6.17 299.73 Composite 1.61 3.70 5.96 Dinajpur 110.12 Hybrid 73.28 6.17 452.13 Composite 36.84 3.70 136.31 Birganj 102.43 Hybrid 59.92 6.17 369.11 Composite 42.51 3.70 157.29 Thakurgaon 82.59 Hybrid 70.04 6.17 432.15 Composite 12.55 3.70 46.43 'Birampur 97.16 Hybrid 75.30 6.17 464.60 Composite 21.86 3.70 80.88 Gaibanda 22.26 Hybrid 21.86 6.17 134.88 Composite 0.40 3.70 1.48 TOTAL 533.60 Hybrid 399.19 6.17 2462.93 Composite 134.41 3.70 497.24 Since 1989, leI Seed International has been testing the hybrids Pac. 10 and Pac.ll. These yielded only slightly over 5 t/ha, although yields of over 12 t/ha were expected. Results of the block and plot demonstrations by the IFDC during kharif 1991 are presented in Table 10. Results obtained by IFDC in plantings done in 1991-92 using 10 hybrids and 2 composite varieties showed that all the hybrids outyielded the composites (Table 10). Each variety was grown in 450 m 2 plots. Although it has been shown that Barnali yields 3.60 t/ha (Table 11), results showed that Barnali yielded 4.6-5.9 t/ha over locations and years (Table 12). The potential for maize in Bangladesh can be qualified by reviewing recent past results of maize trials conducted by IFDC and BARI. Some of these results are presented,in Table 13. The indications are that a hybrid like Pacific 11 gives a higher yield than the registered composite Barnali in both rabi and kharif seasons. In rabi, the superiority was 8~ (Pac 11; 6.7 t/ha, Barnali: 3.6 t/ha) and in kharif it was ~ (Pac 11: 4.3 t/ha, Barnali: 2.9 t/ha). The performance of other hybrids indicated that the yield superiority over Barnali was less. During rabi 1990-91, fertilizer rate trials of hybrid maize were conducted at six locations. The results indicate that by using 1.5 times the recommended doses of fertilizer, yield of the composite varieties were on average 4.98 t/ha. By adding triple the normal dosage, yields of up to 6.37 t/ha were obtained with composites (Table 14). This high fertilizer dose will be generally beyond the reach of common farmers. However, this yield is only 0.7 times greater than the highest yield of SUwan 2 (Kharif 1991) and only 0.12 times higher than that of Barnali (5.7 t/ha) for rabi 1990-91. Here, it is important to indicate that by using the fertilizer level recommended for the rabi season, Barnali yielded higher than the hybrids (Table 12 and 16). 17
Page 2 and 3: Proceedings of the Fifth Asian Regi
Page 4 and 5: Page Foreword List of participants
Page 6 and 7: For several years, the Asian countr
Page 9 and 10: LAOS MALAYSIA MYANMAR NEPAL PAKISTA
Page 11 and 12: Chamnan Chutkaew Dept. of Agronomy
Page 13 and 14: I t· PRIVATE PRIVATE SECTOR: SECTO
Page 15 and 16: Pioneer Overseas Corp. ProAgro Seed
Page 17 and 18: MP COP NGOs TK = Muriate of Potash.
Page 19 and 20: Table 3. Land suitability for maize
Page 21: Depending on how this wheat is rele
Page 25 and 26: Table 12. Demonstration block resul
Page 27 and 28: alance of composite, synthetics and
Page 29 and 30: Elias, S.M., F.S. Sikder and J.Ahme
Page 31 and 32: ~IZE ItAIMJ4ENT PRXJW4ME IN IHlf'AN
Page 34 and 35: 3. Low level of soil fertility. Exp
Page 36 and 37: 3. Farmers could not afford to purc
Page 38 and 39: Table 1. Hybrid maize production in
Page 40 and 41: 100,000 mu (1 ha = 15 mu). Fran 198
Page 42 and 43: + The planting area of inbred line
Page 44 and 45: ty levels. Selection interia should
Page 46 and 47: Dao13, Oa19, SSE232 etc.). b. combi
Page 48 and 49: ~ZE I~ IN IN>IA - AN OVERVIEW WITH
Page 50 and 51: inbred 1ines possessing good genera
Page 52 and 53: Table 3. Details of medium and earl
Page 54 and 55: increasing the yield levels of the
Page 56 and 57: Production of ~zygous diploid inbre
Page 58 and 59: EntQllOlogical research. In the fie
Page 60 and 61: A 1) OUr coordinated efforts for ma
Page 62 and 63: Table 1. Maize area harvested, proW
Page 64 and 65: Table 4. Grain yield of Semar 1 and
Page 66 and 67: ut they have been selecting ears fr
Page 68 and 69: MAIZE ~ N«J ~ION IN LAOS. Kanyavon
Page 70 and 71: to rice in order to reach self-suff
Page 72 and 73:
0\ 0\ ."'0- ~I.u'. u: 0 50 100 STAT
Page 74 and 75:
. According to the findings of the
Page 76 and 77:
IR:EDIIIG IHJ N:RHJotIC RESEAfDI C
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tion with estate or mini-estate typ
Page 80 and 81:
Table 4. MYR grain maize yields ove
Page 82 and 83:
techniques. References Anonymous. 1
Page 84 and 85:
Table 1. Total area under maize and
Page 86 and 87:
Year Township Area planted Total pr
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cover, short plant stature, and sat
Page 90 and 91:
Table 3. Res.Stat. Multilocational
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3. Plant protection: a. Diseases Th
Page 94 and 95:
Questions to the author: FROM: S. K
Page 96 and 97:
were unacceptable in some parts due
Page 98 and 99:
Table 2. CCRI maize hybrid yield tr
Page 100 and 101:
HYBRID MAIZE BREEDlt.G AN> ALH»DII
Page 102 and 103:
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
Page 132 and 133:
Long term evaluation of mass releas
Page 134 and 135:
Chang, S.C., and Y.Z. Wu. 1976. Pra
Page 136 and 137:
DEVELCHENT OF HYBRID ~ IN THAILAN>
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Table 2. Quantity and value of Thai
Page 140 and 141:
was approved by KU and OOA in 1991
Page 142 and 143:
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
Page 148 and 149:
Sittipanuwong, S., C. Chutkaew, A.
Page 150 and 151:
Early rainy season plantings have a
Page 152 and 153:
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
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
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6,------------------~3,5 Producllon
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MAIZE BREEDUG Arnel R. Hallauer-L!
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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
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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
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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
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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
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Table 8. COst of producing, process
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case in which the hybrid replaces a
Page 224 and 225:
J i-----1'-_.,-_I........ i M*iIBia
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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
Page 266:
1. Rhizoctonia leaf and sheath blig
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