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

Future of hybrid com program
1. Hybri d com research.
Hybrid corn research and development programs include the following activities:
a. Inbred line development.
b. Combining ability testing.
c. Inbred line seed increase.
d. Production of F1 seed.
The Agric. Res. Div. of the Ministry of Agric. is the institution responsible for the
development of inbred lines and their increase. The seed increase program of inbred lines with
good combining ability is described below:
Year
Region
Area planted
(ha)
Production
1992-93
1993-94
1994-95
1995-96
Yezin
Yezin
Yezin
Yezin
0.4
0.8
1.6
2.0
1200
2400
4800
6000
"-
2. Hybrid seed production p~
The crossing blocks including tne staggered planting of male and female lines in 1:3 ratio,
are established at Tatkon and Chaung Ma Gyi Seed Farms, under the Seed Div. of the Ministry of
Agric. Detasseling of the female rows is done manually. The hybrid seeds production program for
1992-93 to 1995-96 is as follows:
Year Region Area planted Total product Seed production
(ha) (t) (ha)
1992-93 Yezin 1.2 1.5 60
1993-94 Tatkon 2.0 25.0 1000
1994-95 Tatkon 2.0 25.0 1000
Chang Ma Gyi 2.0 25.0 1000
1995-96 Tatkon 2.0 25.0 1000
Chang Ma Gyi 2.4 30.0 1200
Lun Kyaw 2.8 35.0 1400
3. Hybrid com substitution program.
Hybrid corn is mainly targeted for those areas in Myanmar where farmers obtain a yield
plateau with the open pollinated varieties and-where agronomic constraints are no longer a yield
limiting factor. To replace OPVs with hybrid corn on successive steps in two townships, Lewe and
Pyinmana, selected areas are planted to hybrids as follows:
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