Results of the hybrid rice research and development in Vietnam during 1992-2004
2005
Nguyen Tri Hoan
The hybrid rice research and development in Vietnam was started by introduction new hybrids as well as parental materials for evaluating in Vietnam. The parental line such as BoA 25A, II 32A and coressponding B lines, restorer lines were purified and muntiplied for F1 seed production in Vietnam. The F1 seed production technology was also stadies first for adapted hybrids introduced from China Viz. Boyou 64, Boyou 903, Nhi uu 63, and later for new developed hybrids VL20, HYT57, HYT83, TH3-3. Sevaral F1 seed packages were released for commecial application. Having parental seed produced in Vietnam and F1 seed production packages were established, Vietnam could produced 1500 - 1700 ha of hybrid rice seed with hybrid seed yield average ranged from 2000 to 2400 kg per ha. The new parental lines and new CMS lines were developed. Also several new rice hybrid were developed and released for commecial hybrid rice production. With 600000 ha of hybrid rice per year having 1.5 - 2 ton/ha of yield advantage over inbred check, hybrid rice contivation ensured food security of several province in North and Cental of Vietnam.
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