Hybrid rice research in Indonesia

At present, IR62829A and IR29744A are the most promising CMS, both highly uniform and stable in terms of sterility, but they are susceptible to bacterial blight. Most of the latest CMS lines introduced (IR64608A, IR64607A, KrishnaA, PragathiA, and IR66707A) show high sterility and have some good agr...

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Main Authors Suprihatno, B, Sutaryo, B, Silitonga, T.S. (Sukamandi Research Inst. for Food Crops, Jl. Raya 9, Sukamandi Sabang (Indonesia))
Format Conference Proceeding
LanguageEnglish
Published Los Banos, Laguna (Philippines) IRRI 1994
Subjects
CARACTERE AGRONOMIQUE
CARACTERISTICAS AGRONOMICAS
CONTROL DE PLAGAS
DESCENDANCE
ESTERILIDAD MASCULINA CITOPLASMICA
HIBRIDOS
HYBRIDE
INDONESIA
INDONESIE
INVESTIGACION
LUTTE ANTIRAVAGEUR
ORYZA SATIVA
PROGENIE
RECHERCHE
RENDEMENT DES CULTURES
RENDIMIENTO DE CULTIVOS
RESISTANCE AUX MALADIES
RESISTENCIA A LA ENFERMEDAD
STERILITE MALE CYTOPLASMIQUE
VIGOR HIBRIDO
VIGUEUR HYBRIDE
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Summary:At present, IR62829A and IR29744A are the most promising CMS, both highly uniform and stable in terms of sterility, but they are susceptible to bacterial blight. Most of the latest CMS lines introduced (IR64608A, IR64607A, KrishnaA, PragathiA, and IR66707A) show high sterility and have some good agronomic traits. Several new Indonesian CMS lines, IR9774A, IR19809A, Tondano A, and M8601A, are being developed. Yield trials conducted during 1980-85 gave standard heterosis for yield ranging from 3.3 to 60.8 percent, with an average of 22.1 percent. Hybrids were generally earlier than the best check, and standard heterosis for productivity per day ranged from 3.0 to 91 percent, with an average of 44.7 percent. Hybrid yield advantage was due primarily to more spikelets per panicle and greater 1,000-grain weight. The hybrids, however, were all derived from Chinese CMS lines, which were found to be highly susceptible to most insects and diseases. Yield trials conducted during 1986-91 showed that in all F1 hybrids using IR54752A, there were many sterile plants due to instability. Therefore, using IR54652A for hybrid development was stopped. Hybrids from combinations using IR62829A and IR29744A seemed to be quite promising. IR62829A has shown outcrossing rates of -+ 17.0 percent. Techniques of hybrid seed production developed in China are being adapted to Indonesian conditions, At present, sources of dominant genes for resistance to BPH [brown planthopper] biotype 3 and stem borer in restorers are very limited. This hinders progress in developing good F1 hybrids for Indonesia
Bibliography:9510425
F30
A50
ISBN:9789712200533
9712200531