volume 37 issue 4 (december 2003) : 259 - 263
FERTIUTY RESTORATION BEHAVIOUROF PROMISING CMS UNES IN RICE (ORYZ4 SATIVA L.)
1Department of Rice,
Tamil Nadu Agricultural University, Coimbatore - 641003, India
ABSTRACT
About 291, short, medium, long duration indica cultivars, japonica and IRRI restorers were crossed with six CMS lines derived from wild abortive cytoplasm viz., IR 58025 A, IR 68888A, IR 68897 A, IR 68281 A, IR 69616 A, PMS 3 A, to identify effective restorers and potential maintainers. Based on pollen/spikelet fertility, 30.4 per cent of the male parents were identified as effective restorers and 13.7 per cent of the male parents were identified as potential maintainers and the rest were grouped into partial restorers and partial maintainers. Thirteen hybrid combinations were identified as promising based on standard heterosis for yield ranging from 18.5 per cent to 40.0 per cent. The hybrid IR 58025 A/IR 60821-34-1-2 R recorded the highest standard heterosis of 40.0 per cent followed by IR 58025 A/IR 8666-30-3-1-4 R (39.5 per cent), IR 58025 MC 10 R (35.6 per cent), IR 69616 A/IRRI 3054 (29.6 per cent) and IR 68888 MR 4595-54-1 R (28.4 per cent).Indian Journal of Agricultural Research
KEYWORDS
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Indian Journal of Agricultural Research
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