Indian Society of Genetics & Plant Breeding

Studies on environmental conditions and pollination management in hybrid rice seed production

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In order to understand the effect of environmental
conditions in development of hybrid seed production
technology of Pusa Rice Hybrid 10 (PRH-10), an
experiment was conducted in the Indian Agricultural
Research Institute, New Delhi during 2005. The results
indicated that in hybrid seed production of PRH-10,
application of GA3 @ 90g/ha and two time supplementary
pollinations at 10:30 hrs and 11:30 hrs in a favourable
condition during flowering period would give the highest
hybrid seed yield upto 4.2 tons/ha. Most favourable
ecological conditions for maximizing hybrid rice seed
production were temperature ranging from 18.6-34.5 oC,
relative humidity ranging from 34-91%, mean sunshine as
9.5 h/day and mean wind velocity of 4.1 km/hr during the
flowering period. Higher hybrid seed germination and
seedling vigour were recorded in seeds produced under
favourable condition than that under unfavourable
condition. Incidence of seed borne fungi was higher in
seed lots with higher dose of GA3 application and in seeds
produced under unfavourable growing conditions.

Keywords: Environmental parameters, seed set, seed yield, germination, seedling vigour, seed health, hybrid seed production


Year: 2008
Volume: 68
Issue: 4
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906


S. K. Chakrabarty, S. P. Sharma and M. Dadlani info_circle

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