Indian Society of Genetics & Plant Breeding

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ISOLATION AND CHARACTERIZATION OF A REVERSE TEMPERATURE SENSITIVE GENIC MALE STERILE MUTANT IN RICE

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A spontaneous male sterile mutant isolated from a farmer's field at Katrain, Himachal
Pradesh during early kharif « 24°q when stubble-planted at Delhi under high
temperature (> 300q condition set seeds indicating thus its temperature-influenced
behaviour of sterility-fertility alteration. Physiological. characterization of the mutant
designated as JP 38 5 under natural and controlled growth chamber conditions has
revealed its critical sterility and fertility points to be 24°C and 30.s°C respectively.
Critical stage of sensitivity to temperature is 16 days before heading. The mutant
source, representing a reverse form of the widely known normal temperature sensitive
genic male sterility (TGMS), that remains sterile at high temperature and turns fertile
at low temperature will be as much valuable as that of the latter in commercial hybrid
seed production in the hills with low temperature and seed multiplication of JP 38 5
in the plains with high temperature.
 

Keywords: Rice, hybrid, male sterility, reverse temperature sensitive male sterility, characterization, critical sterility point, critical fertility point, seed production

Info

Year: 1999
Volume: 59
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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