Hybrid seed production mechanisms in rice (Oryza sativa L.) 

                                                                                   Rajesh Singh

                                                   Genetics and Plant Breeding, IAS, BHU, Varanasi-221005

Received: 23 April 2012                      Revised Accepted: 30 May 2012

ABSTRACT

Commercial development of hybrid rice depends on the availability of high quality seed, which can come about only through improved hybrid seed production techniques.     Improved technique has to depend on its basic tools; improved male sterility, its maintenance and fertility restoration system. Rice being strictly self pollinated crop, to  achieve high outcrossing potential on cytosterile lines is a serious challenge to hybrid rice breeders. High and true to type outcrossing will depend on strict isolation of seed production areas, through roguing of off-type plants and rigid operating rules can help to achieve required seed purity. In this review of literature the factors that control hybrid seed production mechanism in rice are discussed.

 Key Words: Cytocterile lines, Heterosis, Maintainers, Rice, Resotrers, Seed production mechanism