Dr. Subhash N.F.S.Patel2018-01-012018-01-012016http://krishikosh.egranth.ac.in/handle/1/5810038579Rice (Oryza sativa L.) is one of the most important cereal crops in the world. Cytoplasmic male sterility (CMS), a maternally inherited trait failing to produce functional pollen, is a useful for production of hybrid seeds in crops. In rice (Oryza sativa L.), several types of CMS lines were defined by different sources of sterile cytoplasm with distinct genetic features have been identified. CMS-WA/Rf, have been widely used for hybrid rice seed production using the three-line (CMS, maintainer and restorer) technology. Hybrid rice varieties usually increase yields by about 20%.enAgricultural BiotechnologyAnalysisThesis