Identification of Potential Maintainer and Restorer Lines from Elite Germplasm of Rice

Author: Vikas Mangal*, M.K. Nautiyal, Leela Bhatt, Nidhi Bhatt and D.C. Baskheti

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Abstract

The present investigation was conducted for the identification of potential restorers and maintainers from the elite germplasm of rice. Cytoplasmic-genetic male sterility (CGMS) system used predominantly in rice for hybrid seed production which requires three lines A (male sterile), B (maintainer line) and R (restorer line). Sometimes it is very difficult to develop hybrids locally by using imported CMS lines from another country. So identification of effective maintainer and restorer lines from local germplasm is a prerequisite before starting hybrid seed production in rice. In the present investigation, four CMS lines were crossed with 23 genotypes as ‘testers’ to get 92 F1. The 92 F1 were subjected to spikelet fertility analysis. The spikelet fertility was ranged from 0 per cent (Pant CMS 3A × UPR 3807-1-6 and Pant CMS 3A × UPR 3807-1-1) to 83.61 per cent (IR 58025 A × UPR 3506-1-2). Among the 92 F1, 7 F1 were expressed as fully fertile, 2 complete sterile, and 83 intermediat

Keywords

Cytoplasmic-genetic male sterility, fully restorer, fully maintainer, heterosis.