National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Hybrid technology in many crops has contributed 20-30 per cent increase in the production and exploitation of heterosis through the development of F1 hybrids which has been recently deployed in rice with yield advantage of 20-25 per cent over best pure lines. The main aim of any plant breeding programme is to develop special high yielding hybrids and success of any plant breeding programme depends on the choice of appropriate genotypes as parents in the hybridization programme. To accomplish this, the breeding programme can efficiently be planned with prior knowledge of the genetic makeup of parental genotypes whether they are sterile or complete restorer. Eighty-four rice genotypes (F1 crosses) were selected for identification of fertility restoration for five CMS lines with WA cytoplasm. F1 crosses were analysed for pollen fertility and spikelet fertility and were classified into four classes viz, complete maintainer, partial maintainer, partially restorer and fully restorer. Out of 84 F1 hybrids, 13 lines were completely fertile and 5 completely sterile. The remaining 66 hybrids expressed varying degrees of fertility (both pollen and spikelet). Forty-nine of them were partial maintainers and the remaining seventeen were partial restorers (based on spikelet fertility).
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