Identification of maintainer and restorer lines in local aromatic Rice (Oryza sativa)

Abstract

The availability of stable cytoplasmic male sterility and fertility restoring system is vital for commercial exploitation of heterosis in rice. The experiment was conducted to identify stable maintainers and restorers for three CMS lines having wild abortive type sterility inducing genes in local rice germplasm. One hundred and twenty nine test crosses were made by using 43 aromatic rice genotypes and three CMS lines. Pollen sterility and spikelet fertility of the raised Six crosses were identified as complete sterile and seven as full fertile for the said combination. In case of IR68885A four crosses were found as complete sterile, and a single cross as full fertile. The local aromatic line, Kalijira-9 and Sorukamini were identified as maintainer for IR68885A which was common with IR58025A. The local aromatic line Benaful was identified as restorer for IR58025A and IR62829A.

Identification of Elite Restorers and Maintainers in Rice (Oryza sativa L.) Based on Pollen Fertility and Spikelet Fertility Studies

“…The pollen fertility percent of hybrids were varied from 39.60% to 88.00% and spikelet fertility ranged from 48.58 to 93.5%. Similar observations have been reported by other researchers (Ali et al 2014, Krishnalatha and Sharma 2012. This variation may be due to the pollen fertilityrestoring genes differ or their penetrance or expressivity differed with genotypes (Umadevi et al, 2010) or due to existence of modifiers genes.…”

Spikelet Fertility Restoration Studies for Identification of Restorers and Maintainers in Rice (Oryza sativa L.)

“…Similar observations have been reported by other researchers (Ali et al, 2014, Krishnalatha and Sharma 2012and Srijan et al, 2015.…”

Assessment of Environmental Effect on Fertility Restoration in Sweet Pepper (Capsicum annum L. var. grossum)

“…Based on mean performance, the pollen fertility was ranged from 95.67 % to 51.60% across the locations. Similar results were also reported by Ali et al, 2014 in rice crop. Higher the pollen fertility implies high fertility restoration and vice-versa.…”