Marker-assisted improvement of the elite maintainer line of rice, IR 58025B for wide compatibility (S5(n)) gene

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dc.creatorPriyadarshi, Rahul
dc.creatorArremsetty, Hari P. S.
dc.creatorSingh, Akhilesh K.
dc.creatorKhandekar, Durga
dc.creatorUlaganathan, Kandasamy
dc.creatorShenoy, Vinay
dc.creatorSinha, Pallavi
dc.creatorSingh, Vikas K.
dc.date2018-07-20
dc.date2024-12-19T12:54:21Z
dc.date2024-12-19T12:54:21Z
dc.date.accessioned2026-06-27T04:15:53Z
dc.descriptionThe degree of heterosis in different hybrid rice varieties is reported to be at the highest in indica/japonica cross combination, however, there is a problem of sterility and semi-sterility in such inter sub specific hybrids. To overcome this problem, it is essential to develop parental lines having wide compatibility (S5(n)) gene. In this study, a functional marker S5-InDel was used for marker-assisted backcrossing (MABB) to introgress S5(n) gene from Dular into the genetic background of a widely grown recurrent parent IR 58025B, a maintainer line of wild-abortive (WA) cytoplasmic male sterile line, IR 58025A. Further, a closely linked marker nksbadh2 was used for the identification of plants devoid of aroma in backcross population to develop hybrids with no aroma. The stringent phenotypic selection followed by background selection of BC3F4 identified plants with 94.51-98.90% of the recurrent parent genome recovery of lines carrying S5(n) gene. Subsequently, at 10 promising BC3F5 lines possessing S5(n) gene with high yielding and long-slender grain type were validated for their maintainer behavior through test crosses with IR 58025A. Also the improved lines showed significantly improved spikelet fertility performance while crossed with japonica and javanica testers in comparison to the original recurrent parent. The improved lines developed in the present study, are being converted to CMS lines through marker-assisted backcross breeding to facilitate precise and improved hybrid breeding program in rice.
dc.identifierhttps://hdl.handle.net/10568/164833
dc.identifier.urihttp://hdl.handle.net/123456789/27017
dc.languageen
dc.publisherFrontiers Media
dc.rightsOpen Access
dc.sourcePriyadarshi, Rahul; Arremsetty, Hari P. S.; Singh, Akhilesh K.; Khandekar, Durga; Ulaganathan, Kandasamy; Shenoy, Vinay; Sinha, Pallavi and Singh, Vikas K. 2018. Marker-assisted improvement of the elite maintainer line of rice, IR 58025B for wide compatibility (S5(n)) gene. Front. Plant Sci., Volume 9
dc.subjectbackcrossing
dc.subjectbreeding programmes
dc.subjectgenetic markers
dc.subjectgenetic parameters
dc.subjectgenomes
dc.subjectheterosis
dc.subjectphenotypes
dc.subjectplant breeding
dc.subjectspikelets
dc.subjectvarieties
dc.subjectyields
dc.titleMarker-assisted improvement of the elite maintainer line of rice, IR 58025B for wide compatibility (S5(n)) gene
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)