Abstract
Inheritance of fertility restoration was studied in crosses involving ten elite restorer lines of rice viz. BR6839-41-5-1R, BR7013-62-1-1R, BR7011-37-1-2R, BR10R, BR11R, BR12R, BR13R, BR14R, BR15R and BR16R and one male sterile line Jin23A with WA sources of cytoplasmic male sterility. The segregation pattern for pollen fertility of F2 and BC1 populations of crosses involving Jin23A indicated the presence of two independent dominant fertility restoring genes. The mode of action of the two genes varied in different crosses revealing three types of interaction, i.e. epistasis with dominant gene action, epistasis with recessive gene action, and epistasis with incomplete dominance.DOI: http://dx.doi.org/10.3329/bjpbg.v24i1.16997
Highlights
Precise understanding of genetics of fertility restoration is useful in planning a sound breeding strategy for development of superior restorers in a hybrid breeding program
Extensive research work on identification of restorers and maintainers and on inheritance of fertility restoration has been done on the WA (Wild Abortive) type cytoplasmic source only
The present study was undertaken to determine the genetic control of fertility restoration of WA-cytoplasmic genetic male sterility (CMS) system
Summary
Precise understanding of genetics of fertility restoration is useful in planning a sound breeding strategy for development of superior restorers in a hybrid breeding program It may help in the efficient transfer of restorer genes into other agronomical desirable genotypes. To be able to recognize the Rf in wild rice would facilitate the exploitation of new Rf alleles and give a better understanding of the origin and evolution of the fertility-restorer genes. With this view, the present study was undertaken to determine the genetic control of fertility restoration of WA-CMS system
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