Genetics of fertility restoration of the A4 cytoplasmic-nuclear male sterility system in pearl millet
S.K. Gupta, K.N. Rai, M. Govindaraj, A.S. Raohttps://doi.org/10.17221/164/2011-CJGPBCitation:Gupta S.K., Rai K.N., Govindaraj M., Rao A.S. (2012): Genetics of fertility restoration of the A4 cytoplasmic-nuclear male sterility system in pearl millet. Czech J. Genet. Plant Breed., 48: 87-92.
Inheritance of fertility restoration of the A4 system of cytoplasmic-nuclear male sterility in pearl millet was investigated using six crosses between two diverse male sterile lines (A-lines) and three diverse restorers (R-lines). The segregation pattern of male sterile (S) and male fertile (F) plants observed in F2, and BC1 in two seasons at ICRISAT, Patancheru, indicated the dominant single-gene control of male fertility restoration. The segregation pattern in BC1F2 progenies derived from the fertile BC1 plants evaluated for one season provided further evidence for the single-gene control. The season did not have much effect on fertility restoration. The information on the single-gene control of fertility restoration will help in diversifying the restorer genetic base of the A4 CMS system and enhance R-line breeding efficiency in pearl millet.Keywords:
A4 cytoplasm; fertility restoration; inheritance; male sterility; Pennisetum glaucum