Czech J. Genet. Plant Breed., 2012, 48(2):87-92 | DOI: 10.17221/164/2011-CJGPB

Genetics of fertility restoration of the A4 cytoplasmic-nuclear male sterility system in pearl milletOriginal Paper

Shashi Kumar GUPTA, Kedar Nath RAI, Mahalingam GOVINDARAJ, Aluri Sambasiva RAO
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh, India

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

Published: June 30, 2012  Show citation

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GUPTA SK, RAI KN, GOVINDARAJ M, RAO AS. Genetics of fertility restoration of the A4 cytoplasmic-nuclear male sterility system in pearl millet. Czech J. Genet. Plant Breed. 2012;48(2):87-92. doi: 10.17221/164/2011-CJGPB.
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