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Crop Science Abstract -

Cytoplasmic Male Sterility in Rye (Secale cereale L.)1


This article in CS

  1. Vol. 10 No. 5, p. 590-593
    Received: Mar 20, 1970

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  1. H. H. Geiger and
  2. F. W. Schnell2



Male-sterile segregates were found in 1966 in four S1 lines derived from crosses between plants of Argentinian ‘Pampa’ rye, Secale cereale L., and a Hohenheim inbred line as pollinator. Progenies of sibbed and open-pollinated male-sterile S1 plants were crossed with four inbred lines in 1967. Various degrees of male sterility, ranging from 0 to 100%, were observed (1968) in the progenies of these crosses. Average male sterility varied substantially between progenies of different inbred lines. In 1969, offspring from backcrossing inbred lines to male-sterile plants exhibited, with but few exceptions, complete male sterility. Backcrossing to male-fertile (restored) segregates yielded varying proportions of male-fertile, partially male-sterile, and male-sterile plants.

The results suggest a male sterility caused by interaction between Pampa cytoplasm and nuclear factors of the pollinator lines. Efficient restoration of pollen fertility by nuclear factors can be accomplished, but at present little can be said about its inheritance. The cytoplasmic male sterility should, for the first time, provide a means of large scale hybrid seed production in rye.

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