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  1. Vol. 9 No. 2, p. 252-253
     
    Received: Aug 21, 1968
    Published: Mar, 1969


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doi:10.2135/cropsci1969.0011183X000900020046x

Chromosome Interchanges of Spontaneous Origin in Pearl Millet, Pennisetum Typhoides1

  1. Jerrel B. Powell and
  2. Glenn W. Burton2

Abstract

Abstract

Two chromosome interchanges of spontaneous origin occurring in pearl millet, Pennisetum typhoides (Burm.) Stapf and C. E. Hubb., are described. One of domestic origin, first isolated from Inbred 13, also occurs in the inbred ‘Tift 239.’ A second, found in a plant introduction from Upper Volta, Africa, has one rearranged chromosome that is common to both interchanges, as evidenced by rings of six chromosomes that form at diakinesis in plants heterozygous for both. Pollen fertility is approximately 67% in heterozygous plants with the Tift T13 interchange and approximately 48% in plants heterozygous for both interchanges. Seed set in F2 plants segregating for the semisterility due to the Tift T13 interchange was 39% less than the fertile segregates in one population.

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